CN113556190B - Apparatus for testing performance of communication receiver - Google Patents
Apparatus for testing performance of communication receiver Download PDFInfo
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- CN113556190B CN113556190B CN202110813533.1A CN202110813533A CN113556190B CN 113556190 B CN113556190 B CN 113556190B CN 202110813533 A CN202110813533 A CN 202110813533A CN 113556190 B CN113556190 B CN 113556190B
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 238000004891 communication Methods 0.000 title claims abstract description 35
- 238000012545 processing Methods 0.000 claims abstract description 47
- 238000011056 performance test Methods 0.000 claims abstract description 15
- 125000004122 cyclic group Chemical group 0.000 claims description 20
- 238000012795 verification Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010960 commercial process Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3845—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier
- H04L27/3854—Demodulator circuits; Receiver circuits using non - coherent demodulation, i.e. not using a phase synchronous carrier using a non - coherent carrier, including systems with baseband correction for phase or frequency offset
- H04L27/3872—Compensation for phase rotation in the demodulated signal
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Quality & Reliability (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention discloses a device for testing the performance of a communication receiver. The control console is arranged in the device and is used for configuring waveform parameters of the NR test signal of the new air interface; the signal generating device is used for receiving the waveform parameters and generating NR test signals according to the waveform parameters; the remote radio equipment comprises a radio interface to be tested, and is used for receiving the NR test signal sent by the signal generating equipment through the radio interface to be tested, and processing the NR test signal to obtain a processed signal; the remote radio line concentration device is used for receiving the processed signals sent by the remote radio device and converting the processed signals into frequency domain signals; the console is also used for receiving the frequency domain signal sent by the remote radio line concentration device and determining a performance test result according to the frequency domain signal and the waveform parameter. The radio frequency interface of the receiver is tested by combining a common control console and signal generating equipment in the market, so that the whole set of special testing equipment is avoided, and the testing cost is reduced.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a device for testing the performance of a communication receiver.
Background
The receiving performance of the radio frequency device for wireless communication is an important index for evaluating the overall performance of the communication system, so that the performance test of the radio frequency front end in the research and development and production stages of the communication device is particularly important. Along with the acceleration of the 5G commercial process, the requirement of the 5G base station end also presents a blowout phenomenon, and small base stations, micro base stations, nano base stations, pico base stations and even smaller femto base stations appear in the 5G communication era. Therefore, the performance test of the radio frequency front end of the receiver in the 5G base station is in huge demand.
Currently, when performance testing is performed on the radio frequency front end of a receiver in a 5G base station, expensive dedicated communication testing equipment is generally required, and testing cost is high.
Disclosure of Invention
The invention mainly aims to provide a device for testing the performance of a communication receiver, which aims to solve the problem of higher cost when the performance test is carried out on the radio frequency front end of the receiver in a 5G base station in the prior art.
To achieve the above object, a first aspect of the present invention provides an apparatus for testing performance of a communication receiver, the apparatus for testing performance of a communication receiver comprising:
the console is used for configuring waveform parameters of the new air interface NR test signal;
a signal generating device in communication with the console for receiving the waveform parameters and generating an NR test signal based on the waveform parameters;
the remote radio equipment comprises a radio interface to be tested, and is communicated with the signal generating equipment and used for receiving an NR test signal sent by the signal generating equipment through the radio interface to be tested, performing digital-to-analog conversion and up-conversion processing on the NR test signal to obtain a processed signal;
the remote radio line concentration device is communicated with the remote radio device and is used for receiving the processed signals sent by the remote radio device and converting the processed signals into frequency domain signals;
the console is also communicated with the remote radio line concentration device, and is also used for receiving the frequency domain signal sent by the remote radio line concentration device and determining a performance test result according to the frequency domain signal and the waveform parameter.
In an embodiment of the present invention, the console is further configured to:
determining the error vector amplitude or signal-to-noise ratio of the signal according to the frequency domain signal and the waveform parameters;
and determining a performance test result according to the error vector amplitude or the signal-to-noise ratio.
In an embodiment of the present invention, the console is further configured to:
capturing a frequency domain signal through the TcpDemp to obtain a pcap file;
extracting I/Q data in the pcap file through Wireshark;
the I/Q data is matched with waveform parameters to obtain an error vector magnitude or signal-to-noise ratio of the signal.
In an embodiment of the present invention, a remote radio device includes:
the input end of the first signal processing unit is electrically connected with the radio frequency interface to be tested, and the output end of the first signal processing unit is electrically connected with the first input end of the remote radio concentration device and is used for carrying out digital-to-analog conversion and up-conversion on the NR test signal to obtain a processed signal.
In the embodiment of the invention, the remote radio line concentration device comprises:
and the input end of the second signal processing unit is electrically connected with the output end of the first signal processing unit, and the output end of the second signal processing unit is electrically connected with the console and is used for converting the time domain signal into the frequency domain signal.
In an embodiment of the present invention, the second signal processing unit includes:
the input end of the cyclic prefix removing subunit is electrically connected with the output end of the first signal processing unit;
the input end of the fast Fourier transform subunit is electrically connected with the output end of the cyclic prefix removing subunit;
the input end of the phase post-compensation subunit is electrically connected with the output end of the fast Fourier transform subunit;
and the input end of the subcarrier demapping subunit is electrically connected with the output end of the phase post-compensation subunit, and the output end of the subcarrier demapping subunit is electrically connected with the console.
In the embodiment of the invention, the remote radio line concentration device further comprises: the eCPRI interface, the input end of the cyclic prefix removing subunit, the output end of the fast Fourier transform subunit, the output end of the phase post-compensation subunit and the output end of the subcarrier demapping subunit are electrically connected with the console through the eCPRI interface;
the control console is further configured to perform bit matching verification on the cyclic prefix removing subunit according to the first signal when the first signal transmitted by the input end and the output end of the cyclic prefix removing subunit is received, perform bit matching verification on the fast fourier transform subunit according to the second signal when the second signal transmitted by the output end of the cyclic prefix removing subunit and the output end of the fast fourier transform subunit is received, perform bit matching verification on the phase post-compensation subunit according to the third signal when the third signal transmitted by the output end of the phase post-compensation subunit and the output end of the fast fourier transform subunit is received, and perform bit matching verification on the subcarrier demapping subunit according to the fourth signal when the fourth signal transmitted by the output end of the phase post-compensation subunit and the output end of the subcarrier demapping subunit is received.
In the embodiment of the invention, the remote radio line concentration device further comprises:
the input end of the second signal processing unit is electrically connected with the output end of the first signal processing unit through the first CPRI interface;
and the output end of the second signal processing unit is electrically connected with the console through the second CPRI interface.
In an embodiment of the present invention, the apparatus for testing performance of a communication receiver further includes:
the GPS equipment is used for outputting clock synchronization signals;
the power divider is respectively communicated with the second input ends of the GPS equipment and the remote radio line concentration equipment and the signal generation equipment, and is used for acquiring clock synchronization signals and sending the clock synchronization signals to the remote radio line concentration equipment and the signal generation equipment.
In the embodiment of the invention, the number of the remote radio devices is multiple, and the multiple remote radio devices are respectively and electrically connected with the remote radio line concentration device.
According to the embodiment of the invention, the control console is arranged in the device and used for configuring the waveform parameters of the NR test signal of the new air interface; a signal generating device in communication with the console for receiving the waveform parameters and generating an NR test signal based on the waveform parameters; the remote radio equipment comprises a radio interface to be tested, and is communicated with the signal generating equipment, and is used for receiving an NR test signal sent by the signal generating equipment through the radio interface to be tested, and processing the NR test signal to obtain a processed signal; the remote radio line concentration device is communicated with the remote radio device and is used for receiving the processed signals sent by the remote radio device and converting the processed signals into frequency domain signals; the console is also communicated with the remote radio line concentration device, and is also used for receiving the frequency domain signal sent by the remote radio line concentration device and determining a performance test result according to the frequency domain signal and the waveform parameter. The radio frequency interface of the receiver is tested by combining a common control console and signal generating equipment in the market, so that the whole set of special testing equipment is avoided, and the testing cost is reduced.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a functional block diagram of an apparatus for testing the performance of a communication receiver according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative configuration of the apparatus for testing the performance of a communication receiver of FIG. 1;
fig. 3 is a schematic diagram of another alternative configuration of the apparatus for testing the performance of a communication receiver of fig. 1.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Console | 320 | First signal processing unit |
| 200 | Signal generating device | 410 | Second signal processing unit |
| 300 | Remote radio equipment | 411 | De-cyclic prefix subunit |
| 400 | Radio remote line concentration equipment | 412 | Fast fourier transform subunit |
| 500 | GPS equipment | 413 | Phase post-compensation subunit |
| 600 | Power divider | 414 | Subcarrier demapping subunit |
| 310 | Radio frequency interface |
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The embodiment of the invention provides a device for testing the performance of a communication receiver.
Fig. 1 is a functional block diagram of an apparatus for testing the performance of a communication receiver according to an embodiment of the present invention. Referring to fig. 1, in an embodiment of the present invention, an apparatus for testing performance of a communication receiver may include a console 100 for configuring generation parameters of a new air interface NR test signal; a signal generating device 200 in communication with the console 100 for receiving the generation parameters and generating an NR test signal according to the generation parameters; the remote radio device 300 comprises a radio interface to be tested, the remote radio device 300 is communicated with the signal generating device 200 and is used for receiving an NR test signal sent by the signal generating device 200 through the radio interface to be tested, and processing the NR test signal to obtain a processed signal; the remote radio line concentration device 400 is in communication with the remote radio device 300, and is configured to receive the processed signal sent by the remote radio device 300, and convert the processed signal into a frequency domain signal; the console 100 is further in communication with the remote radio hub device 400, and is further configured to receive a frequency domain signal sent by the remote radio hub device 400, and determine a performance test result according to the frequency domain signal and the generation parameter.
It should be noted that the console 100 may be a computer console 100, such as a notebook computer, a desktop computer, a tablet computer, etc., which is not limited in this embodiment of the present invention.
It will be appreciated that The New Radio (NR) test signal is a 5G NR signal or a free specific configuration signal formulated according to The third generation partnership project (The 3rd Generation Partnership Project,3GPP) standard, by which The performance of The transmitting front end of The receiver can be quickly tested.
In one example, after console 100 has configured the waveform parameters of the NR test signal, the waveform parameters are stored locally and sent to signal generation device 200 via an RJ-45 interface, and signal generation device 200 generates the NR test signal based on the waveform parameters.
In a specific implementation, the remote radio 300 may be provided with one or more to-be-tested radio interfaces 310, when performance testing is required for one of the to-be-tested radio interfaces 310, the to-be-tested radio interfaces 310 are electrically connected with the signal generating device 200, an NR test signal is sent to the to-be-tested radio interfaces 310 by the signal generating device 200, when performance testing is required for the whole remote radio 300, the signal generating device 200 needs to be electrically connected with each to-be-tested radio interface 310 in the remote radio 300 in turn for independent testing, and the performance of each radio interface 310 is determined until all the radio interfaces 310 are tested, and then the performance of the whole remote radio 300 is calculated.
It should be noted that, the remote radio line concentration device 400 is a linking device between the base station and the remote radio device 300, and the remote radio line concentration device 400 may be provided with one or more interfaces electrically connected to the remote radio device 300, so as to implement mounting of one or more remote radio devices 300 on one base station.
In one example, where there are a plurality of remote devices 300, the plurality of remote devices 300 are electrically connected to the remote hub 400, respectively.
After receiving the NR test signal, the remote radio device 300 processes the NR test signal to obtain a processed signal, and sends the processed signal to the remote radio line concentration device 400, where the remote radio line concentration device 400 converts the processed signal into a frequency domain signal and sends the frequency domain signal to the console 100, and the console 100 determines a performance test result according to the locally stored waveform parameter and the received frequency domain signal.
In one example, the console 100 may determine an error vector magnitude or signal-to-noise ratio of the signal from the frequency domain signal and the waveform parameters; and determining a performance test result according to the error vector amplitude or the signal-to-noise ratio.
Specifically, console 100 may grasp the frequency domain signal through TcpDump to obtain a pcap file; extracting I/Q data in the pcap file through Wireshark; the I/Q data is matched with waveform parameters to obtain an error vector magnitude or signal-to-noise ratio of the signal.
In the implementation process, an acquisition unit, an extraction unit and an analysis unit may be set in the console 100, where the acquisition unit captures a frequency domain signal at an optical fiber port electrically connected to the remote radio hub device 400 through a network data acquisition and analysis tool TcpDump to obtain a pcap file, the extraction unit extracts I/Q data in the pcap file through a real-time unpacking procedure of the network packet capture tool Wireshark, and the analysis unit invokes an NR test signal configuring the signal generating device 200, where the console 100 stores a local waveform parameter, matches the waveform parameter with the I/Q data, and outputs an error vector magnitude or a signal-to-noise ratio in real time through operation of the data analysis procedure.
It should be noted that, the pcap file is a common datagram storage format, and the data in the file is stored according to a specific format. I/Q data refers to I (in-phase) and Q (quadrature-phase) values of a signal. The error vector magnitude is the vector difference between the I and Q component in the waveform parameters and the I and Q component magnitudes of the actually received frequency domain signal.
The control console 100 is arranged in the device and is used for configuring the waveform parameters of the NR test signal of the new air interface; a signal generating device 200, in communication with the console 100, for receiving the waveform parameters and generating an NR test signal based on the waveform parameters; the remote radio device 300 comprises a radio interface to be tested, the remote radio device 300 is communicated with the signal generating device 200 and is used for receiving an NR test signal sent by the signal generating device 200 through the radio interface to be tested, and processing the NR test signal to obtain a processed signal; the remote radio line concentration device 400 is in communication with the remote radio device 300, and is configured to receive the processed signal sent by the remote radio device 300, and convert the processed signal into a frequency domain signal; the console 100 is further in communication with the remote radio line concentration device 400, and is further configured to receive a frequency domain signal sent by the remote radio line concentration device 400, and determine a performance test result according to the frequency domain signal and the waveform parameter. By testing the radio frequency interface 310 of the receiver in combination with the more common console 100 and signal generating device 200 on the market, the use of a complete set of dedicated testing equipment is avoided and the testing costs are reduced.
Fig. 2 is a schematic diagram of an alternative configuration of the apparatus for testing the performance of a communication receiver of fig. 1. Referring to fig. 1 and 2, in an embodiment of the present invention, a remote radio 300 may include: the input end of the first signal processing unit 320 is electrically connected with the radio frequency interface 310 to be tested, and the output end of the first signal processing unit 320 is electrically connected with the first input end of the remote radio unit 400, so as to perform digital-to-analog conversion and up-conversion processing on the NR test signal to obtain a processed signal.
Specifically, after receiving the NR test signal transmitted by the radio frequency interface 310 to be tested, the first signal processing unit 320 performs digital-to-analog conversion and up-conversion on the NR test signal to obtain a processed signal.
Further, the remote radio hub device 400 may include: the input end of the second signal processing unit 410 is electrically connected to the output end of the first signal processing unit 320, and the output end of the second signal processing unit 410 is electrically connected to the console 100, for converting the processed signal into a frequency domain signal.
In an embodiment of the present invention, the remote radio hub device 400 may further include: the output terminal of the first signal processing unit 320 is electrically connected to the input terminal of the second signal processing unit 410 through a common public radio interface (Common Public Radio Interface, CPRI interface).
It should be understood that the remote radio hub 400 may include one or more CPRI interfaces, and the remote radio 300 may be electrically connected to any one of the CPRI interfaces, and the remote radio hub 400 may also need to be configured with an interface number to which the remote radio 300 is connected.
In one example, the remote radio hub device 400 may further include: the first enhanced CPRI (eCPRI) interface, and the second signal processing unit 410 is electrically connected to the optical fiber interface of the console 100 through the first eCPRI interface, and transmits a frequency domain signal to the console 100, so that the console 100 evaluates the performance of the radio frequency front end of the receiver according to the frequency domain signal.
In an embodiment of the present invention, the apparatus for testing the performance of a communication receiver may further include a global satellite positioning system (Global Positioning System, GPS) device 500 for outputting a clock synchronization signal; and a power divider 600, which is respectively in communication with the GPS device 500, the second input terminal of the remote radio hub device 400, and the signal generating device 200, and is configured to acquire a clock synchronization signal, and send the clock synchronization signal to the remote radio hub device 400 and the signal generating device 200.
Of course, in order to realize that the remote radio hub device 400 is electrically connected with the power divider 600, a GPS interface needs to be further provided on the remote radio hub device 400, and the power divider 600 communicates with the remote radio hub device 400 through the GPS interface.
It should be understood that the accuracy requirement of clock synchronization of the 5G base station is very high, and the accuracy is required to reach that the air interface time error between base stations is less than ±1.5μs, and when performance test is performed on the radio frequency front end of the receiving side of the 5G base station, the synchronization signals of the receiving and transmitting ends need to be ensured so as to avoid interference of cross time slots.
In the embodiment of the present invention, the 5G base station adopts a satellite synchronization scheme to achieve clock synchronization, and in one example, the clock synchronization signal may be output through the GPS device 500. In another example, the clock synchronization signal may be output through a Beidou satellite. In yet another example, a more accurate clock synchronization signal may be output by dual mode operation of the GPS device 500 and the Beidou satellite, automatic switching.
The power divider is also called a power divider, and is a device for dividing one path of input signal energy into two paths or multiple paths of output equal or unequal energy. Certain isolation should be ensured between the output ports of one power divider. The power divider is generally divided into one-by-two (one input and two output), one-by-three (one input and three output) and the like by output. The main technical parameters of the power divider include power loss (including insertion loss, distribution loss and reflection loss), voltage standing wave ratio of each port, isolation degree, amplitude balance degree, phase balance degree, power capacity, frequency bandwidth and the like among the power distribution ports.
The GPS device 500 is used to realize synchronization between the transceiver ends. In one example, the GPS device 500 may output a 1pps 10mhz signal, where the signal is output to the second input terminal of the remote radio hub device 400 and the signal generating device 200 through the power divider 600, which ensures clock synchronization of the remote radio hub device 400 and the signal generating device 200, and the remote radio hub device 400 synchronizes the signal to the remote radio device 300 through the CPRI interface, so as to achieve synchronization of the remote radio device 300 and the signal generating device 200.
In a specific implementation, the console 100 and the signal generating device 200, the signal generating device 200 and the remote radio device 300, the remote radio device 300 and the remote radio line concentration device 400, the remote radio line concentration device 400 and the console 100, the GPS device 500 and the power divider 600, the power divider 600 and the remote radio line concentration device 400, the power divider 600 and the signal generating device 200 are connected according to fig. 2.
The test flow of the embodiment of the invention is as follows:
the console 100 configures waveform parameters of the NR test signal, transmits the waveform parameters to the signal generating apparatus 200 through the RJ-45 interface, and saves the waveform parameters locally.
The console 100 configures a radio interface 310 to be tested of the remote radio 300.
The signal generating device 200 generates an NR test signal according to the received waveform parameters, and the NR test signal is transmitted to the remote radio 300 via the radio interface 310 to be tested.
The first signal processing unit 320 in the remote radio 300 processes the NR test signal to obtain a processed signal, and sends the processed signal to the remote radio hub 400 through the CPRI interface.
The second signal processing unit 410 in the remote radio hub device 400 converts the processed signal into a frequency domain signal, and transmits the frequency domain signal to the console 100 via the first eCPRI interface.
The console 100 analyzes the received signal to obtain an error vector magnitude or signal-to-noise ratio and determines the performance of the radio frequency interface 310 under test based on the error vector magnitude or signal-to-noise ratio.
The console 100 continues to configure another radio frequency interface 310 to be tested, the signal generating device 200 is electrically connected with the other radio frequency interface 310 to be tested, so as to test the performance of the other radio frequency interface 310 to be tested, until all radio frequency interfaces 310 in the remote radio device 300 are tested, and a performance test result of the whole remote radio device 300 is obtained according to the performance of all radio frequency interfaces 310.
According to the embodiment of the invention, the first signal processing unit 320 is arranged in the remote radio 300, the second signal processing unit 410, the first eCPRI interface and the CPRI interface are arranged in the remote radio concentrating device 400, so that conversion from NR test signals to frequency domain signals is realized, further, the test of the console 100 on the radio interface 310 in the remote radio 300 is realized, and the clock synchronization of the remote radio concentrating device 400, the remote radio 300 and the signal generating device 200 is realized through the arrangement of the GPS device 500 and the power divider 600. Through the scheme, the simple, efficient and practical test of the radio frequency front end performance of the receiver at the 5G base station side is realized, and the scheme does not need a complex test flow and special communication test equipment, so that the test cost is reduced.
Fig. 3 is a schematic diagram of another alternative configuration of the apparatus for testing the performance of a communication receiver of fig. 1. Referring to fig. 1 and 3, in an embodiment of the present invention, the second signal processing unit 410 includes: a cyclic prefix removing subunit 411, wherein an input end of the cyclic prefix removing subunit 411 is electrically connected to an output end of the first signal processing unit 320; a fast fourier transform subunit 412, an input of the fast fourier transform subunit 412 being electrically connected to an output of the de-cyclic prefix subunit 411; a post-phase compensation subunit 413, the input of the post-phase compensation subunit 413 being electrically connected to the output of the fast fourier transform subunit 412; subcarrier demapping subunit 414, an input terminal of subcarrier demapping subunit 414 is electrically connected to an output terminal of post-phase compensation subunit 413, and an output terminal of subcarrier demapping subunit 414 is electrically connected to console 100.
It should be understood that, in the embodiment of the present invention, after the input end of the cyclic prefix removing subunit 411 receives the time domain signal, the operation of removing the cyclic prefix needs to be performed on the received time domain signal, and the signal after removing the cyclic prefix is sent to the input end of the fft subunit 412.
The fft subunit 412 performs fft on the received signal and sends the transformed signal to the input of the post-phase compensation subunit 413.
The post-phase compensation subunit 413 performs phase lag compensation on the received signal, and sends the compensated signal to the input terminal of the subcarrier demapping subunit 414.
The subcarrier demapping subunit 414 inversely maps the received signal to obtain a frequency domain signal, and transmits the frequency domain signal to the console 100 through the first eCPRI interface.
In one example, the remote radio hub device 400 further includes: the input end of the cyclic prefix removing subunit 411, the output end of the fast fourier transform subunit 412, the output end of the phase post-compensation subunit 413 and the output end of the subcarrier demapping subunit 414 are all electrically connected with the optical fiber interface of the console 100 through the second eCPRI interface; the console 100 is further configured to perform, when receiving the first signal sent by the input end and the output end of the cyclic prefix removing subunit 411, bit-match verification on the cyclic prefix removing subunit 411 according to the first signal, perform, when receiving the second signal sent by the output end of the cyclic prefix removing subunit 411 and the output end of the fast fourier transform subunit 412, bit-match verification on the fast fourier transform subunit 412 according to the second signal, perform, when receiving the third signal sent by the output end of the phase post-compensation subunit 413 and the output end of the fast fourier transform subunit 412, bit-match verification on the phase post-compensation subunit 413 according to the third signal, and perform, when receiving the fourth signal sent by the output end of the phase post-compensation subunit 413 and the output end of the subcarrier demapping subunit 414, bit-match verification on the subcarrier demapping subunit 414 according to the fourth signal.
It should be understood that the output of the cyclic prefix removal subunit 411 is the input of the fft subunit 412, the output of the fft subunit 412 is the input of the post-phase compensation subunit 413, and the output of the post-phase compensation subunit 413 is the input of the subcarrier demapping subunit 414.
In a specific implementation, the second eCPRI interface of the remote radio hub device 400 is electrically connected to the optical fiber interface of the console 100, and by configuring registers in the remote radio hub device 400, the input signals and the output signals of each subunit in the second signal processing unit 410 can be respectively obtained, and the console 100 can perform bit matching verification on each subunit according to the input signals and the output signals of each subunit. For example, in the case where Matlab software is installed in the console 100, the Matlab software receives an input signal and an output signal of one of the subunits, determines whether the received input signal and output signal are consistent with related parameters preset in the software, if so, indicates that the subunit is normal, and if not, indicates that the subunit has a fault.
When the environment is built, the following operations are needed:
the first eCPRI interface and the second eCPRI interface of the remote radio hub 400 are electrically connected to two fiber interfaces of the console 100, respectively.
The remote radio 300 is electrically connected with any CPRI interface on the remote radio concentration device 400, and at the same time, the interface number to which the remote radio 300 is connected is configured in the remote radio concentration device 400.
The signal generating device 200 is electrically connected to a radio frequency interface 310 to be tested in the remote radio device 300.
The GPS device 500 and the power divider 600 are electrically connected, the power divider 600 is electrically connected with the GPS interface of the remote radio hub device 400, the power divider 600 is also electrically connected with the signal generating device 200, and the remote radio hub device 400 synchronizes a clock to the remote radio device 300 through the CPRI interface, namely, the remote radio device 300 and the signal generating device 200 realize synchronization.
The console 100 is electrically connected to the signal generating device 200 through an RJ-45 interface.
Each round of test sequentially selects one radio frequency interface 310 to be tested in the remote radio 300 to be connected with the signal generating device 200 for independent test until all radio frequency interfaces in the remote radio 300 are tested.
The test flow of the embodiment of the present invention is substantially the same as that of the previous embodiment, and will not be described herein.
The embodiment of the present invention realizes the test of the radio frequency interface 310 of the remote radio 300 by arranging the cyclic prefix removing subunit 411, the fast fourier transform subunit 412, the phase post-compensation subunit 413 and the subcarrier demapping subunit 414 in the second signal processing unit 410. By setting the second eCPRI interface in the remote radio hub device 400 and communicating with the console 100, the breakpoint data bit matching verification of each subunit in the second signal processing unit 410 is realized, so that the influence of the fault of the second signal processing unit 410 on the test of the radio frequency interface 310 is eliminated, and the reliability of the test is improved.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (8)
1. An apparatus for testing the performance of a communication receiver, comprising:
the console is used for configuring waveform parameters of the new air interface NR test signal;
a signal generating device in communication with the console for receiving the waveform parameters and generating the NR test signal in accordance with the waveform parameters;
the remote radio equipment comprises a radio frequency interface to be tested, and is communicated with the signal generating equipment and used for receiving the NR test signal sent by the signal generating equipment through the radio frequency interface to be tested, and processing the NR test signal to obtain a processed signal;
the remote radio line concentration device is communicated with the remote radio device and is used for receiving the processed signal sent by the remote radio device and converting the processed signal into a frequency domain signal;
the console is also communicated with the remote radio line concentration device, and is also used for receiving the frequency domain signal sent by the remote radio line concentration device and determining a performance test result according to the frequency domain signal and the waveform parameter;
the remote radio line concentration device comprises:
the input end of the second signal processing unit is electrically connected with the output end of the first signal processing unit of the remote radio, and the output end of the second signal processing unit is electrically connected with the console and is used for converting the processed signal into the frequency domain signal;
the second signal processing unit includes:
the input end of the cyclic prefix removing subunit is electrically connected with the output end of the remote radio equipment;
the input end of the fast Fourier transform subunit is electrically connected with the output end of the cyclic prefix removing subunit;
the input end of the phase post-compensation subunit is electrically connected with the output end of the fast Fourier transform subunit;
and the input end of the subcarrier demapping subunit is electrically connected with the output end of the phase post-compensation subunit, and the output end of the subcarrier demapping subunit is electrically connected with the console.
2. The apparatus of claim 1, wherein the console is further configured to:
determining the error vector amplitude or signal-to-noise ratio of the signal according to the frequency domain signal and the waveform parameter;
and determining a performance test result according to the error vector amplitude or the signal to noise ratio.
3. The apparatus of claim 2, wherein the console is further configured to:
grabbing the frequency domain signal through a TcpDemp to obtain a pcap file;
extracting I/Q data in the pcap file through Wireshark;
and matching the I/Q data with the waveform parameters to obtain the error vector amplitude or the signal-to-noise ratio of the signal.
4. The apparatus of claim 1, wherein the remote radio device comprises:
the input end of the first signal processing unit is electrically connected with the radio frequency interface to be tested, and the output end of the first signal processing unit is electrically connected with the first input end of the remote radio hub device and is used for performing digital-to-analog conversion and up-conversion on the NR test signal to obtain a processed signal.
5. The apparatus of claim 1, wherein the remote radio hub device further comprises: the eCPRI interface, the input end of the cyclic prefix removing subunit, the output end of the fast Fourier transform subunit, the output end of the phase post-compensation subunit and the output end of the subcarrier demapping subunit are all electrically connected with the console through the eCPRI interface;
the console is further configured to perform bit-matching verification on the decycling prefix subunit according to the first signal when receiving the first signals sent by the input end and the output end of the decycling prefix subunit, perform bit-matching verification on the fast fourier transform subunit according to the second signals when receiving the second signals sent by the output end of the decycling prefix subunit and the output end of the fast fourier transform subunit, perform bit-matching verification on the phase post-compensation subunit according to the third signals when receiving the third signals sent by the output end of the phase post-compensation subunit and the output end of the fast fourier transform subunit, and perform bit-matching verification on the subcarrier demapping subunit according to the fourth signals when receiving the output end of the phase post-compensation subunit and the output end of the subcarrier demapping subunit.
6. The apparatus of claim 1, wherein the remote radio hub device further comprises:
the input end of the second signal processing unit is electrically connected with the output end of the first signal processing unit through the first CPRI interface;
and the output end of the second signal processing unit is electrically connected with the control console through the second CPRI interface.
7. The apparatus according to any one of claims 1 to 6, further comprising:
the GPS equipment is used for outputting clock synchronization signals;
and the power divider is respectively communicated with the GPS equipment, the second input end of the remote radio line concentration equipment and the signal generation equipment, and is used for acquiring the clock synchronization signal and transmitting the clock synchronization signal to the remote radio line concentration equipment and the signal generation equipment.
8. The apparatus according to any one of claims 1 to 6, wherein a plurality of the remote radio devices are provided, and the plurality of remote radio devices are electrically connected to the remote radio hub device, respectively.
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| WO2020171800A1 (en) * | 2019-02-19 | 2020-08-27 | Mentor Graphics Corporation | Radio equipment test device |
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