CN113556190A - Apparatus for testing performance of communication receiver - Google Patents
Apparatus for testing performance of communication receiver Download PDFInfo
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- CN113556190A CN113556190A CN202110813533.1A CN202110813533A CN113556190A CN 113556190 A CN113556190 A CN 113556190A CN 202110813533 A CN202110813533 A CN 202110813533A CN 113556190 A CN113556190 A CN 113556190A
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- 238000012360 testing method Methods 0.000 title claims abstract description 79
- 238000004891 communication Methods 0.000 title claims abstract description 34
- 238000012545 processing Methods 0.000 claims abstract description 50
- 238000011056 performance test Methods 0.000 claims abstract description 18
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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
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- 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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- 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 invention is used for configuring the waveform parameters of a new air interface NR test signal by arranging a console in the device; the signal generating equipment is used for receiving the waveform parameters and generating an NR test signal according to the waveform parameters; the remote radio frequency equipment comprises a radio frequency interface to be tested, and is used for receiving an 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 radio remote concentrator is used for receiving the processed signals sent by the radio remote concentrator and converting the processed signals into frequency domain signals; and the console is also used for receiving the frequency domain signal sent by the radio frequency remote concentrator 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 more common console and signal generating equipment on the market, so that the use of a 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 equipment for wireless communication is an important index for evaluating the overall performance of the communication system, so the radio frequency front end performance test in the development and production stages of the communication equipment is particularly important. With the acceleration of the 5G commercialization process, the requirements of the 5G base station end also show a blowout phenomenon, and in the 5G communication era, small base stations, micro base stations, nano base stations, pico base stations and even smaller femto base stations appear. Therefore, the performance test of the rf front end of the receiver in the 5G base station is in great demand.
At present, when the performance of the radio frequency front end of a receiver in a 5G base station is tested, expensive special communication test equipment is generally needed, and the test cost is high.
Disclosure of Invention
The invention mainly aims to provide a device for testing the performance of a communication receiver, aiming at solving the problem of higher cost when the performance of a radio frequency front end of a receiver in a 5G base station is tested in the prior art.
In order to achieve the above object, a first aspect of the present invention provides an apparatus for testing performance of a communication receiver, comprising:
the console is used for configuring the waveform parameters of the new air interface NR test signal;
the signal generating equipment is communicated with the console and used for receiving the waveform parameters and generating an NR test signal according to the waveform parameters;
the remote radio frequency equipment comprises a radio frequency interface to be tested, 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 frequency interface to be tested to perform digital-to-analog conversion and up-conversion processing so as to obtain a processed signal;
the radio remote concentrator is communicated with the radio remote equipment and used for receiving the processed signals sent by the radio remote equipment and converting the processed signals into frequency domain signals;
the console is also communicated with the remote radio hub equipment, and is also used for receiving frequency domain signals sent by the remote radio hub equipment and determining performance test results according to the frequency domain signals and the waveform parameters.
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 parameter;
and determining a performance test result according to the error vector magnitude 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 TcpLock 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 signal-to-noise ratio of the signal.
In an embodiment of the present invention, a radio remote 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 radio remote concentrator, and is used for performing digital-to-analog conversion and up-conversion processing on the NR test signal to obtain a processed signal.
In an embodiment of the present invention, a radio remote hub device includes:
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 used for converting the time domain signal into a 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 control console.
In this embodiment of the present invention, the radio remote concentrator further includes: the input end of the cyclic prefix removing subunit, the output end of the fast Fourier transform subunit, the output end of the post-phase compensation subunit and the output end of the subcarrier demapping subunit are electrically connected with the console through the eCPRI interface;
the console is also used for carrying out bit matching verification on the cyclic prefix removing subunit according to the first signal under the condition of receiving the first signal sent by the input end and the output end of the cyclic prefix removing subunit, under the condition of receiving a second signal sent by the output end of the cyclic prefix removing subunit and the output end of the fast Fourier transform subunit, carrying out bit matching verification on the fast Fourier transform subunit according to the second signal, under the condition of receiving third signals sent by the output end of the post-phase compensation subunit and the output end of the fast Fourier transform subunit, carrying out bit matching verification on the post-phase compensation subunit according to the third signals, and under the condition of receiving a fourth signal sent by the output end of the compensation subunit and the output end of the subcarrier demapping subunit after the phase, performing bit matching verification on the subcarrier demapping subunit according to the fourth signal.
In this embodiment of the present invention, the radio remote concentrator further includes:
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:
a GPS device for outputting a clock synchronization signal;
and the power divider is respectively communicated with the second input ends of the GPS equipment and the radio remote concentrator and the signal generating equipment, and is used for acquiring a clock synchronization signal and sending the clock synchronization signal to the radio remote concentrator and the signal generating equipment.
In the embodiment of the invention, the number of the radio remote devices is multiple, and the radio remote devices are respectively and electrically connected with the radio remote hub device.
The method and the device are characterized in that a console is arranged in the device and is used for configuring the waveform parameters of a new air interface NR test signal; the signal generating equipment is communicated with the console and used for receiving the waveform parameters and generating an NR test signal according to the waveform parameters; the remote radio frequency equipment comprises a radio frequency interface to be tested, is communicated with the signal generation equipment, and is used for receiving an NR test signal sent by the signal generation equipment through the radio frequency interface to be tested and processing the NR test signal to obtain a processed signal; the radio remote concentrator is communicated with the radio remote equipment and used for receiving the processed signals sent by the radio remote equipment and converting the processed signals into frequency domain signals; the console is also communicated with the remote radio hub equipment, and is also used for receiving frequency domain signals sent by the remote radio hub equipment and determining performance test results according to the frequency domain signals and the waveform parameters. The radio frequency interface of the receiver is tested by combining a more common console and signal generating equipment on the market, so that the use of a 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, which are included to provide a further understanding of the 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 the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a functional block diagram of an apparatus for testing the performance of a communications 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 the communication receiver of FIG. 1;
fig. 3 is a schematic diagram of an alternative configuration of the apparatus for testing the performance of the communication receiver of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
320 | First |
| 200 | |
410 | Second |
| 300 | Radio |
411 | Cyclic |
| 400 | Radio |
412 | Fast Fourier |
| 500 | |
413 | |
| 600 | |
414 | Sub-carrier demapping |
| 310 | Radio frequency interface |
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of 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 in accordance with 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, configured to configure 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 equipment 300 comprises a radio interface to be tested, the remote radio equipment 300 is in communication with the signal generating equipment 200, and is used for receiving the NR test signal sent by the signal generating equipment 200 through the radio interface to be tested and processing the NR test signal to obtain a processed signal; the radio remote hub device 400, which is in communication with the radio remote device 300, and is configured to receive a processed signal sent by the radio remote device 300 and convert the processed signal into a frequency domain signal; the console 100 is further in communication with the radio remote hub device 400, and is further configured to receive a frequency domain signal sent by the radio remote 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., and the embodiment of the present invention is not limited thereto.
It is understood that The New Radio (NR) test signal is a 5G NR signal or a free specific configuration signal formulated according to The 3rd Generation Partnership Project (3 GPP) standard, and a performance test can be rapidly performed on a transmit front end of a receiver through The NR test signal.
In one example, after configuring the waveform parameters of the NR test signal, the console 100 stores the waveform parameters locally, and sends the waveform parameters to the signal generating apparatus 200 through the RJ-45 interface, and the signal generating apparatus 200 generates the NR test signal according to the waveform parameters.
In a specific implementation, the remote radio frequency device 300 may have one or more radio frequency interfaces 310 to be tested, when performance test needs to be performed on one of the radio frequency interfaces 310 to be tested, the radio frequency interface 310 to be tested is electrically connected to the signal generating device 200, the signal generating device 200 sends an NR test signal to the radio frequency interface 310 to be tested, when performance test needs to be performed on the entire remote radio frequency device 300, the signal generating device 200 needs to be electrically connected to each radio frequency interface 310 to be tested in the remote radio frequency device 300 in sequence to perform independent test, the performance of each radio frequency interface 310 is determined, until all the radio frequency interfaces 310 are tested, and then the performance of the entire remote radio frequency device 300 is calculated.
It should be noted that the radio remote hub device 400 is a connection device between the base station and the radio remote device 300, and the radio remote hub device 400 may have one or more interfaces electrically connected to the radio remote device 300, so as to implement one base station to mount one or more radio remote devices 300.
In one example, in the case that there are a plurality of radio remote devices 300, the radio remote devices 300 are electrically connected to the radio remote hub device 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 hub device 400, where the remote radio hub device 400 converts the processed signal into a frequency domain signal and then sends the frequency domain signal to the console 100, and the console 100 determines a performance test result according to the locally stored waveform parameters and the received frequency domain signal.
In one example, the console 100 can determine the 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 magnitude or the signal-to-noise ratio.
Specifically, the console 100 may capture a frequency domain signal through TcpDump 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 signal-to-noise ratio of the signal.
In the implementation process, the console 100 may be provided with a collection unit, an extraction unit, and an analysis unit, the collection unit captures a frequency domain signal at an optical fiber port electrically connected to the radio remote hub device 400 through a network data collection 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 program of a network unpacking tool Wireshark, the analysis unit calls a waveform parameter stored locally by the console 100 when the NR test signal of the signal generation device 200 is configured, and 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 a data analysis program operation.
It should be noted that the pcap file is a common datagram storage format, and data in the file is stored according to a specific format. The I/Q data refers to I (in-phase) and Q (quadrature phase) values of the signal. The error vector magnitude is the vector difference between the I and Q components in the waveform parameters and the I and Q component magnitudes of the actual received frequency domain signal.
In the embodiment of the present invention, the console 100 is provided in the apparatus, and is configured to configure the waveform parameters of the new air interface NR test signal; a signal generating device 200, in communication with the console 100, for receiving the waveform parameters and generating an NR test signal according to the waveform parameters; the remote radio equipment 300 comprises a radio interface to be tested, the remote radio equipment 300 is in communication with the signal generating equipment 200, and is used for receiving the NR test signal sent by the signal generating equipment 200 through the radio interface to be tested and processing the NR test signal to obtain a processed signal; the radio remote hub device 400, which is in communication with the radio remote device 300, and is configured to receive a processed signal sent by the radio remote device 300 and convert the processed signal into a frequency domain signal; the console 100 is further in communication with the radio remote hub device 400, and is further configured to receive a frequency domain signal sent by the radio remote hub device 400, and determine a performance test result according to the frequency domain signal and the waveform parameter. By combining the console 100 and the signal generating device 200 which are more common in the market to test the radio frequency interface 310 of the receiver, the use of a whole set of special test equipment is avoided, and the test cost is reduced.
Fig. 2 is a schematic diagram of an alternative structure of the apparatus for testing the performance of the communication receiver in fig. 1. Referring to fig. 1 and fig. 2, in an embodiment of the present invention, the remote radio device 300 may include: the input end of the first signal processing unit 320 is electrically connected to the radio frequency interface 310 to be tested, and the output end of the first signal processing unit 320 is electrically connected to the first input end of the radio remote hub device 400, and is configured 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 radio remote hub device 400 may include: an input end of the second signal processing unit 410 is electrically connected to an output end of the first signal processing unit 320, and an output end of the second signal processing unit 410 is electrically connected to the console 100, and is configured to convert the processed signal into a frequency domain signal.
In this embodiment of the present invention, the radio remote hub device 400 may further include: a Common Public Radio Interface (CPRI Interface), through which an output terminal of the first signal processing unit 320 is electrically connected to an input terminal of the second signal processing unit 410.
It should be understood that the radio remote hub device 400 may include one or more CPRI interfaces, the radio remote device 300 may be electrically connected to any CPRI interface, and an interface number to which the radio remote device 300 is connected needs to be configured in the radio remote hub device 400.
In one example, the radio remote hub device 400 may further include: the first enhanced CPRI (enhanced CPRI) interface and the second signal processing unit 410 are electrically connected to the optical fiber interface of the console 100 through the first eccri interface, and send the 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 the embodiment of the present invention, the apparatus for testing the performance of a communication receiver may further include a Global Positioning System (GPS) device 500, configured to output a clock synchronization signal; and a power divider 600, which is respectively in communication with the GPS device 500, the second input end of the radio remote 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 radio remote hub device 400 and the signal generating device 200.
Certainly, in order to electrically connect the radio remote hub device 400 and the power splitter 600, a GPS interface needs to be further disposed on the radio remote hub device 400, and the power splitter 600 communicates with the radio remote hub device 400 through the GPS interface.
It should be understood that the requirement for the accuracy of clock synchronization of the 5G base station is very high, the accuracy is usually required to be less than ± 1.5 μ s at the air interface time error between the base stations, and when performing a performance test on the radio frequency front end of the receiving side of the 5G base station, it is required to ensure that the synchronization signals at the receiving and transmitting ends are received and transmitted to avoid the interference of the crossing time slots.
In the embodiment of the present invention, the 5G base station implements clock synchronization by using a satellite synchronization scheme, and in an example, the GPS device 500 may output a clock synchronization signal. In another example, the clock synchronization signal may be output through a Beidou satellite. In another example, a more accurate clock synchronization signal can be output by dual-mode operation of the GPS device 500 and the beidou satellite and automatic switching.
The power divider is also called a power divider, and is a device which divides one path of input signal energy into two paths or multiple paths to output equal or unequal energy. Certain isolation degree should be guaranteed between output ports of one power divider. The power divider is generally divided into two-in-one (one input and two outputs), three-in-one (one input and three outputs), and the like according to the 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, amplitude balance, phase balance, power capacity, bandwidth and the like among the power distribution ports.
The GPS device 500 is used to achieve synchronization of the transmitting and receiving ends. In an example, the GPS device 500 may output a signal of 1PPS 10MHz, and the signal is output to the second input end of the radio remote hub device 400 and the signal generating device 200 through the power splitter 600, so that clock synchronization between the radio remote hub device 400 and the signal generating device 200 is ensured, and the radio remote hub device 400 synchronizes the signal to the radio remote device 300 through the CPRI interface, thereby realizing synchronization between the radio remote device 300 and the signal generating device 200.
In a specific implementation, according to fig. 2, the console 100 and the signal generating device 200, the signal generating device 200 and the radio remote device 300, the radio remote device 300 and the radio remote hub device 400, the radio remote hub device 400 and the console 100, the GPS device 500 and the power divider 600, the power divider 600 and the radio remote hub device 400, the power divider 600 and the signal generating device 200 are connected.
The test flow of the embodiment of the invention is as follows:
the console 100 configures the waveform parameters of the NR test signal, sends the waveform parameters to the signal generating apparatus 200 through the RJ-45 interface, and stores the waveform parameters locally.
The console 100 configures a radio interface 310 to be tested of the remote radio device 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 device 300 through the radio interface 310 to be tested.
The first signal processing unit 320 in the remote radio equipment 300 processes the NR test signal to obtain a processed signal, and sends the processed signal to the remote radio line concentrator 400 through the CPRI interface.
The second signal processing unit 410 in the radio remote 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 eccri interface.
The console 100 analyzes the received signal to obtain an error vector magnitude or a signal-to-noise ratio, and determines the performance of the radio frequency interface 310 to be tested according to the error vector magnitude or the signal-to-noise ratio.
The console 100 continues to configure another radio frequency interface 310 to be tested, and the signal generating device 200 is electrically connected to the another radio frequency interface 310 to be tested, so as to implement the performance test on the another radio frequency interface 310 to be tested, until all the radio frequency interfaces 310 in the radio remote device 300 are tested, and obtain the performance test result of the whole radio remote device 300 according to the performance of all the radio frequency interfaces 310.
In the embodiment of the present invention, the first signal processing unit 320 is disposed in the radio remote device 300, and the second signal processing unit 410, the first eccri interface, and the CPRI interface are disposed in the radio remote hub device 400, so that conversion from an NR test signal to a frequency domain signal is realized, and further, the console 100 tests the radio interface 310 in the radio remote device 300, and by disposing the GPS device 500 and the power divider 600, clock synchronization between the radio remote hub device 400, the radio remote device 300, and the signal generating device 200 is realized. 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, the scheme does not need complex test procedures and special communication test equipment, and the test cost is reduced.
Fig. 3 is a schematic diagram of an alternative configuration of the apparatus for testing the performance of the communication receiver of fig. 1. Referring to fig. 1 and 3, in the embodiment of the present invention, the second signal processing unit 410 includes: a cyclic prefix removing subunit 411, an input end of the cyclic prefix removing subunit 411 being electrically connected to an output end of the first signal processing unit 320; a fast fourier transform subunit 412, wherein an input end of the fast fourier transform subunit 412 is electrically connected with an output end of the cyclic prefix removing subunit 411; the input end of the phase post-compensation subunit 413 is electrically connected with the output end of the fast fourier transform subunit 412; a subcarrier demapping subunit 414, an input end of the subcarrier demapping subunit 414 is electrically connected to an output end of the phase post-compensation subunit 413, and an output end of the subcarrier demapping subunit 414 is electrically connected to the console 100.
It should be understood that, in the embodiment of the present invention, after receiving the time-domain signal, the input of the cyclic prefix removing subunit 411 needs to perform a cyclic prefix removing operation on the received time-domain signal, and send the signal with the cyclic prefix removed to the input of the fast fourier transform subunit 412.
The fft sub-unit 412 performs fft on the received signal and sends the transformed signal to the input of the post-phase compensation sub-unit 413.
The post-phase compensation subunit 413 performs phase lag compensation on the received signal and sends the compensated signal to an input of the subcarrier demapping subunit 414.
The sub-carrier demapping sub-unit 414 performs inverse mapping on the received signal to obtain a frequency domain signal, and transmits the frequency domain signal to the console 100 through the first eccri interface.
In one example, the radio remote hub device 400 further includes: a second eccri interface, where an input end of the cyclic prefix removing subunit 411, an output end of the fast fourier transform subunit 412, an output end of the post-phase compensation subunit 413, and an output end of the subcarrier demapping subunit 414 are all electrically connected to the optical fiber interface of the console 100 through the second eccri interface; the console 100 is further configured to perform bit matching verification on the cyclic prefix removing subunit 411 according to the first signal when receiving the first signal transmitted by the input terminal and the output terminal of the cyclic prefix removing subunit 411, in case of receiving the second signal transmitted at the output of the cyclic prefix removing sub-unit 411 and the output of the fast fourier transform sub-unit 412, the fft sub-unit 412 is verified for bit matching based on the second signal, in case of receiving the third signals transmitted by the output of the post-phase compensation subunit 413 and the output of the fast fourier transform subunit 412, the post-phase compensation subunit 413 is verified for bit matching according to the third signals, in case of receiving the fourth signal transmitted from the output of the phase post-compensation sub-unit 413 and the output of the subcarrier demapping sub-unit 414, the sub-carrier demapping sub-unit 414 performs bit matching verification based on the fourth signal.
It should be understood that the output of the cyclic prefix removing sub-unit 411 is the input of the fft sub-unit 412, the output of the fft sub-unit 412 is the input of the post-phase compensation sub-unit 413, and the output of the post-phase compensation sub-unit 413 is the input of the subcarrier demapping sub-unit 414.
In a specific implementation, the second eccri interface of the radio remote hub device 400 is electrically connected to the optical fiber interface of the console 100, and the input signal and the output signal of each subunit in the second signal processing unit 410 can be respectively obtained through configuration of a register in the radio remote hub device 400, and the console 100 can perform bit matching verification on each subunit according to the input signal and the output signal of each subunit. For example, when 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 relevant parameters preset in the software, if so, it indicates that the subunit is normal, and if not, it indicates that the subunit has a fault.
When the environment is built, the following operations are required to be carried out:
the first eccri interface and the second eccri interface of the radio remote hub device 400 are electrically connected to two optical fiber interfaces of the console 100, respectively.
The radio remote device 300 is electrically connected to any CPRI interface on the radio remote hub device 400, and an interface number to which the radio remote device 300 is connected is configured in the radio remote hub device 400.
The signal generating device 200 is electrically connected to a radio frequency interface 310 to be tested in the radio remote device 300.
The GPS device 500 is electrically connected to the power divider 600, the power divider 600 is electrically connected to a GPS interface of the radio remote hub device 400, the power divider 600 is also electrically connected to the signal generating device 200, and the radio remote hub device 400 synchronizes a clock to the radio remote device 300 through a CPRI interface, that is, the radio remote device 300 and the signal generating device 200 are synchronized.
The console 100 is electrically connected to the signal generating device 200 through an RJ-45 interface.
In each round of test, one radio frequency interface 310 to be tested in the radio remote device 300 is sequentially selected to be connected with the signal generating device 200 for independent test until all the radio frequency interfaces in the radio remote device 300 are tested.
The test flow of the embodiment of the present invention is basically the same as that of the previous embodiment, and is not described herein again.
In the embodiment of the present invention, the cyclic prefix removing subunit 411, the fast fourier transform subunit 412, the post-phase compensation subunit 413, and the subcarrier demapping subunit 414 are arranged in the second signal processing unit 410, so that the test on the radio frequency interface 310 of the radio frequency remote device 300 is implemented. By setting the second eccri interface in the radio remote 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 as to eliminate the influence of the fault of the second signal processing unit 410 on the test of the radio frequency interface 310, and improve the reliability of the test.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An apparatus for testing performance of a communication receiver, comprising:
the console is used for configuring the 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 according to the waveform parameters;
the remote radio frequency equipment comprises a radio frequency interface to be tested, is communicated with the signal generation equipment, and is used for receiving the NR test signal sent by the signal generation equipment through the radio frequency interface to be tested and processing the NR test signal to obtain a processed signal;
the radio remote concentrator is communicated with the radio remote equipment and used for receiving the processed signal sent by the radio remote equipment and converting the processed signal into a frequency domain signal;
the console is also communicated with the remote radio hub equipment, and is further used for receiving the frequency domain signal sent by the remote radio hub equipment and determining a performance test result according to the frequency domain signal and the waveform parameter.
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 magnitude 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 TcpLock 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 signal-to-noise ratio of the signal.
4. The apparatus of claim 1, wherein the radio remote unit 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 radio frequency remote concentrator, so that the NR test signal is subjected to digital-to-analog conversion and up-conversion processing to obtain a processed signal.
5. The apparatus of claim 1, wherein the radio remote hub 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 used for converting the processed signals into the frequency domain signals.
6. The apparatus of claim 5, wherein the second signal processing unit comprises:
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 post-phase compensation subunit, and the output end of the subcarrier demapping subunit is electrically connected with the console.
7. The apparatus of claim 6, wherein the radio remote hub device further comprises: an eCPRI interface, through which the input terminal of the cyclic prefix removing subunit, the output terminal of the fast Fourier transform subunit, the output terminal of the post-phase compensation subunit and the output terminal of the subcarrier demapping subunit are electrically connected to the console;
the console is further configured to perform bit matching verification on the cyclic prefix removing subunit according to the first signal when receiving first signals sent by an input end and an output end of the cyclic prefix removing subunit, perform bit matching verification on the fast fourier transform subunit according to the second signal when receiving second signals sent by the output end of the cyclic prefix removing subunit and the output end of the fast fourier transform subunit, perform bit matching verification on the post-phase compensation subunit according to the third signal when receiving third signals sent by the output end of the post-phase compensation subunit and the output end of the fast fourier transform subunit, and perform bit matching verification on the post-phase compensation subunit according to the third signal when receiving fourth signals sent by the output end of the post-phase compensation subunit and the output end of the subcarrier demapping subunit, and carrying out bit matching verification on the sub-carrier demapping sub-unit according to the fourth signal.
8. The apparatus of claim 5, wherein the radio remote 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 console through the second CPRI interface.
9. The apparatus of any one of claims 1 to 8, further comprising:
a GPS device for outputting a clock synchronization signal;
and the power divider is respectively communicated with the GPS equipment, the second input end of the remote radio hub equipment and the signal generating equipment, and is used for acquiring the clock synchronization signal and sending the clock synchronization signal to the remote radio hub equipment and the signal generating equipment.
10. The apparatus according to any one of claims 1 to 8, wherein there are a plurality of said radio remote devices, and a plurality of said radio remote devices are electrically connected to said radio remote hub device respectively.
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| CN115166382A (en) * | 2022-07-06 | 2022-10-11 | 成都中创锐科信息技术有限公司 | Multi-radiation source coherent signal simulation device and method |
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