KR20020078925A - Bts test unit capable of analyzing spectrum - Google Patents

Abstract

PURPOSE: A BTS(Base Transceiver System) test unit capable of spectrum analysis is provided to embody an antenna diagnosis function, a detection function of a forward/reverse transmitting/receiving power, and a waveform analysis function of an RF(Radio Frequency) transmitting/receiving signal. CONSTITUTION: The first 2:1 switch(210) receives RF transmission signals of a front terminal of a path-classified front end unit collected by a plurality of transmission-side switches(103), the first splitter(106), and the first switch(104), and provides the received RF transmission signals to a forward transmission power detecting unit(110) and a transmission-side spectrum analyzer(220). The transmission-side spectrum analyzer(220) receives the RF transmission signals, analyzes waveforms of the received RF transmission signals, converts the RF transmission signals into digital signals, and performs the graphic process of the digital signals. The second 2:1 switch(230) receives RF reception signals detected in a rear terminal of sector-classified front end unit from the fourth splitter(113), and provides the received RF reception signals to an inverse reception power detecting unit(114) and a reception-side spectrum analyzing unit(240). The reception-side spectrum analyzing unit(240) receives the RF reception signals, analyzes waveforms of the received RF reception signals, converts the RF reception signals into digital signals, and performs the graphic process of the digital signals. A spectrum display unit(250) receives the result value about the waveform analysis of the RF transmission signals or receives result value about the waveform analysis of the RF reception signals, and displays the waveforms of the RF transmission signals or the RF reception signals to an operator.

Description

BTS TEST UNIT CAPABLE OF ANALYZING SPECTRUM}

The present invention relates to a base station test apparatus capable of spectrum analysis, and more particularly, to an antenna diagnosis function and a detection function of forward / reverse transmit / receive power, as well as RF (Radio) by FA / sector / path. Frequency) The present invention relates to a base station test apparatus capable of spectrum analysis, which analyzes a waveform of a transmission / reception signal and displays the result to an operator.

In general, the base station 1 needs a base station test unit (BTU: BTS Test Unit) that reports the status monitoring and test results of the base station 1 itself to the basestation manager (BSM) 2, where the base station test unit 1 is located in the middle of the rack structure of the base station 1 as shown in FIG.

However, the conventional base station test unit connects the transmit / receive input / output ports with an RF cable to monitor the state of the base station itself, diagnose the state of the antenna, and detect the forward / reverse transmit / receive power and report it to the BSM. There was a function of TPTL (Transmitter Power Tracing Loop), but there was no function of analyzing the waveform of RF transmit / receive signal and displaying it to the operator.

Therefore, in the related art, when the operator wants to analyze the waveform of the RF transmission / reception signal, the user has to observe each RF input / output port with a separate spectrum analyzer or install a separate rack implementing the spectrum analysis unit. In this case, there is a problem in that space limitation of rack installation occurs along with an increase in costs due to the installation of a separate rack and equipment.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide an operator with an antenna diagnostic function and a forward / reverse transmit / receive power detection function as well as a waveform analysis function of an RF transmit / receive signal. It is to provide a built-in base station test apparatus.

In order to achieve the above object, a base station test apparatus capable of spectrum analysis according to the present invention includes a main control unit, an auxiliary control unit, a plurality of transmission side switches, a first switch, a second switch, a plurality of first splitters, and a plurality of second splitters. A base station test apparatus comprising an antenna diagnostic signal generator, a third splitter, a forward transmit power detector, a reverse transmit power detector, a plurality of receive switches, a fourth splitter, and a reverse receive power detector,

A plurality of transmitting side switches connected to the front end of the front end unit for each pass of the sector, and the RF transmission signals of the front end unit front end F for each pass of the sector collected by the first splitter and the first switch, a A first 2: 1 switch configured to receive an input through a terminal and then switch the c-terminal and the forward transmission power detector connected to the b terminal;

The RF transmission signals of the front-end unit front end F of each sector of the sector are input from the c terminal of the first 2: 1 switch, and at the same time, the waveforms of the RF transmission signals are analyzed, converted into digital signals, and then graphically processed. A transmitting spectrum analyzer for outputting;

A second 2: 1 switch for receiving an RF reception signal detected at a rear end of each sector front end unit from the fourth splitter and then switching to the reverse reception power detection unit and the f terminal connected to the e terminal;

After receiving the RF reception signals of the rear end R of the front end unit for each pass of the sector from the f terminal of the second 2: 1 switch, the waveforms of the RF reception signals are analyzed, converted into digital signals, and then graphically processed. A receiving spectrum analyzer for outputting; And

Receive a result value for the waveform analysis of the RF transmission signal for each pass of the sector from the transmitting spectrum analyzer, or input the result value for the waveform analysis of the RF received signal for each path of the sector from the receiving spectrum analyzer When received, it is characterized in that the configuration of the spectrum display unit for displaying the waveform of the RF transmission signal or the RF reception signal to the operator.

1 is a diagram of a base station rack structure showing a location of a base station test unit (BTU) in a typical mobile communication system;

2 is a functional block diagram showing the configuration of a base station test apparatus capable of spectrum analysis according to an embodiment of the present invention;

3 is a functional block diagram illustrating an internal configuration of a transmission spectrum analyzer in a base station test apparatus capable of spectrum analysis according to FIG. 2;

4 is a functional block diagram illustrating an internal configuration of a receiving spectrum analyzer in a base station test apparatus capable of spectrum analysis according to FIG. 2.

<Explanation of symbols for the main parts of the drawings>

101: main control unit 102: auxiliary control unit

103: transmitting side switch 104: first switch

105: second switch 106: first splitter

107: second splitter 108: antenna diagnostic signal generator

109: third splitter 110: forward transmission power detector

111: reverse transmission power detector 112: receiving side switch

113: fourth splitter 114: reverse receive power detection unit

210: first 2: 1 switch 220: transmitting side spectrum analyzer

221: PLL 222: Mixer

223: bandpass filter 224: digital signal processing unit

225: graphics processing unit 230: second 2: 1 switch

240: spectrum analysis unit on the receiving side 241: PLL

242 mixer 243 bandpass filter

244: digital signal processing unit 245: graphic processing unit

250: spectrum display unit

Hereinafter, a base station test apparatus capable of spectrum analysis according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The base station applied to the present embodiment includes three sectors (α, β, and γ) per sector. As a base station having two passes (A and B), six front end units (FEUs) are required.

2 is a functional block diagram of a base station test apparatus capable of spectrum analysis according to an embodiment of the present invention. The base station test apparatus capable of spectrum analysis according to an embodiment of the present invention includes a main control unit 101 and an auxiliary control unit 102. ), A plurality of transmitting side switches 103, a first switch 104, a second switch 105, a plurality of first splitters 106, a plurality of second splitters 107, an antenna Diagnostic signal generator 108, third splitter 109, forward transmit power detector 110, reverse transmit power detector 111, multiple receive side switches 112, fourth splitter 113, reverse receive power The detector 114, the first 2: 1 switch 210, the transmit spectrum analyzer 220, the second 2: 1 switch 230, the receiver spectrum analyzer 240, and the spectrum display 250. Consists of

The main controller 101 outputs various switching control signals to the auxiliary control unit 102 to perform various switching control operations and to perform a base station test control operation.

In addition, when the auxiliary control unit 102 receives a switching control signal from the main control unit 101, the auxiliary control unit 102 performs switching control of each switch 103, 104, 105, 112, 113, 210, 230, and the desired sector / path. It serves to detect the signals in front and rear of the front end unit.

On the other hand, the plurality of transmitting side switches 103 are connected to the front and rear ends F or R of the front end unit for each path A or B of the sector α or β, respectively, Front and rear RF transmission signals TxF_A (α), TxF_B (α), TxR_A (α), TxR_B (α), TxF_A (β), TxF_B (β), TxR_A (β) TxR_B ([beta]), TxF_A ([gamma]), TxF_B ([gamma]), TxR_A ([gamma]), and TxR_B ([gamma]) are switched for each pass and pass to the splitters 106 and 107 connected to each other.

In addition, the first switch 104 binds the output signals of the transmission side switches 103 connected to the front end of the front end unit of each path of the sector under the control of the auxiliary control unit 102 into one output path. It passes through the first 2: 1 switch 210.

On the other hand, the second switch 105 binds the output signals of the transmission side switches 103 connected to the rear end of the front end unit for each path of the sector under the control of the auxiliary control unit 102 into one output path. Passes the reverse transmission power detector 111.

Further, the plurality of first splitters 106 transmits the output signals of the transmitting side switches 103 connected to the front end of the sector-specific front end unit under the control of the auxiliary control unit 102 to the first switch 104. Each has a role to pass.

On the other hand, the plurality of second splitters 107 transmits the output signals of the transmission-side switches 103 connected to the rear ends of the sector-specific front end units under the control of the auxiliary control unit 102 to the second switch 105. On the other hand, it passes the antenna diagnostic signal output from the antenna diagnostic signal generator 108 to the transmitting side switch 103 connected to the antenna diagnostic signal.

In addition, the antenna diagnostic signal generator 108 may generate an antenna diagnostic signal to the third splitter 109 under the control of the auxiliary control unit 102.

Meanwhile, the third splitter 109 distributes the antenna diagnostic signal to the plurality of second splitters 107 when the antenna diagnostic signal is input from the antenna diagnostic signal generator 108.

In addition, the forward transmission power detection unit 110 receives an RF transmission signal detected at the front end of each sector front end unit from the first 2: 1 switch 210, detects the forward power of the RF transmission signal, and Notifies the main control unit 101 of the result value through the auxiliary control unit 102.

On the other hand, when the reverse transmission power detector 111 receives the RF transmission signal detected at the rear end of the sector-specific front end unit from the second switch 105, the reverse transmission power detection unit 111 detects the reverse power of the RF transmission signal and returns the result value. It serves to notify the main control unit 101 through the auxiliary control unit 102.

In addition, the plurality of receiving side switches 112 are respectively connected to the rear ends of the front end units for each sector, and under the control of the auxiliary control unit 102, the rear end RF reception signals RxR_A (α), RxR_B ([alpha]), RxR_A ([beta]), RxR_B ([beta]), RxR_A ([gamma]), and RxR_B ([gamma]) switch by paths to pass through the third switch 113.

On the other hand, the fourth splitter 113 serves to pass the output signal of the receiving switch 112 connected to the rear end of each front-end unit for each sector under one control path under the control of the auxiliary control unit 102. do.

In addition, when the reverse reception power detector 114 receives the RF reception signal detected at the rear end of the sector-specific front end unit from the second 2: 1 switch 230, the reverse reception power detection unit 114 detects the reverse power of the RF reception signal. Notifies the main control unit 101 of the result value through the auxiliary control unit 102.

On the other hand, the first 2: 1 switch 210 is a plurality of transmitting side switch 103 and the first splitter 106 and the first switch 104 respectively connected to the front end of the front end unit for each path of the sector After receiving RF transmission signals of the front end unit F for each pass of the sector collected by the terminal through the a terminal, the forward transmission power detector 110 connected to the b terminal and the transmission connected to the c terminal It serves to switch to the side spectrum analyzer 220.

In addition, the transmitting spectrum analyzer 220 receives RF transmission signals of the front end unit F for each path of the sector from the c terminal of the first 2: 1 switch 210 and simultaneously transmits the RF transmission signals. The waveforms of the signals are analyzed, converted into digital signals, and then graphically processed and output to the spectrum display unit 250, which is referred to as a phase locked loop (PLL) as shown in FIG. 221, a mixer 222, a band pass filter 223, a digital signal processor 224, and a graphics processor 225.

At this time, the PLL 221 mounted in the transmission spectrum analyzer 220 generates a local frequency to the mixer 222.

In addition, the mixer 222 mounted in the transmission spectrum analyzer 220 may transmit RF signals of the front end unit F of each front end unit of the sector received from the c terminal of the 2: 1 switch 210. And the local frequency of the PLL 221 is mixed to down convert.

Meanwhile, the bandpass filter 223 mounted in the transmission spectrum analyzer 220 receives the RF transmission signals of the front end unit front end F of each path of the down-converted sector through the mixer 222. It then serves to pass only the desired band.

In addition, the digital signal processing unit 224 mounted in the transmission spectrum analyzer 220 receives and receives the RF transmission signals of the front end unit front end F for each pass of the sector from the bandpass filter 223. To convert it into a digital signal.

The graphic processor 225 mounted in the transmission spectrum analyzer 220 receives the RF transmission signals converted into the digital signal by the digital signal processor 224 and then graphically processes the spectrum display unit 250. It prints in).

On the other hand, the second 2: 1 switch 230 receives the RF received signal detected at the rear end of each sector front end unit from the fourth splitter 113, and then the reverse received power detector connected to the e terminal ( 114) and the reception spectrum analyzer 240 connected to the terminal f.

In addition, the receiving spectrum analyzer 240 receives RF received signals of the front end unit R for each pass of the sector from the f terminal of the second 2: 1 switch 230, and then receives the RF received signals. Analyze the waveforms of the signals, convert them into digital signals, and then process the graphics and output them to the spectrum display unit 250. This is illustrated in FIG. 4, which includes a PLL 241, a mixer 242, and a bandpass filter. 243, a digital signal processor 244, and a graphics processor 245.

At this time, the PLL 241 mounted in the receiving spectrum analyzer 240 generates a local frequency to the mixer 242.

In addition, the mixer 242 mounted in the spectrum analyzer 240 receives the RF of the front end unit R of each front end unit of each sector of the sector received from the f terminal of the second 2: 1 switch 230. Down-converts by mixing signals and the local frequency of the PLL 241.

Meanwhile, the bandpass filter 243 mounted in the spectrum analyzer 240 receives the RF reception signals of the rear end unit R of each front end unit of the down-converted sector through the mixer 242. It then serves to pass only the desired band.

In addition, the digital signal processing unit 244 mounted in the receiving spectrum analyzer 240 receives and receives the RF received signals of the front end unit R of each front end unit of each sector from the bandpass filter 243. To convert it into a digital signal.

The graphic processor 245 mounted in the spectrum analyzer 240 receives the RF received signals converted into digital signals by the digital signal processor 244 and then graphically processes the spectrum display 250. It prints in).

On the other hand, the spectrum display unit 250 receives a result of the waveform analysis of the RF transmission signal for each path of the sector from the transmission spectrum analyzer 220, or the sector from the spectrum analyzer 240 When receiving a result of the waveform analysis of the RF reception signal for each pass of the, it serves to display the waveform of the RF transmission signal or the RF reception signal to the operator.

Then, the operation of the base station test apparatus capable of spectrum analysis according to an embodiment of the present invention having the configuration described above will be described with reference to the accompanying drawings, and a forward / reverse transmit / receive power detection process and an antenna check process Since the same as the conventional one will be omitted.

First, the operator selects the front / rear of the desired sector, path, and front end unit, and inputs the same to the main controller 101 together with the spectrum analysis command.

Then, the main control unit 101 outputs a switching control signal suitable for the path selected by the operator to the auxiliary control unit 102 together with the spectrum analysis command.

Meanwhile, when the auxiliary control unit 102 receives a switching control signal from the main control unit 101, the auxiliary control unit 102 performs switching control of each switch 103, 104, 105, 112, 113, 210, and 230, and a sector desired by an operator. The front and rear ends of the / pass / front end unit are controlled to be input to the transmission / reception side spectrum analyzer 220 or 240.

Then, the switches 103, 104, 105, 112, 113, 210, 230 and the splitters 106, 107, 109, 114 are used for the front and rear ends of the sector, path and front end unit desired by the operator. A transmit / receive RF signal is input to the transmit / receive side spectrum analyzer 220 or 240.

On the other hand, the transmission / reception side spectrum analyzer 220, 240 by the various switches (103, 104, 105, 112, 113, 210, 230) and various splitters (106, 107, 109, 114,) When the transmit / receive RF signals of front and rear ends of the desired sector, path, and front end unit are respectively input, the spectrum display unit 250 analyzes the waveforms of the RF transmit / receive signals, converts them into digital signals, and then processes them graphically. Will be printed respectively. At this time, the detailed operation process of the transmission / reception side spectrum analyzer 220, 240 will be omitted because it has already been described in the above-described role.

Then, the spectrum display unit 250 receives a result of the waveform analysis of the RF transmission signal for each pass of the sector from the transmission spectrum analyzer 220 or the sector from the spectrum analyzer 240 of the receiver. When the result of the waveform analysis of the RF received signal for each pass is received, the operator displays the waveform of the RF transmitted signal or the RF received signal.

Therefore, the operator checks the state of the RF transmission signal or the RF reception signal while viewing the waveform of the RF transmission signal or the RF reception signal displayed through the spectrum display unit 250.

As described above, according to the base station test apparatus capable of spectrum analysis according to the present invention, the antenna diagnosis function and forward / reverse transmit / receive power detection function as well as the waveform analysis function of the RF transmit / receive signal are incorporated in the base station test unit. In addition, when the operator wants to analyze the waveform of the RF transmit / receive signal, the user does not have to use a separate spectrum analysis equipment, which can solve the problem of space limitation and cost increase due to the separate rack installation. .

Claims (3)

A main control unit, an auxiliary control unit, a plurality of transmission side switches, a first switch, a second switch, a plurality of first splitters, a plurality of second splitters, an antenna diagnostic signal generator, a third splitter, a forward transmission power detector, a reverse transmission power A base station test apparatus including a detector, a plurality of receiver switches, a fourth splitter, and a reverse reception power detector, A plurality of transmitting side switches connected to the front end of the front end unit for each pass of the sector, and the RF transmission signals of the front end unit front end F for each pass of the sector collected by the first splitter and the first switch, a A first 2: 1 switch configured to receive an input through a terminal and then switch the c-terminal and the forward transmission power detector connected to the b terminal; The RF transmission signals of the front-end unit front end F of each sector of the sector are input from the c terminal of the first 2: 1 switch, and at the same time, the waveforms of the RF transmission signals are analyzed, converted into digital signals, and then graphically processed. A transmitting spectrum analyzer for outputting; A second 2: 1 switch for receiving an RF reception signal detected at a rear end of each sector front end unit from the fourth splitter and then switching to the reverse reception power detection unit and the f terminal connected to the e terminal; After receiving the RF reception signals of the rear end R of the front end unit for each path of the sector from the f terminal of the second 2: 1 switch, the waveforms of the RF reception signals are analyzed, converted into digital signals, and then graphic processed. A receiving spectrum analyzer for outputting; And Receive a result value for the waveform analysis of the RF transmission signal for each pass of the sector from the transmitting spectrum analyzer, or input the result value for the waveform analysis of the RF received signal for each path of the sector from the receiving spectrum analyzer And a spectrum display unit configured to display a waveform of the RF transmission signal or the RF reception signal to an operator when receiving. The method of claim 1, The transmission spectrum analyzer comprises: a PLL for generating a local frequency; A mixer configured to down-convert the RF transmission signals of the front end unit (F) of each sector of the sector received from the c terminal of the 2: 1 switch and the local frequency of the PLL; A bandpass filter which receives only RF transmission signals of the front end unit front end (F) for each pass of the down-converted sector through the mixer and passes only a desired band; A digital signal processing unit which receives the RF transmission signals of the front end unit F for each pass of the sector from the bandpass filter and then converts them into digital signals; And And a graphic processing unit configured to receive the RF transmission signals converted into digital signals by the digital signal processing unit and to perform graphic processing and output the graphic to the spectrum display unit. The method of claim 1, The receiving spectrum analyzer comprises: a PLL for generating a local frequency; A mixer configured to down-convert the RF received signals of the front end unit (R) of the front end unit (R) of each sector of the sector switched by the second 2: 1 switch and the local frequency of the PLL; A bandpass filter which receives only RF reception signals of the front end unit R of each front end unit of each down-converted sector through the mixer and passes only a desired band; A digital signal processor for receiving the RF received signals of the front end unit (R) of each pass of the sector from the bandpass filter and sampling the converted RF signals into digital signals; And And a graphic processing unit configured to receive the RF reception signals converted into digital signals by the digital signal processing unit and to perform graphic processing and output the graphic to the spectrum display unit.