CN104124986B - Wireless signal receiver and signal processing method thereof - Google Patents
Wireless signal receiver and signal processing method thereof Download PDFInfo
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- CN104124986B CN104124986B CN201310145037.9A CN201310145037A CN104124986B CN 104124986 B CN104124986 B CN 104124986B CN 201310145037 A CN201310145037 A CN 201310145037A CN 104124986 B CN104124986 B CN 104124986B
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Abstract
The present invention provides a kind of wireless signal receiver and signal processing method thereof.The wireless signal receiver that the present invention provides comprises receiver module, automatic growth control module, measurement module, decoder module and control module.This receiver module is in order to receive a wireless signal.This automatic growth control module in order to adjust an amplitude of this wireless signal according to a yield value, to produce signal after an adjustment.This measurement module is in order to measure a signal intensity of signal after this adjustment.This decoder module system is in order to decode signal after this adjustment.When after this decoder module judges this adjustment, signal corresponds to the beacon package sent from a transmission end, this control module adjusts this yield value according to this signal intensity.
Description
Technical field
The present invention is relevant to wireless telecommunication system, and especially with the automatic gain control in wireless signal receiver
System (automatic gain control, AGC) technology is correlated with.
Background technology
The receiving terminal of WLAN (wireless local area network, WLAN) system must have
Receive the ability of the different signal of multiple intensity.In practice, receiving terminal faced by signal intensity difference may
Up to 90dB.Position automatic growth control (AGC) circuit in receiving terminal front end is responsible for adjusting shaking of input signal
Width, after making adjustment, the amplitude of signal falls in the dynamic range of follow-up simulation numeral-transducer.If automatic gain
Control circuit running improper, it is provided that to simulate numeral-transducer signal amplitude may excessive and cause simulation
Numeral-transducer is saturated, it is also possible to too small and cause signal noise ratio the lowest, and then affects decoded result
Correctness.
In current art, receiving terminal stores a fixing initial yield value.Perform envelope starting every time
Before bag searching procedure, the yield value of automatic gain control circuit is reset as this initial yield value.Automatic gain
Control circuit can dynamically adjust its gain according to the amplitude of input signal subsequently from this initial yield value
Value.If it will be appreciated that it is bigger with this initial yield value difference to be suitable to receive package yield value above,
Automatic gain control circuit the most just needs the more time to begin to find out suitable yield value.
Most automatic gain control circuits must find out suitable yield value within certain time limit.With
As a example by 802.11a/g/n communication specification, this time limit length is eight microseconds (μ s), that is the short (short above of package
Preamble) length.It is said that in general, the distance between transmission end and receiving terminal is more remote, the letter that receiving terminal receives
Number intensity the most weak.It practice, between receiving terminal (such as notebook computer or smart mobile phone) and transmission end away from
From being definite value.In different occasions, it is provided that the transmission end of communication link is the most different.At the beginning of Gu Ding
Beginning yield value obviously will not be applicable to various wireless signal strength.If initial yield value and target gain value
Gap is too big, causes automatic gain control circuit cannot find out suitable yield value in time, and receiving terminal just has can
The package that transmission end (such as radio access device) provides can be omitted.In that case, receiving terminal may require that biography
Sending end sends the package that content is identical again, causes the overall transfer efficiency of system to decline.
Summary of the invention
For solving the problems referred to above, the present invention proposes a kind of automatic gain control circuit, one comprises automatic gain
The wireless signal receiver of control circuit, and its signal processing method.Automatic gain control according to the present invention
The beacon package (beacon packet) that circuit processed, receptor and signal processing method utilize transmission end to send determines
One gain initial value, for automatic gain control circuit.This way contributes to shortening automatic growth control
The package that module sends for same radio access device subsequently finds the time required for appropriate gain value.This
Bright concept can be widely used in various has transmission beacon package or the wireless telecommunication system of similar reference signal,
It is not limited meeting the wireless telecommunication system of 802.11n communications protocol.
A specific embodiment according to the present invention is a kind of wireless signal receiver, wherein comprises a reception mould
Block, an automatic growth control module, a measurement module, a decoder module and a control module.This reception mould
Block is in order to connect a wireless signal.This automatic growth control module is in order to adjust this wireless signal according to a yield value
An amplitude, to produce signal after an adjustment.This measurement module is in order to measure a signal of signal after this adjustment
Intensity.This decoder module is in order to decode signal after this adjustment.After this decoder module judges this adjustment, signal is
When corresponding to the beacon package sent from a transmission end, this control module adjusts this increasing according to this signal intensity
Benefit value.
Another specific embodiment according to the present invention is the automatic growth control electricity of a kind of dynamic adjustment yield value
Road, in order to adjust an amplitude of the wireless signal that a wireless signal receiver receives.This automatic growth control
Circuit comprises an automatic growth control module, a measurement module, a decoder module and a control module.Should be certainly
Dynamic gain control module in order to adjust an amplitude of this wireless signal according to a yield value, after producing an adjustment
Signal.This measurement module is in order to measure a signal intensity of signal after this adjustment.This decoder module is in order to decode
Signal after this adjustment.After this decoder module judges this adjustment, signal corresponds to sent from a transmission end
During beacon package, this control module adjusts this yield value according to this signal intensity.
Another specific embodiment according to the present invention is a kind of signal processing being applied to wireless signal receiver
Method.This wireless signal receiver comprises an automatic growth control module.The method is first carried out a reception step
Rapid: to receive a wireless signal.Then, the method performs a set-up procedure: make this automatic growth control module
An amplitude of this wireless signal is adjusted, to produce signal after an adjustment according to a yield value.Subsequently, the method
Perform a measuring process: measure a signal intensity of signal after this adjustment.Then, after this adjustment, signal is solved
Code.When after this adjustment, signal is judged as corresponding to the beacon package sent from a transmission end, and the method is held
Row one set-up procedure: adjust this yield value according to this signal intensity.
Accompanying drawing explanation
For the above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing to this
Bright detailed description of the invention elaborates, wherein:
Fig. 1 is the functional block diagram according to the wireless signal receiver in one embodiment of the invention.
Fig. 2 is the flow chart according to the signal processing method in one embodiment of the invention.
Element numbers explanation in figure:
100: wireless signal receiver
11: receiver module
12: automatic growth control module
13: measurement module
14: decoder module
15: control module
S21～S26: process step
Detailed description of the invention
A specific embodiment according to the present invention is a kind of wireless signal receiver, its functional block diagram such as Fig. 1
Shown in.Wireless signal receiver 100 comprises receiver module 11, automatic growth control module 12,
Measurement module 13, one decoder module 14 and a control module 15.In reality is applied, reception of wireless signals
Device 100 can be incorporated into inside various electronic installation, such as desktop computer, notebook computer, smart mobile phone,
Also can be individually present.
According to 802.11n communications protocol, a wireless access point periodically must send beacon envelope with the forms of broadcasting
Bag (beacon packet), and carry in this package its service setting identification code (service set identifier,
SSID), medium plan (media access control, MAC) address, the information such as transfer rate of support,
For being intended to connect the receiving terminal reference of this wireless access point.Wireless signal receiver 100 is i.e. with the letter of beacon package
Number intensity is foundation, determines the initial yield value of automatic growth control module 12.Through following description, this
Those of ordinary skill in technical field that the present invention belongs to is it is understood that the concept that the present invention proposes is equally applicable for various
Having transmission beacon package or the wireless telecommunication system of similar reference signal, its application category is not to meet 802.11n
The wireless telecommunication system of communications protocol is limited.
Receiver module 11 is to receive a wireless signal, and provides this wireless signal to automatic gain control
Molding block 12.In practice, receiver module 11 can be including but not limited to antenna.Wireless signal receiver 100
In store preset gain value Gdefault.Automatic growth control module 12 is with preset gain value GdefaultAdjust
The amplitude of this wireless signal, to produce signal after an adjustment.After this adjustment, signal is transferred to measure mould respectively
Block 13 and decoder module 14.The intensity of signal after measurement module 13 this adjustment of responsible measurement.Decoder module
14 is in order to be decoded by signal after this adjustment.Should be noted that, the enforcement measuring signal intensity and decoding is thin
Joint, known to persons of ordinary skill in the technical field of the present invention, repeats no more in this.
In an embodiment, measurement module 13 is that to measure in a preset period of time of signal after this adjustment flat
All intensity, as this signal intensity.For example, the available lower column index rolling average of measurement module 13
(exponential moving average) equation calculates this mean intensity:
E{RSSI [n] }=Coeff_avg*RSSI [n]+(1-Coeff_avg) * E{RSSI [n-1] },
Wherein RSSI [n] represents a up-to-date signal intensity sampling value, E{RSSI [n-1] } represent and do not comprise this
New signal intensity sampling value and the mean intensity that calculates, E{RSSI [n] } represent and comprise this fresh signal intensity
The mean intensity calculated after sampling value.Coeff_avg is a mean parameter, and its size is not with certain number
Value is limited.
If signal after this adjustment can be correctly decoded by decoder module 14, and judges signal system pair after this adjustment
One or more beacon packages that Ying Yu sends from a transmission end, control module 15 is i.e. according to measurement module 13
The signal intensity E{RSSI [n] produced } determine an initial yield value Ginitial, for automatic gain control module 12
Use.More particularly, when automatic growth control module 12 receives new wireless signal subsequently, it is certainly
Initial yield value GinitialStart, dynamically adjust its yield value according to the amplitude of input signal.In an embodiment
In, control module 15 is to calculate initial yield value G according to following equationinitial:
Ginitial[n]=RSSI_to_Ginitial(E{RSSI [n] })+offset,
Wherein RSSI_to_GinitialTransformational relation function between () representation signal intensity and yield value, parameter
Offset then represents a corrected value.
Unless wireless signal receiver 100 is the state being in quickly movement, connect from same radio access device
The signal intensity difference of the various packages received is not too large.Therefore, according to initial yield value Ginitial[n] resets
Automatic growth control module 12 contributes to shortening automatic growth control module 12 subsequently for same radio access
The package that device sends finds the time required for appropriate gain value.Whereby, wireless signal receiver 100 is because of certainly
Dynamic gain control module 12 operates speed and crosses slow and omit the probability of package and can be greatly reduced, and then is able to
The overall transfer efficiency of lifting wireless system residing for radio area network receptor 100.
In an embodiment, according to initial yield value GinitialAfter [n] resets automatic growth control module 12,
If decoder module 14 does not solves any package in one presets reset stage, control module 15 just will increase automatically
Benefit control module 12 resets to employing preset gain value GdefaultAs this initial yield value, make wireless signal
Receptor 100 restarts to find new beacon package and corresponding new initial yield value.
In an embodiment, control module 15 is periodically to change according to a fresh signal intensity automatically to increase
The initial yield value that benefit control module 12 is used.More particularly, measurement module 13 is designed to hold
The continuous intensity supervising beacon package, and control module can the most optionally adjust automatic growth control module 12
The initial yield value used, to instant and dynamically find out appropriate initial yield value.
Another specific embodiment according to the present invention is the automatic growth control electricity of a kind of dynamic adjustment yield value
Road, in order to adjust an amplitude of the wireless signal that a wireless signal receiver receives.This automatic growth control
Circuit comprises the automatic growth control module 12 shown in Fig. 1, measurement module 13, decoder module 14 and controls
Module 15.This automatic gain control circuit can be incorporated in various wireless receiver, also can be individually present；
Its function mode can be found in previous embodiment, repeats no more.
Another specific embodiment according to the present invention is a kind of signal processing being applied to wireless signal receiver
Method, its flowchart is illustrated in Fig. 2.The method is first carried out step S21: receive a wireless signal.
Then, the method performs step S22: make this automatic growth control module adjust this according to a yield value wireless
One amplitude of signal, to produce signal after an adjustment.Subsequently, the method performs step S23: measure this tune
One signal intensity of whole rear signal.After this adjustment, signal is also decoded in step S24.Step S25 is for sentencing
Whether this decoded signal disconnected is corresponding to the one or more beacon packages sent from a transmission end.If step
The judged result of S25 is yes, and the method performs step S26: adjust according to the signal intensity that step S23 produces
This yield value whole.Relatively, if the judged result of step S25 is no, this flow process comes back to step S21.
In practice, step S21～S26 can be periodically repeated execution.Additionally, previously introducing wireless communication
The various circuit operations change described during number receptor 100 also can be applied to the signal processing side depicted in Fig. 2
In method, its details repeats no more.
As it has been described above, the present invention proposes a kind of automatic gain control circuit, one comprises automatic growth control electricity
The wireless signal receiver on road, and its signal processing method.Automatic gain control circuit according to the present invention,
The beacon package that receptor and signal processing method utilize transmission end to send determines a gain initial value, for automatically
Gain control circuit uses.This way contributes to shortening automatic growth control module subsequently for same wireless
The package that memory access sends finds the time required for appropriate gain value.Idea of the invention can be widely used in
Various have transmission beacon package or the wireless telecommunication system of similar reference signal, not to meet 802.11n communication
The wireless telecommunication system of agreement is limited.
By the above detailed description of preferred embodiments, be intended to more to clearly describe inventive feature with
Spirit, and not with above-mentioned disclosed preferred embodiment, the scope of the present invention is any limitation as.Phase
Instead, its objective is to wish to contain various change and tool equality is arranged in the power that the present invention to be applied for
In the range of profit claim.
Claims (15)
1. automatic growth control (AGC) circuit for dynamic adjustment yield value, in order to adjust a wireless signal
One amplitude of the wireless signal that receptor receives, comprises:
One automatic growth control module, in order to adjust this amplitude of this wireless signal, to produce according to a yield value
Signal after a raw adjustment；
One measurement module, in order to measure a signal intensity of signal after this adjustment；
One decoder module, in order to decode signal after this adjustment；And
One control module, after this decoder module judges this adjustment, signal corresponds to from a transmission end transmission
During one beacon package, according to this signal intensity, this control module determines that an initial yield value is for this automatic gain control
Molding block uses, and when receiving new wireless signal from this transmission end subsequently, this control module initially increases from this
Benefit value starts dynamically to adjust the yield value of this automatic growth control module.
2. automatic gain control circuit as claimed in claim 1, it is characterised in that this measurement module is surveyed
Measure a signal mean intensity in a preset period of time after this adjustment, as this signal intensity.
3. automatic gain control circuit as claimed in claim 2, it is characterised in that this measurement module profit
This mean intensity is calculated by an index rolling average program.
4. automatic gain control circuit as claimed in claim 1, it is characterised in that this transmission end is week
Phase property ground sends this beacon package, and this control module is periodically to adjust this gain according to this signal intensity
Value.
5. automatic gain control circuit as claimed in claim 4, it is characterised in that if this decoder module
Not solving any package in one presets reset stage, this yield value is reset to one and presets increasing by this control module
Benefit value.
6. a wireless signal receiver, comprises:
One receiver module, in order to receive a wireless signal；
One automatic growth control module, in order to adjust an amplitude of this wireless signal, to produce according to a yield value
Signal after a raw adjustment；
One measurement module, in order to measure a signal intensity of signal after this adjustment；
One decoder module, in order to decode signal after this adjustment；And
One control module, after this decoder module judges this adjustment, signal corresponds to from a transmission end transmission
During one beacon package, according to this signal intensity, this control module determines that an initial yield value is for this automatic gain control
Molding block uses, and when receiving new wireless signal from this transmission end subsequently, this control module initially increases from this
Benefit value starts dynamically to adjust the yield value of this automatic growth control module.
7. wireless signal receiver as claimed in claim 6, it is characterised in that this measurement module is measured
A signal mean intensity in a preset period of time after this adjustment, as this signal intensity.
8. wireless signal receiver as claimed in claim 7, it is characterised in that this measurement module utilizes
One index rolling average program calculates this mean intensity.
9. wireless signal receiver as claimed in claim 6, it is characterised in that this transmission end is the cycle
Property ground send this beacon package, and this control module is periodically to adjust this yield value according to this signal intensity.
10. wireless signal receiver as claimed in claim 9, it is characterised in that if this decoder module in
One preset reset stage in do not solve any package, this yield value is reset to a preset gain by this control module
Value.
11. 1 kinds of signal processing methods being applied to a wireless signal receiver, this wireless signal receiver bag
Containing an automatic growth control module, this signal processing method comprises:
A () receives a wireless signal；
B () makes this automatic growth control module adjust an amplitude of this wireless signal according to a yield value, to produce
Signal after one adjustment；
C () measures a signal intensity of signal after this adjustment；
D () decodes signal after this adjustment, to produce a decoded signal；And
(e) when this decoded signal be judged as corresponding to from one transmission end send a beacon package time, according to
This signal intensity adjusts this yield value and determines that an initial yield value is for this automatic growth control module；
And when receiving new wireless signal from this transmission end subsequently, this automatic growth control module is initial from this
Yield value starts dynamically to adjust the yield value of this automatic growth control module.
12. signal processing methods as claimed in claim 11, it is characterised in that step (c) comprises measurement should
A signal mean intensity in a preset period of time after adjustment, as this signal intensity.
13. signal processing methods as claimed in claim 12, it is characterised in that step (c) comprises and utilizes one
Index rolling average program calculates this mean intensity.
14. signal processing methods as claimed in claim 11, comprise further:
Periodically adjust this yield value according to this signal intensity.
15. signal processing methods as claimed in claim 14, comprise further:
If this wireless signal receiver does not solves any package in one presets reset stage, by this yield value weight
It is set to a preset gain value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145037.9A CN104124986B (en) | 2013-04-24 | 2013-04-24 | Wireless signal receiver and signal processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310145037.9A CN104124986B (en) | 2013-04-24 | 2013-04-24 | Wireless signal receiver and signal processing method thereof |
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| CN104124986A CN104124986A (en) | 2014-10-29 |
| CN104124986B true CN104124986B (en) | 2016-12-28 |
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| CN201310145037.9A Expired - Fee Related CN104124986B (en) | 2013-04-24 | 2013-04-24 | Wireless signal receiver and signal processing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512558A (en) * | 2017-02-24 | 2018-09-07 | 瑞昱半导体股份有限公司 | The processing method and wireless device of wireless signal |
| CN108882351B (en) * | 2017-05-15 | 2021-09-14 | 瑞昱半导体股份有限公司 | Gain adjustment method for wireless communication |
| CN110391834B (en) * | 2019-07-22 | 2021-10-29 | 展讯通信（上海）有限公司 | Gain adjustment method, device, relay device and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101107826A (en) * | 2004-09-27 | 2008-01-16 | 娜维尼网络技术公司 | Receiver gain control using a pilot signal |
| CN101447803A (en) * | 2007-11-27 | 2009-06-03 | 北京六合万通微电子技术股份有限公司 | Method for estimating signal intensity of EOC system terminal receiver |
-
2013
- 2013-04-24 CN CN201310145037.9A patent/CN104124986B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101107826A (en) * | 2004-09-27 | 2008-01-16 | 娜维尼网络技术公司 | Receiver gain control using a pilot signal |
| CN101447803A (en) * | 2007-11-27 | 2009-06-03 | 北京六合万通微电子技术股份有限公司 | Method for estimating signal intensity of EOC system terminal receiver |
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