KR20000041345A - Receiver of radio porter in wireless local loop - Google Patents

Abstract

PURPOSE: A receiver of Radio Porter in Wireless Local Loop is provided to change shape of 2FA of RP RF part by using Front-End-Unit, has duplexer, unifies RP transmission group and receipt group of WLL. CONSTITUTION: A receiver of RP(Radio Porter) in WLL(Wireless Local Loop) comprises the steps of: a first and a second DISU(Distribute Switching Unit)(30,40) receives 6 from each FA, and distributes 8, if a duplexer sends or receives signals via an antenna; a DCC(Down Converter Card)(20) modulates RF signals of a first and a second DISU(30,40) into IF signals, and transmits them to the DISUs(30, 40); a first and a second ACSU(35,45) modulate signals of the DISUs(30,40) into digital signals, and transmit them to the DISUs(30,40); a UCC(50) modulates IF signal, inputted from the DISUs, into RF signal; an HPA(70) amplifies signals by appointed level; the signals are classified by sectors and redundancies, and transmitted to a duplexer FEU(10,11,12).

Description

Base station receiver in wireless subscriber network

The present invention relates to a wireless subscriber network (WLL), and in particular, by using a front-end-unit (FEU) incorporating a duplexer to integrate the base station transmitter and receiver of the wireless subscriber network so that the shape of the RP RF unit can be changed to 2FA. The present invention relates to a base station receiver of a wireless subscriber network.

The current wireless subscriber network base station is based on a 1FA / 3 sector shape. Recently, since a communication is allocated a frequency of 20 MHz, a shape change to 2FA (10 MHz + 10 MHz) is required.

Figure 1 shows a conventional WLL RP 1FA configuration, 1FA / 3 sector RF block is received by the RXF unit 1 and the RXF unit 1 composed of a plurality of RXF to receive the signal received through the antenna A down converter unit (2) consisting of a plurality of down converters for converting the frequency into an IF signal of 38.4 MHz, a clock distribution unit (CDU) 3 connected to the down converter 2 for distributing a clock, and DISU (Distrubute Switching Unut) 4 for switching signals from RXF unit 1 and DCC unit 2, ACSU 5 for receiving IF 38.4 MHz signal by receiving the signal from DISU 4 and The UCC unit 6 converts the IF 38.4 MHz signal from the ACSU 5 into a UHF signal and adjusts the signal level to a desired signal level in a flow attenuator. HPA unit 7 for amplifying and outputting power, and receiving power from the HPA unit 7 to transmit a signal through an antenna. Is composed of the TXF unit 8, and reference numeral 9 in the figure is a switch connected to the output terminal of the HPA unit 7.

In the conventional configuration configured as described above, the signal received through the antenna is amplified by the low noise amplifier after band pass through the RXF unit 1, which is a receiving end, and converted into an IF signal of 38.4 MHz through the DCC unit 2.

In addition, the 38.4 MHz IF signal thus converted is supplied to the ACSU 5 of the digital shelf at a constant level through the DISU 4.

The IF 38.4 MHz signal from the ACSU 5 is converted into a UHF signal by the UCC unit 6, adjusted to a desired signal level by a flow attenuator, and supplied to the HPA unit 7 to be amplified by a high power. And through the antenna through the TXF (8).

However, in such a conventional configuration, the RXF unit 1 and the TXT TX unit 8 of the receiving end are separately formed, which results in a complicated structure and a cost increase.

In addition, the base station is expanded due to an increase in FA according to the frequency allocated to 20MHz, and there is a problem in that units or parts are repeatedly used.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide a radio with a new FEU integrating the RXF, which is a receiver, and the TXF, which is a transmitter, using a duplexer and a coupler. The present invention provides a base station receiver of a subscriber network.

1 is a block diagram of a conventional radio subscriber network RP RF 1FA

2 is a block diagram of RP RXF 2FA of a wireless subscriber network according to the present invention

<Explanation of symbols for main parts of drawing>

10-12: Duplexer 13-15: RXF

20: DCC part 30: First DISU

35: 1st ACSU 40: 2nd DISU

45: 2nd ACSU 50: UCC part

60: CDU 70: HPA part

80: coupling part 90: switching part

In order to achieve the above object, the present invention provides a plurality of duplexers for receiving or transmitting a signal through an antenna, a plurality of RXFs for receiving a signal through an antenna, and receiving 6 signals per 1FA from the signals of the duplexer and RXF. The first and second DISUs distributed to the dog, the DCC unit converts the RF signals of the first and second DISUs into IF signals, and sends the first and second DISUs to the first and second DISUs, and digitally converts the signals of the first and second DISUs. Supplying the first and second ACSUs to the first and second DISUs, the UCC unit converting IF signals input from the first and second DISUs into RF signals, and a 10 MHz clock to the DCC unit and the UCC unit. A CDU to be connected to an output terminal of the UCC unit, an HPA unit for amplifying a signal to a predetermined level, a coupling unit for integrating the signal amplified by the HPA unit for each sector and redundancy, and for each sector from the combining unit. Input to duplexer FEU with three paths, one each Characterized in that it comprises a switching unit to.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of an exemplary embodiment of the present invention, in which an RF signal is applied to an output terminal of the first to third duplexers 10-12 and the first to third RXFs 13-15, which are duplexer FEUs for receiving or transmitting a signal through an antenna. A DCC unit 20 made of a plurality of DCCs for converting into an IF signal is connected.

Here, three RXFs and three TXFs of the existing six RXFs and three TXFs are integrated into a duplexer, and thus, the first to third RXFs (10-12) and the remaining first to third RXFs (13-13) remain unintegrated. 15).

In addition, the first DISU 30 and the second DISU 40, which receive 6 pieces per 1FA at the output terminals of the duplexer 10-12 and the RXF unit 13-15, distribute them to the DCC unit 20. The first and second ACSUs 35 and 45 are connected to convert the signals of the first DISU 30 and the second DISU 40 into digital signals and send them back to the first DISU 30 and the second DISU 40. do.

In addition, a UCC unit 50 for converting IF signals input from the first DISU 30 and the second DISU 40 into RF signals is provided between the DCC unit 20 and the UCC unit 50. The CDU 60 which supplies a clock of 10 MHz is connected.

The output section of the UCC unit 50 has a four-channel combiner for integrating the signal amplified by the HPA unit 70 by sector and redundancy through the HPA unit 70 which amplifies the signal to a predetermined level ( 80) is connected.

In addition, the output unit of the coupling unit 80 is configured by connecting a switching unit 90 that sends output to the first duplexer FEU in three paths, one for each sector.

Referring to the operation of the present invention configured as described in detail as follows.

That is, the signal input through the antenna is input to the DCC unit 20 through low noise amplification and band pass through the first to third RXFs 13-15, from which the first to third RXFs 13-15 are input. There are two outputs.

Then, the DCC unit 20 converts the input signal into an IF frequency of 38.4 MHz and sends it to the first DISU 30. The first DISU 30 receives six inputs per 1FA and distributes the signal to eight.

In addition, the signal thus distributed is converted into a digital signal while passing through the first ACSU 35, and again demodulated into an RF signal while passing through the digital rack and input again to the UCC unit 50 via the first DISU 30.

At this time, a clock of 10 MHz is supplied from the CDU 60 to the DCC unit 20 and the UCC unit 50.

Here, in the case of 2FA, since 1FA + 1FA, in the case of 2FA, the same operation is performed through the first DISU 30 and the first ACSU 35 and also through the second DISU 40 and the second ACSU 45. .

In other words, one of two first to third RXF (13-15) output signal paths is sent to the DCC unit 20, and one is sent to the first and second DISUs 30 and 40, and the first and second DISUs ( Unlike control of downconverter redundancy through switch switching in (40), one of the two receive diversity is connected to two receive outputs from the transmit bandpass filter in the first to third duplexers 10-12. Each FA is assigned two FA signal paths.

Both signals are sent to the first and second DISUs 30 and 40 to switch the DCC unit 20 including 6 DCCs (3 sectors x 2FA) and 2 DCC redundancy (1 per FA) through switching switching. Take control.

The remaining part is set to the same first to third RXF (13-15) as before, and only the signal path is set to be the same as the duplexer FEU, and the signal amplified by the HPA unit 70 to the four channel combiners after the same path as before. Through the coupling unit 80, the sectors and the redundancy are integrated and input to the first to third duplexers 10-12 through three switching paths, one for each sector, through the switching unit 90.

At this time, since the transmission part controls one sector per unit of the duplexer, three transmission inputs are received and transmitted to the antenna.

As described above, the present invention provides a 2FA shape of the RP RF unit using a FEU equipped with a duplexer, thereby reducing the cost of reducing base stations due to FA increase, supplementing electrical specifications, and eliminating redundant units or parts. It can be effective.

Claims (1)

A plurality of duplexers 10-12 for receiving or transmitting signals via an antenna, A plurality of RXFs 13-15 for receiving signals via an antenna; First and second DISUs (30) and (40), which receive six from each of the signals of the duplexer and RXF and distribute them to eight; A DCC unit 20 which converts the RF signals of the first and second DISUs into IF signals and sends them to the first and second DISUs; First and second ACSUs 35 and 45 which convert the signals of the first and second DISUs into digital signals and send them to the first and second DISUs; A UCC unit 50 for converting IF signals input from the first and second DISU into RF signals; A CDU 60 for supplying a 10 MHz clock to the DCC unit and the UCC unit; An HPA unit 70 connected to an output terminal of the UCC unit to amplify a signal to a predetermined level; A channel combiner 80 for integrating the signal amplified by the HPA unit by sector and by redundancy; And a switching unit (90) for inputting the duplexer FEU into three paths, one for each sector, from the channel combiner.