CN1385978A - Authority certification method and device for closed loop diversity mode 1 - Google Patents

Abstract

This invention relates to a weight certification method and its device used in closed loop diversity mode containing phase information fetch device, maximum-rate mergence RAKE and judgement device W2. By tripping and multiplexing the special physical channel signal of each channel transmitted from the base station, and tripping public signals, the resulted signals together with the original discontinuous pilot signals of antenna 2 are sent to be phase information fetch device and the compound information is merged by RAKE to be judged by the judgement device W2 to get the base station transmitted weight W2 of antenna 2.

Description

A kind of power authentication method and device that is used for closed-loop diversity mode 1

The present invention relates to the method for estimation and the device of the base station power in the diversity technique that CDMA mobile communication system adopts.

Adopt diversity technique can improve the communication performance of Radio Link significantly in the mobile communication system, it independently or at least is that highly incoherent multipath signal is realized by searching and utilizing in the nature wireless propagation environment.In diversity technique, closed-loop diversity mode 1 is the transmit diversity mode that adopt a kind of base station, and the finger receiving end is measured channel information according to frequency pilot sign, feeds back to transmitting terminal, and transmitting terminal is adjusted signal thus and sent phase place, makes instantaneous received power maximum.Because the radio signal propagation environment is very complicated in the reality, the signal of antenna for base station emission could arrive receiving terminal through repeatedly reflection, refraction, diffraction possibly, so just produced a plurality of similar copy of signal, a signal of promptly making a start divides mulitpath to arrive the destination with the different moment, and every paths is all different to amplitude, the phase effect of signal.For making receiving terminal can effectively receive the signal of base station, just need the base station to do corresponding adjustment in amplitude and phase place that transmitting terminal transmits on respectively to two antennas, promptly base station power is done correspondingly and adjusted.Like this, when the RAKE receiver of user side merges the multipath signal that receives, must obtain the metric that the base station is adjusted the phase place that transmits, promptly obtain the Launch Right of antenna for base station.

Obtain the method for base station power at present, promptly weigh authentication method, it is the time-multiplexed pilot (PILOT) of associating public (public) pilot channel (CPICH) and Dedicated Physical Control Channel (DPCCH), at first to the adjustment phase place of base station transmit signals estimate, hypothesis testing, again by adjusting the Launch Right that phase calculation obtains the base station.Because 1 phase place of adjusting an antenna of closed-loop diversity mode, the phase place of another root antenna does not adjust, and power does not adjust yet, all the time mean allocation on two antennas.The antenna of supposing to be used for not do the phase place adjustment is an antenna 1, and the Launch Right of antenna 1 is w ₁, w ₁All the time be constant value

Therefore the base station power that needs to obtain is the Launch Right of another root antenna, and promptly the Launch Right of antenna 2 supposes that this Launch Right is w ₂

A kind of authentication method of base station power is provided in the appendix A (3G TS25.214 V3.4.0) of third generation communication standards physical layer protocol.This method is carried out hypothesis testing to the adjustment phase place of base station transmit signals, need to construct the hypothesis testing inequality for this reason, hypothesis testing inequality according to structure carries out phase estimation respectively to strange, transmitting of even number time slot in the physical radio frame then, obtains the Launch Right of antenna for base station 2 at last according to above-mentioned estimated result.Above-mentioned strange, transmitting of even number time slot in the physical radio frame are carried out respectively in the process of phase estimation, need to use the measurement result of the SNIR ratio of noise-plus-interference gross power (signal power with), because the measurement of SNIR is subjected to the influence of complicated wireless propagation environment, bigger unsteadiness is arranged, thereby influence the accuracy and the reliability of antenna 2 phase estimation value; And the calculating more complicated of above-mentioned phase estimation, include a large amount of division arithmetics in the computational process, and the noise of Different Diameter is a time dependent amount with disturbing gross power again, so said method is difficult in hardware realizing.

At the problems referred to above, the object of the present invention is to provide a kind of simple, reliable, be easy to the hard-wired power authentication method of closed-loop diversity mode 1 and the device of realizing this method of being used for.

For achieving the above object, the invention provides a kind of power authentication method that is used for closed-loop diversity mode 1, this method comprises that the DPCH signal to all footpaths carries out following operation:

(1) with despreading of DPCH signal and the demultiplexing of base station transmit signals Dan Jing, obtain comprising the mixed signal of two antenna time-multiplexed pilot symbols, the common pilot channel signal despreading of base station transmit signals Dan Jing is obtained common pilot symbols, and obtain the original time-multiplexed pilot symbol of the antenna the same 2 at user side with the base station.

(2) utilize the mixed signal of two antenna time-multiplexed pilot symbols that above-mentioned steps (1) obtains, the original time-multiplexed pilot symbol and the common pilot symbols of antenna 2, obtain comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing;

(3) composite information to all footpaths carries out the merging of RAKE high specific, obtains comprising the phase place adjustment information w of antenna 2 ₂Comprehensive phase information;

(4) the comprehensive phase information of above-mentioned steps (3) is adjudicated, obtain the phase place adjustment information w of antenna 2 ₂, i.e. the Launch Right of antenna for base station 2.

Above described step (2) further comprise:

(A) the original time-multiplexed pilot symbol of the mixed signal of two antenna time-multiplexed pilot symbols, antenna 2 is carried out conjugate complex and take advantage of, obtain comprising the phase place adjustment information w of antenna 2 ₂Composite information;

(B) composite information that above-mentioned steps (A) is obtained adds up, and further obtains comprising the phase place phase place adjustment information w of antenna 2 ₂Composite information;

(C) utilize common pilot symbols, obtain the channel characteristic estimation value of antenna 2;

(D) result of above-mentioned steps (B) and step (C) is carried out conjugate complex and take advantage of, obtain comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing;

Above described step (C) also comprise, the channel characteristic estimation value of antenna 2 is added up, with the influence of attenuating noise.

The present invention also provides a kind of power authenticate device that is used for closed-loop diversity mode 1, comprises despreading Deplexing apparatus, local signal generating means, also comprises:

Phase information extraction means, the original time-multiplexed pilot symbol of the mixed signal that comprises two antenna time-multiplexed pilot symbols that is used to utilize the despreading Deplexing apparatus to provide, common pilot symbols and the antenna 2 that produces with the local signal generating means obtains comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing;

The RAKE high specific merges device, is used for the phase place adjustment information w that comprises antenna 2 with all footpaths ₂Composite information carry out the RAKE high specific and merge, obtain comprising the phase place adjustment information w of antenna 2 ₂Comprehensive phase information;

The W2 judgment device is used for the comprehensive phase information of RAKE high specific merging device output is adjudicated, and obtains the phase place adjustment information w of antenna 2 ₂, promptly base station is weighed.

Described phase information extraction means comprises:

The first conjugation multiplier is used for original time-multiplexed pilot symbol with the mixed signal of two antenna time-multiplexed pilot symbols, antenna 2 and carries out conjugate complex and take advantage of, and obtains comprising the phase place adjustment information w of antenna 2 ₂Stationary phase adjustment information w with antenna 1 ₁Composite information;

First accumulator is used for the composite information that the first conjugation multiplier obtains is added up, and is further only comprised the phase place phase place adjustment information w of antenna 2 ₂The stationary phase adjustment information w that does not comprise antenna 1 ₁Composite information;

Characteristic of channel separator is used to utilize common pilot symbols, obtains the channel characteristic estimation value of antenna 2;

The second conjugation multiplier is used for result with first accumulator and characteristic of channel separator and carries out conjugate complex and take advantage of, and obtains removing the phase place adjustment information w that phase deviation that channel fading causes only comprises antenna 2 ₂The composite information of Dan Jing.

Second accumulator between described characteristic of channel separator and the described second conjugation multiplier is used for the channel characteristic estimation value of antenna 2 is added up, with the influence of attenuating noise.

Because the present invention does not need to carry out the measurement of SNIR in the power verification process, the base station power of the antenna 2 of acquisition is not subjected to the influence of SNIR accuracy, makes the present invention simple, reliable; And the present invention utilized the mixed signal of two antenna time-multiplexed pilot symbols, estimates the fading characteristic of channel, passes through w ₂Adjust the phase place that transmits of antenna 2 in real time,, improve the signal to noise ratio of RAKE receiver received signal, strengthened reliability of the present invention with the influence that activation alleviates channel fading; Simultaneously, because each step operation of the present invention does not all have division arithmetic, not only make computation amount, and be convenient to the hardware realization.

The present invention is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the embodiment flow chart of the method for the invention;

Fig. 2 is single footpath data demodulates embodiment block diagram of device of the present invention;

Fig. 3 is the block diagram that device of the present invention is used for demodulation DPCH data.

For proving absolutely the present invention, at first prior art is carried out brief analysis.The first step of the authentication method of existing base station power is adjusted phase place to base station transmit signals and is carried out hypothesis testing, need construct the hypothesis testing inequality for this reason: $2\underset{j=1}{\overset{L}{\mathrm{\Σ}}}\frac{1}{{\mathrm{\δ}}_j^2}\left\{\sqrt{2}\mathrm{Re}\left(\mathrm{\γ}{h}_{2j}^{\left(d\right)}{h}_{2j}^{\left(p\right)*}\right)\right\}>\ln \left(\frac{\stackrel{\‾}{p}({\mathrm{\φ}}_{\mathrm{Rx}}=\mathrm{\π})}{\stackrel{\‾}{p}({\mathrm{\φ}}_{\mathrm{Rx}}=0)}\right)$ Wherein Be the noise of j paths and the gross power of interference.Real in the bracket is got in Re (.) expression, and * represents to get the conjugation of plural number. Be to use the channel estimating of DPCCH special-purpose control physical channel to being done from the j paths of second antenna, Be to use the channel estimating of CPICH common pilot physical channel to being done from the j paths of second antenna.γ's square is the DPCH DPCH and the ratio of CPICH common pilot physical channel SNIR measured value.The right of inequality is to be 0 or the hypothesis testing likelihood function of π to signal phase.

Defined variable x ₀,, use variable x with in subsequent step ₀The phase estimation of the even number time slot signal emission in the corresponding physics radio frames.If top inequality is set up, then x ₀=0, otherwise x ₀=π.

In second step, construct another hypothesis testing inequality: $-2\underset{j=1}{\overset{L}{\mathrm{\Σ}}}\frac{1}{{\mathrm{\δ}}_j^2}\left\{\sqrt{2}\mathrm{Im}\left(\mathrm{\γ}{h}_{2j}^{\left(d\right)}{h}_{2j}^{\left(p\right)*}\right)\right\}>\ln \left(\frac{\stackrel{\‾}{p}({\mathrm{\φ}}_{\mathrm{Rx}}=-\mathrm{\π}/2)}{\stackrel{\‾}{p}({\mathrm{\φ}}_{\mathrm{Rx}}=\mathrm{\π}/2)}\right)$

Defined variable x ₁,, use variable x with in subsequent step ₁The phase estimation that odd number time slot in the corresponding physics radio frames transmits.If following formula is set up, then x ₁=-pi/2, otherwise x ₁=pi/2.

In the 3rd step, press variable x with reference to following table ₀, x ₁With the corresponding relation of time slot, calculate x according to pressing the above-mentioned first step and the hypothesis testing inequality in second step each time slot to 15 time slots of a frame ₀Or x ₁

Time slot	?0	?1	?2	?3	?4	?5	?6	?7	?8	?9	?10	?11	?12	?13	?14
																	?x 0	?x 1	?x 0	?x 1	?x 0	?x 1	?x 0	?x 1	?x 0	?x 1	?x 0	?x 1	?x 0	?x 1	?x 0

The 4th step is after above-mentioned the 3rd step estimates the phase place that transmits of each time slot, again by following formula, by the estimated value x of phase place ₀, x ₁Obtain base station power w ₂Estimation. ${\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="A0111810100211.png"\; state="\{\{state\}\}">w</figure-callout>}}_2=\frac{\underset{i=0}{\overset{1}{\mathrm{\&Sigma;}}}\sin \left(x_i\right)}{2}+j\frac{\underset{i=0}{\overset{1}{\mathrm{\&Sigma;}}}\cos \left(x_i\right)}{2}$ $w_1=\sqrt{2}/2$ By above-mentioned explanation as can be seen: existing method to use in the described first step with in second step SNIR measurement result γ, , SNIR measures owing to be subjected to the influence of complicated wireless propagation environment and shows great unsteadiness.Thereby have influence on the described first step and phase estimation value X in second step ₀, x ₁Accuracy and reliability, promptly phase estimation is too big to the dependence that SNIR measures.In addition, existing method all has divided by δ in the described first step with in second step _jDivision arithmetic, and δ _jBe again a time dependent amount, make this method be difficult in hardware, realize like this.

The first step of the method for the invention, despreading of DPCH signal and demultiplexing with base station transmit signals Dan Jing, obtain comprising the mixed signal of two antenna time-multiplexed pilot symbols, the common pilot channel signal despreading of base station transmit signals Dan Jing is obtained common pilot symbols, and produce the original time-multiplexed pilot symbol of the antenna 2 the same at user side with local signal generator with the base station.Because the RAKE received signal comprises DPCH signal and common pilot physical channel signal, DPCH signal to wherein Dan Jing carries out the mixed signal that the despreading demultiplexing obtains comprising two antenna time-multiplexed pilot symbols, common pilot channel signal despreading to wherein Dan Jing obtains common pilot symbols, but the original interruption symbol of antenna 2 can not obtain by despreading, because these time-multiplexed pilot symbols are known, therefore need produce with local signal generator.

Wherein, the mixed signal p that comprises two antenna time-multiplexed pilot symbol PILOT _iCan be expressed as: p _i=γ (w ₁Ps _1ih _1j+ w ₂Ps _2ih _2j)+n ₀

H wherein _1j, h _2jBe respectively the ideal communication channel characteristic from the j paths of antenna 1,2, γ ²Be DPCH and the ratio of CPICH channel SNIR measured value, ps _1i, ps _2iBe the antenna 1 after QPSK (the four phase orthogonal PSKs) modulation and the original time-multiplexed pilot symbol sebolic addressing of antenna 2, n ₀It is noise-plus-interference.

In second step, utilize the mixed signal p of two antenna time-multiplexed pilot symbols that the above-mentioned first step obtains _i, antenna 2 original time-multiplexed pilot symbol ps _2iAnd common pilot symbols, obtain comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing.This step further is decomposed into following substep:

(A) with the mixed signal p of two antenna time-multiplexed pilot symbols _i, antenna 2 original time-multiplexed pilot symbol ps _2iCarry out conjugate complex and take advantage of, obtain comprising the phase place adjustment information w of antenna 2 ₂Stationary phase adjustment information w with antenna 1 ₁Composite information;

(B) composite information that above-mentioned steps (A) is obtained adds up, and accumulative frequency is N/2, promptly has: $\underset{i=1}{\overset{N/2}{\mathrm{\&Sigma;}}}{\mathrm{ps}}_{2i}^{*}*p_i=\mathrm{\&gamma;}{w}_1{h}_{1j}\underset{i=1}{\overset{N/2}{\mathrm{\&Sigma;}}}{\mathrm{ps}}_{1i}*{\mathrm{ps}}_{2i}^{*}+\mathrm{\&gamma;}{w}_2{h}_{2j}\underset{i=1}{\overset{N/2}{\mathrm{\&Sigma;}}}\left|\right|{\mathrm{ps}}_{2i}{\left|\right|}^2+n_1$

＝2γw ₂h _2j+n ₁

Wherein N is the time-multiplexed pilot bit number of a time slot.

The phase place phase place adjustment information w that like this, is further only comprised antenna 2 ₂The stationary phase information w that does not comprise antenna 1 ₁Composite information;

Because the time-multiplexed pilot of two antennas is uncorrelated and completely orthogonal in the closed loop mode 1, so removed the phase information w that transmits of antenna 1 through the signal after above-mentioned steps (A) and the step (B) ₁, extract the phase place adjustment information w that transmits that comprises antenna 2 ₂Composite information.Therefore, above-mentioned steps (A) and step (B) have constituted the correlation detector of signal jointly, detect the w that comprises of expectation ₂Signal.But this composite information still includes noise n ₁

(C) utilize common pilot symbols, obtain the channel characteristic estimation value of antenna 2.The channel characteristic estimation value of described antenna 2 can separate obtaining from common pilot symbols.For obtaining better effect, the channel characteristic estimation value of antenna 2 can be added up in this step, accumulative frequency is the common pilot symbolic number that is less than or equal to a time slot, generally effect is best when equaling the common pilot symbolic number of a time slot.With the influence of attenuating noise, improve the performance of characteristic of channel separator.Because the communication system that closed loop mode 1 is used must be a multiple antenna communication, the propagation path difference that the same RAKE receiver that arrives the signal of launching on these antenna experiences, the signal attenuation degree is also different, but what receive when RAKE receives is mixed signal, so need from public (public) frequency pilot sign, separate the estimated value of the signal attenuation degree on the every antenna that obtains, be the channel characteristic estimation value, could further detect the Launch Right w of antenna 2 like this ₂

(D) result of above-mentioned steps (B) and step (C) is carried out conjugate complex and take advantage of, remove the signal phase deviation that channel fading causes, obtain comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing.Process above-mentioned steps (B) is though the signal that obtains comprises w ₂Information, but do not solve the phase place and the amplitude error h that still have channel fading to cause fully _2j, the effect of this step is to eliminate the phase deviation that channel fading causes, and obtains w ₂Correct phase.If

Be channel estimating, then from antenna 2 single footpath CPICH $h_{2j}^{\left(p\right)}=h_{2j}+{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A0111810100211.png"\; state="\{\{state\}\}">n</figure-callout>}}_2$ , the result of this step conjugation multiplication is: ${\left(h_{2j}^{\left(p\right)}\right)}^{*}*(2\mathrm{\&gamma;}{w}_2{h}_{2j}+n_1)=2\mathrm{\&gamma;}{\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="A0111810100211.png"\; state="\{\{state\}\}">w</figure-callout>}}_2\left|\right|h_{2j}{\left|\right|}^2+{\mathrm{<figure-callout\; id="3"\; label="n"\; filenames="A0111810100211.png"\; state="\{\{state\}\}">n</figure-callout>}}_3$

The above results is the phase place adjustment information w that comprises antenna 2 ₂The composite information of Dan Jing.

The 3rd step to each bar footpath of base station transmit signals, repeated the above-mentioned first step and second step, and the composite information with all footpaths carries out the merging of RAKE high specific then, obtains comprising the phase place adjustment information w of antenna 2 ₂Comprehensive phase information.This comprehensive phase information is: $2\mathrm{\&gamma;}{\mathrm{<figure-callout\; id="2"\; label="w"\; filenames="A0111810100211.png"\; state="\{\{state\}\}">w</figure-callout>}}_2\underset{j=1}{\overset{L}{\mathrm{\&Sigma;}}}\left|\right|h_{2j}{\left|\right|}^2+{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A0111810100211.png"\; state="\{\{state\}\}">n</figure-callout>}}_4$

This step has been utilized the comprehensively characteristics of the signal of multipath of RAKE receiver, improve the accuracy of detection signal, so the effect of this step is to strengthen desired signal w ₂Intensity, the n of attenuating noise ₄Intensity.

The 4th step, the comprehensive phase information of above-mentioned steps (3) is adjudicated, obtain the phase place adjustment information w of antenna 2 ₂, promptly base station is weighed.Above-mentioned judgement can be carried out according to the real part and the imaginary part of described comprehensive phase information, like this, can obtain the phase place adjustment information w of antenna 2 according to following process ₂Be the Launch Right of antenna for base station 2: when comprehensive phase place is positioned at first quartile, the phase place that transmits of antenna 2 is rotated counterclockwise 45 degree, when comprehensive phase place is positioned at second quadrant, the phase place that transmits of antenna 2 is rotated counterclockwise 135 degree, when comprehensive phase place is positioned at third quadrant, and the phase place that transmits of antenna 2 135 degree that turn clockwise, when comprehensive phase place is positioned at four-quadrant, the phase place that transmits of antenna 2 45 degree that turn clockwise.

In the present invention, the measured value γ of SNIR is a positive number all the time, therefore, its size no matter, do not influence final step of the present invention to the judgement which quadrant antenna 2 Launch Right w2 are positioned at,, be not subjected to SNIR to measure inaccurate influence so the invention process need not carried out the measurement of SNIR.The Launch Right w2 of the antenna 2 that the present invention authenticates is used to adjust the phase place that transmits of antenna 2, with the emission that transmits of antenna 1, and the influence of the anti-channel fading of energy, the signal to noise ratio of raising RAKE receiver received signal, the i.e. ability of detection signal.In addition, the inventive method does not have division arithmetic, has only multiplication and add operation, computation amount, and hardware is realized simple, cost is low.

The present invention also provides a kind of power authenticate device that is used for closed-loop diversity mode 1, and with reference to figure 2, it comprises despreading Deplexing apparatus 1 and local signal generating means 9, also comprises:

Phase information extraction means 2, the mixed signal, the common pilot symbols that comprise two antenna time-multiplexed pilot symbols of utilizing the despreading Deplexing apparatus to provide is provided, at the original time-multiplexed pilot symbol of user side, obtain comprising the phase place adjustment information w of antenna 2 with the antenna 2 the same of local signal generator generation with base station ₂The composite information of Dan Jing;

The RAKE high specific merges device 3, is used for the phase place adjustment information w that comprises antenna 2 with all footpaths ₂Composite information carry out the RAKE high specific and merge, obtain comprising the phase place adjustment information w of antenna 2 ₂Comprehensive phase information;

W2 judgment device 4 is used for the maximum comprehensive phase information that merges ratio device output of RAKE is adjudicated, and obtains the phase place adjustment information w of antenna 2 ₂, i.e. the Launch Right of antenna for base station 2.

Described phase information extraction means 2 comprises:

The first conjugation multiplier 23 is used for original time-multiplexed pilot symbol with the mixed signal of two antenna time-multiplexed pilot symbols, antenna 2 and carries out conjugate complex and take advantage of, and obtains comprising the phase place adjustment information w of antenna 2 ₂Stationary phase adjustment information w with antenna 1 ₁Composite information;

First accumulator 24 is used for the composite information that the first conjugation multiplier obtains is added up, and is further only comprised the phase place adjustment information w of antenna 2 ₂, do not comprise the stationary phase adjustment information w of antenna 1 ₁Composite information;

Characteristic of channel separator 21 is used to utilize common pilot symbols, obtains the channel characteristic estimation value of antenna 2;

The second conjugation multiplier 25 is used for result with first accumulator and characteristic of channel separator and carries out conjugate complex and take advantage of, and obtains removing the phase place adjustment information w that signal phase deviation that channel fading causes only comprises antenna 2 ₂The composite information of Dan Jing.

Between described characteristic of channel separator 21 and the described second conjugation multiplier 25, also comprise one second accumulator 22, be used for the channel characteristic estimation value of antenna 2 is added up, with the influence of attenuating noise.

Below in conjunction with device of the present invention being used for demodulation DPCH data instance, the invention will be further described.With reference to figure 3.

Among Fig. 3, the output of channel separation device 21 of the present invention is sent into channel estimator 5 and is carried out channel estimating, the output of device of the present invention, the power w of authentication authorization and accounting ₂, with the fixed transmission power w of antenna 1 ₁, enter complex multiplier 6 with the output of channel estimator 5 and take advantage of the back again by adder 7 additions, input to demodulator 8 demodulation DPCH data then.Like this, the output of characteristic of channel separator 21 enters the influence of channel estimator 5 smooth noises again, the power w that authenticates with the present invention ₂And the power w that fixes in the pattern 1 ₁The addition again of multiplying each other will obtain shape such as w ₁h _1j+ w ₂h _2jSignal, enter demodulator 8 conjugate multiplication with the DPCH signal of RAKE despreading, obtain the signal after the demodulation, thereby recover the signal of antenna for base station transmitting terminal.

In this example, suppose that in the down link from the base station to the terminal bit number N of time-multiplexed pilot PILOT is 8 among the DPCCH, signal is propagated the mulitpath that forms in wireless propagation environment to count L be 2, Block Error Rate (BLER) is used in the measurement of received signal quality, establishes Block Error Rate and remains on 1%.

Among Fig. 2, the process of Launch Right of obtaining antenna 2 is with reference to figure 1.In step 1, with the DPCH signal of base station transmit signals Dan Jing through 1 despreading of despreading demodulation multiplexer and demultiplexing, obtain comprising the mixed signal of two antenna time-multiplexed pilot symbols, the common pilot channel signal of base station transmit signals Dan Jing through 1 despreading of despreading demodulation multiplexer, is obtained common pilot symbols.In step 2, produce the original time-multiplexed pilot symbol of antenna 2 with local signal generator.In step 3, with the mixed signal p of two antenna time-multiplexed pilot symbols _i, antenna 2 original time-multiplexed pilot symbol ps _2iCarry out conjugate complex at the first conjugation multiplier 23 and take advantage of, obtain comprising the phase place adjustment information w of antenna 2 ₂With antenna 1 stationary phase adjustment information w ₁Composite information.In step 4, the composite information that above-mentioned steps 2 is obtained adds up 4 times in first accumulator 24, is only comprised the phase place adjustment information w of antenna 2 ₂The stationary phase adjustment information w that does not comprise antenna 1 ₁Composite information.In step 5, the common pilot signal after the despreading enters characteristic of channel separator 21, isolates the characteristic of channel of antenna 1,2.In step 6, the characteristic of channel of the antenna 2 of the output of characteristic of channel separator 21 enters second accumulator 22, and the constant input value that adds up for example adds up 5 times.In step 7, the output of first accumulator 24 enters the second conjugation multiplier 25 with the output signal of second accumulator 22, carries out conjugate complex and takes advantage of.In step 8, the 1st, 2 paths are all carried out the operation of above-mentioned steps 1 to step 6, enter RAKE high specific merging device 3 then together and merge.In step 9, the output that the RAKE high specific merges device 3 enters W2 judgment device 4, adjudicates according to the real part imaginary part of symbol of input and obtains base station transmission route w ₂, and then the phase place that transmits of adjustment antenna 2.

By under identical condition, translational speed as the wireless propagation environment of Rayleigh fading, two propagation paths, user terminal is lower, the power authentication method that adopts the present invention respectively and mentioned and traditional power authentication method carry out closed-loop diversity mode 1 emulation of down link, obtain simulation result as shown in the table, as seen, the present invention compares with conventional method, has preferable performance.Wherein 4%, 10% is respectively the bit error rate of propagating from the upward signal of terminal to base station.

Different technologies	Unit	??DPCH_EC/Ior(4％)	????DPCH_EC/Ior(10％)
				The used technology of the present invention	??dB	??-20.31	??????-20.16
Traditional power authentication techniques	??dB	??-20.1	??????-19.8

Claims (10)

1, a kind of power authentication method that is used for closed-loop diversity mode 1 is characterized in that, this method comprises that the DPCH signal to all footpaths carries out following operation:

(1) with despreading of DPCH signal and the demultiplexing of base station transmit signals Dan Jing, obtain comprising the mixed signal of two antenna time-multiplexed pilot symbols, the common pilot channel signal despreading of base station transmit signals Dan Jing is obtained common pilot symbols, and obtain the original time-multiplexed pilot symbol of the antenna the same 2 at user side with the base station.

(2) utilize the mixed signal of two antenna time-multiplexed pilot symbols that above-mentioned steps (1) obtains, the original time-multiplexed pilot symbol and the common pilot symbols of antenna 2, obtain comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing;

(3) composite information to all footpaths carries out the merging of RAKE high specific, obtains comprising the phase place adjustment information w of antenna 2 ₂Comprehensive phase information;

(4) the comprehensive phase information of above-mentioned steps (3) is adjudicated, obtain the phase place adjustment information w of antenna 2 ₂, i.e. the Launch Right of antenna for base station 2.

2, power authentication method according to claim 1 is characterized in that: described step (2) further comprises:

(A) the original time-multiplexed pilot symbol of the mixed signal of two antenna time-multiplexed pilot symbols, antenna 2 is carried out conjugate complex and take advantage of, obtain comprising the phase place adjustment information w of antenna 2 ₂Stationary phase adjustment information w with antenna 1 ₁Composite information;

(B) composite information that above-mentioned steps (A) is obtained adds up, and is further only comprised the phase place phase place adjustment information w of antenna 2 ₂, do not comprise the stationary phase adjustment information w of antenna 1 ₁Composite information;

(C) utilize common pilot symbols, obtain the channel characteristic estimation value of antenna 2;

(D) result of above-mentioned steps (B) and step (C) is carried out conjugate complex and take advantage of, obtained removing the phase place adjustment information w that phase deviation that channel fading causes only comprises antenna 2 ₂The composite information of Dan Jing;

3, power authentication method according to claim 2 is characterized in that: described step (C) also comprises, the channel characteristic estimation value of antenna 2 added up, with the influence of attenuating noise.

4, power authentication method according to claim 2 is characterized in that: the described common pilot symbols of utilizing, the channel characteristic estimation value of acquisition antenna 2 separates obtaining from common pilot symbols.

5, power authentication method according to claim 2 is characterized in that: in the described step (B) composite information is added up, accumulative frequency is N/2, and N is the time-multiplexed pilot bit number of a time slot.

6, power authentication method according to claim 1 is characterized in that: in described step (4), comprehensive phase information is adjudicated, carry out according to the real part and the imaginary part of described comprehensive phase information.

7, power authentication method according to claim 6 is characterized in that: the described phase place adjustment information w that obtains antenna 2 ₂It is the Launch Right of antenna for base station 2, be to be positioned at first quartile when comprehensive phase place, the phase place that transmits of antenna 2 is rotated counterclockwise 45 degree, and when comprehensive phase place is positioned at second quadrant, the phase place that transmits of antenna 2 is rotated counterclockwise 135 degree, when comprehensive phase place is positioned at third quadrant, the phase place that transmits of antenna 2 135 degree that turn clockwise, when comprehensive phase place is positioned at four-quadrant, the phase place that transmits of antenna 2 45 degree that turn clockwise.

8, a kind of power authenticate device that is used for closed-loop diversity mode 1 comprises despreading Deplexing apparatus, local signal generating means, and it is characterized in that: it also comprises:

The mixed signal that comprises two antenna time-multiplexed pilot symbols, the common pilot symbols of utilizing the despreading Deplexing apparatus to provide and the original time-multiplexed pilot symbol of using the antenna 2 the same with base station of local signal generating means generation are provided phase information extraction means.Obtain comprising the phase place adjustment information w of antenna 2 ₂The composite information of Dan Jing;

The RAKE high specific merges device, is used for the phase place adjustment information w that comprises antenna 2 with all footpaths ₂Composite information carry out the RAKE high specific and merge, obtain comprising the phase place adjustment information w of antenna 2 ₂Comprehensive phase information;

The W2 judgment device is used for the comprehensive phase information of RAKE high specific merging device output is adjudicated, and obtains the phase place adjustment information w of antenna 2 ₂, promptly base station is weighed.

9, power authenticate device according to claim 8, it is characterized in that: described phase information extraction means comprises:

The first conjugation multiplier is used for original time-multiplexed pilot symbol with the mixed signal of two antenna time-multiplexed pilot symbols, antenna 2 and carries out conjugate complex and take advantage of, and obtains comprising the phase place adjustment information w of antenna 2 ₂Stationary phase adjustment information w with antenna 1 ₁Composite information;

First accumulator is used for the composite information that the first conjugation multiplier obtains is added up, and is further only comprised the phase place adjustment information w of antenna 2 ₂The composite information that does not comprise the stationary phase adjustment information of antenna 1;

Characteristic of channel separator is used to utilize common pilot symbols, obtains the channel characteristic estimation value of antenna 2;

The second conjugation multiplier is used for result with first accumulator and characteristic of channel separator and carries out conjugate complex and take advantage of, and obtained removing the phase place adjustment information w that phase deviation that channel fading causes only comprises antenna 2 ₂The composite information of Dan Jing.

10, power authenticate device according to claim 9 is characterized in that: second accumulator between described characteristic of channel separator and the described second conjugation multiplier is used for the channel characteristic estimation value of antenna 2 is added up, with the influence of attenuating noise.

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