CN113572543B - Apparatus for testing performance of communication transmitter - Google Patents
Apparatus for testing performance of communication transmitter Download PDFInfo
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- CN113572543B CN113572543B CN202110815029.5A CN202110815029A CN113572543B CN 113572543 B CN113572543 B CN 113572543B CN 202110815029 A CN202110815029 A CN 202110815029A CN 113572543 B CN113572543 B CN 113572543B
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- 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
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
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- 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]
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- 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 transmitter. The invention is used for generating a new air interface NR test signal by arranging a control console in the device; the remote radio line concentration device is communicated with the control console and used for converting the NR test signal into a digital signal under the condition of receiving the NR test signal; the remote radio equipment comprises a radio interface to be tested, and is communicated with the remote radio line concentration equipment and used for converting digital signals into analog signals under the condition of receiving the digital signals and outputting the analog signals through the radio interface to be tested; the signal analysis equipment is communicated with the radio frequency interface to be tested and is used for receiving the analog signals and determining performance test results according to the analog signals. The radio frequency interface of the transmitter is tested by combining a common control console and signal analysis 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 transmitter.
Background
The transmission performance of a radio frequency device for wireless communication is an important index for evaluating the overall performance of a 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. With the acceleration of the commercialization process of the fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G), the requirement of the 5G base station end also presents blowout phenomenon, and small base stations, micro base stations, nano base stations, pico base stations and even smaller femto base stations will appear in the 5G communication era. Therefore, the requirement for performance testing of the radio frequency front end of the transmitter in the 5G base station is enormous.
Currently, when performance testing is performed on the radio frequency front end of a transmitter 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 transmitter, which aims to solve the problem of higher cost when the performance test is carried out on the radio frequency front end of the transmitter 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 transmitter, the apparatus for testing performance of a communication transmitter comprising:
the console is used for generating a new air interface NR test signal;
the remote radio line concentration device is communicated with the control console and used for converting the NR test signal into a digital signal under the condition of receiving the NR test signal;
the remote radio equipment comprises a radio interface to be tested, and is communicated with the remote radio line concentration equipment and used for converting digital signals into analog signals under the condition of receiving the digital signals and outputting the analog signals through the radio interface to be tested;
the signal analysis equipment is communicated with the radio frequency interface to be tested and is used for receiving the analog signals and determining performance test results according to the analog signals.
In the embodiment of the invention, a preset NR physical layer program is stored in the console or MATLAB software is installed in the console, and the console is also used for generating an NR test signal by calling the preset NR physical layer program or calling a 5G ToolBox file in the MATLAB software.
In the embodiment of the invention, the NR test signal is an NR frequency domain signal;
the remote radio line concentration device comprises:
the input end of the first direct memory access unit is electrically connected with the console;
the input end of the first signal processing unit is electrically connected with the output end of the first direct memory access unit, and the output end of the first signal processing unit is electrically connected with the input end of the remote radio;
the first direct memory access unit is used for periodically sending the NR frequency domain signal to the first signal processing unit under the condition that the NR frequency domain signal is received;
the first signal processing unit is used for converting the NR frequency domain signal into a digital signal and transmitting the digital signal to the remote radio.
In the embodiment of the invention, the remote radio line concentration device further comprises:
the input end of the first direct memory access unit is electrically connected with the console through the RJ-45 interface;
and the output end of the first signal processing unit is electrically connected with the input end of the remote radio frequency identification device through the CPRI interface.
In an embodiment of the present invention, the first signal processing unit includes:
the input end of the subcarrier mapping subunit is electrically connected with the output end of the first direct memory access unit;
the input end of the phase pre-compensation subunit is electrically connected with the output end of the subcarrier mapping subunit;
the input end of the inverse fast Fourier transform subunit is electrically connected with the output end of the phase precompensation subunit;
and the input end of the cyclic prefix adding subunit is electrically connected with the output end of the inverse fast Fourier transform subunit, and the output end of the cyclic prefix adding subunit is electrically connected with the input end of the remote radio.
In the embodiment of the invention, the remote radio line concentration device further comprises: the eCPRI interface, the input end of the sub-carrier mapping subunit, the output end of the phase precompensation subunit, the output end of the inverse fast Fourier transform subunit and the output end of the cyclic prefix adding subunit are all electrically connected with the console through the eCPRI interface;
the control console is further configured to perform bit-matching verification on the subcarrier mapping subunit according to the first signal when the first signal transmitted by the input end and the output end of the subcarrier mapping subunit is received, perform bit-matching verification on the phase precompensation subunit according to the second signal when the second signal transmitted by the output end of the subcarrier mapping subunit and the output end of the phase precompensation subunit is received, perform bit-matching verification on the inverse fast fourier transform subunit according to the third signal when the third signal transmitted by the output end of the phase precompensation subunit and the output end of the inverse fast fourier transform subunit is received, and perform bit-matching verification on the cyclic prefix adding subunit according to the fourth signal when the fourth signal transmitted by the output end of the inverse fast fourier transform subunit and the output end of the cyclic prefix adding subunit is received.
In the embodiment of the invention, the NR test signal is an NR time domain signal;
the remote radio device is also in communication with the console and is further configured to convert the NR time domain signal to an analog signal upon receipt of the NR time domain signal.
In the embodiment of the invention, the remote radio device further comprises:
the input end of the second direct memory access unit is electrically connected with the console;
and the input end of the second signal processing unit is electrically connected with the output end of the second direct memory access unit, and the output end of the second signal processing unit is electrically connected with the radio frequency interface to be tested.
In an embodiment of the present invention, the apparatus for testing performance of a communication transmitter further includes:
the GPS equipment is used for outputting clock synchronization signals;
the power divider is respectively communicated with the GPS equipment, the remote radio line concentration equipment and the signal analysis 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 analysis equipment.
In the embodiment of the invention, the signal analysis device is further used for determining the error vector amplitude or the signal-to-noise ratio of the analog signal, and determining the performance test result according to the error vector amplitude or the signal-to-noise ratio.
According to the embodiment of the invention, the console is arranged in the device and is used for generating a new air interface NR test signal; the remote radio line concentration device is communicated with the control console and used for converting the NR test signal into a digital signal under the condition of receiving the NR test signal; the remote radio equipment comprises a radio interface to be tested, and is communicated with the remote radio line concentration equipment and used for converting digital signals into analog signals under the condition of receiving the digital signals and outputting the analog signals through the radio interface to be tested; the signal analysis equipment is communicated with the radio frequency interface to be tested and is used for receiving the analog signals and determining performance test results according to the analog signals. The radio frequency interface of the transmitter is tested by combining a common control console and signal analysis 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 transmitter 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 transmitter of FIG. 1;
FIG. 3 is a schematic diagram of an alternative configuration of the apparatus for testing the performance of a communication transmitter of FIG. 1;
fig. 4 is a schematic diagram of yet another alternative configuration of the apparatus for testing the performance of a communication transmitter of fig. 1.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Console | 310 | Radio frequency interface |
| 200 | Radio remote line concentration equipment | 320 | Second signal processing unit |
| 300 | Remote radio equipment | 330 | Second direct memory access unit |
| 400 | Signal analysis device | 221 | Subcarrier mapping subunit |
| 500 | GPS equipment | 222 | Phase precompensation subunit |
| 600 | Power divider | 223 | Inverse fast fourier transform subunit |
| 210 | First direct memory access unit | 224 | Cyclic prefix adding subunit |
| 220 | First signal processing unit |
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 transmitter.
Fig. 1 is a functional block diagram of an apparatus for testing the performance of a communication transmitter 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 transmitter may include a console 100 for generating a new air interface NR test signal; a remote radio hub device 200, in communication with the console 100, for converting the NR test signal into a digital signal upon receipt of the NR test signal; the remote radio device 300 comprises a radio interface 310 to be tested, and the remote radio device 300 is in communication with the remote radio line concentration device 200 and is used for converting a digital signal into an analog signal and outputting the analog signal through the radio interface 310 to be tested under the condition of receiving the digital signal; the signal analysis device 400 is in communication with the radio frequency interface 310 to be tested, and is configured to receive the analog signal and determine the performance test result according to the analog signal.
It should be noted that, the console 100 may be a computer console, such as a notebook computer, a desktop computer, a tablet computer, etc., which is not limited in this embodiment of the present invention.
It can be appreciated that The New air interface (NR) test signal is a 5G NR signal formulated according to The third generation partnership project (The 3rd Generation Partnership Project,3GPP) standard, which may be an NR frequency domain signal or an NR time domain signal, and through which a performance test can be quickly performed on a transmitting front end of a transmitter.
In one example, a preset NR physical layer program is stored or MATLAB software is installed in the console 100, and the console 100 generates an NR test signal by calling the preset NR physical layer program or calling a 5G ToolBox file in the MATLAB software.
In a specific implementation, the remote radio line concentration device 200 is a linking device between a base station and the remote radio device 300, and the remote radio line concentration device 200 is provided with one or more interfaces electrically connected with the remote radio device 300, so as to realize that one base station mounts one or more remote radio devices 300.
Of course, the remote radio 300 may also be provided with one or more radio interfaces 310 to be tested, and when performance test needs to be performed on one of the radio interfaces 310 to be tested, the radio interfaces to be tested are electrically connected to the signal analysis device 400, and the signal analysis device 400 receives the analog signal sent by the radio interfaces to be tested and performs signal analysis processing.
In one example, the signal analysis device 400 may be a spectrometer for determining an error vector magnitude or signal-to-noise ratio of the analog signal from which performance test results are determined.
It can be understood that, when testing the performance of a certain rf interface 310 in the remote rf device 300, the signal analysis device 400 obtains the analog signal sent by the rf interface 310, and determines the performance of the rf interface 310 by calculating the error vector magnitude or the signal-to-noise ratio; when testing the performance of the transmitting front end of the whole remote radio 300, the signal analysis device 400 needs to be electrically connected with each radio interface 310 in the remote radio 300 in turn to perform an independent test, so as to determine the performance of each radio interface 310, until all the radio interfaces 310 are tested, and then calculate the performance of the whole remote radio 300.
The control console 100 is arranged in the device and is used for generating a new air interface NR test signal; a remote radio hub device 200, in communication with the console 100, for converting the NR test signal into a digital signal upon receipt of the NR test signal; the remote radio device 300 comprises a radio interface 310 to be tested, and the remote radio device 300 is in communication with the remote radio line concentration device 200 and is used for converting a digital signal into an analog signal and outputting the analog signal through the radio interface 310 to be tested under the condition of receiving the digital signal; the signal analysis device 400 is in communication with the radio frequency interface 310 to be tested, and is configured to receive the analog signal and determine the performance test result according to the analog signal. By combining the console 100 and the signal analysis device 400, which are more common in the market, to test the radio frequency interface 310 of the transmitter, 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 configuration of the apparatus for testing the performance of a communication transmitter of fig. 1. Referring to fig. 1 and 2, in an embodiment of the present invention, the NR test signal is an NR frequency domain signal; the remote radio hub device 200 may include: a first direct memory access unit 210, an input of the first direct memory access unit 210 being electrically connected to the console 100; the input end of the first signal processing unit 220 is electrically connected with the output end of the first direct memory access unit 210, and the output end of the first signal processing unit 220 is electrically connected with the input end of the remote radio 300; the first direct memory access unit 210 is configured to periodically transmit the NR frequency domain signal to the first signal processing unit 220 in case of receiving the NR frequency domain signal; the first signal processing unit 220 is configured to convert the NR frequency domain signal into a digital signal and transmit the digital signal to the remote radio 300.
In an embodiment of the present invention, the remote radio hub device 200 may further include: an RJ-45 interface, the input end of the first direct memory access unit 210 is electrically connected with the console 100 through the RJ-45 interface; and a common public radio interface (Common Public Radio Interface, CPRI interface), the output end of the first signal processing unit 220 is electrically connected to the input end of the remote radio 300 through the CPRI interface.
It should be understood that the remote radio hub 200 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 200 may also need to be configured with an interface number to which the remote radio 300 is connected.
In an embodiment of the present invention, the apparatus for testing performance of a communication transmitter 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 remote radio hub device 200, and the signal analysis device 400, and is configured to acquire a clock synchronization signal and transmit the clock synchronization signal to the remote radio hub device 200 and the signal analysis device 400.
Of course, in order to realize that the remote radio hub 200 is electrically connected to the power divider 600, a GPS interface needs to be further provided on the remote radio hub 200, and the power divider 600 communicates with the remote radio hub 200 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.
In one example, the GPS device 500 may output a 1pps 10mhz signal, which is output to the remote hub device 200 and the signal analysis device 400 through the power divider 600, so as to ensure clock synchronization of the remote hub device 200 and the signal analysis device 400.
In a specific implementation, the console 100 and the remote radio line concentration device 200, the remote radio line concentration device 200 and the remote radio device 300, the remote radio device 300 and the signal analysis device 400, the GPS device 500 and the power divider 600 are connected according to fig. 2, and the power divider 600 and the remote radio line concentration device 200, the power divider 600 and the signal analysis device 400 are connected.
After generating the NR frequency domain signal, the console 100 may send the NR frequency domain signal to an input of the first direct memory access unit 210 through an RJ-45 interface.
After the first direct memory access unit 210 in the remote radio hub device 200 receives the NR frequency domain signal, the NR frequency domain signal is stored and periodically sent to the input end of the first signal processing unit 220, where the first signal processing unit 220 converts the NR frequency domain signal into a digital signal, and sends the digital signal to the remote radio device 300 through the CPRI interface.
The console 100 configures the radio frequency interface 310 to be tested, and the digital signal is processed by the remote radio 300 to obtain an analog signal, and the analog signal is sent to the signal analysis device 400 through the radio frequency interface 310 to be tested.
The signal analysis device 400 processes the analog signal to obtain an error vector magnitude or signal-to-noise ratio, and determines the performance of the radio frequency interface 310 under test according to the error vector magnitude or signal-to-noise ratio.
The console 100 continues to configure another radio frequency interface 310 to be tested, and the signal analysis device 400 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 obtain the performance test result of the whole remote radio device 300 according to the performance of all radio frequency interfaces 310.
In the embodiment of the invention, by arranging the first direct memory access unit 210, the first signal processing unit 220, the RJ-45 interface and the CPRI interface in the remote radio hub device 200, the test of the radio frequency interface 310 in the remote radio device 300 is realized under the condition that the NR test signal is an NR frequency domain signal, and the clock synchronization of the remote radio hub device 200 and the signal analysis device 400 is realized by arranging 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 5G base station side transmitter 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 transmitter of fig. 1. Referring to fig. 1 and 3, in an embodiment of the present invention, the first signal processing unit 220 may include: a subcarrier mapping subunit 221, an input terminal of the subcarrier mapping subunit 221 being electrically connected to an output terminal of the first direct memory access unit 210; a phase pre-compensation subunit 222, the input terminal of the phase pre-compensation subunit 222 being electrically connected to the output terminal of the subcarrier mapping subunit 221; an inverse fast fourier transform subunit 223, the input of the inverse fast fourier transform subunit 223 being electrically connected to the output of the phase precompensation subunit 222; the cyclic prefix adding subunit 224, the input end of the cyclic prefix adding subunit 224 is electrically connected to the output end of the inverse fast fourier transform subunit 223, and the output end of the cyclic prefix adding subunit 224 is electrically connected to the input end of the remote radio 300.
It should be understood that after the input end of the subcarrier mapping subunit 221 receives the NR frequency domain signal, the signals in different frequency domains are mapped to corresponding subcarriers, the signal on each subcarrier is multiplied by a preset phase compensation parameter in the phase precompensation subunit 222 and then sent to the inverse fast fourier transform subunit 223, the inverse fast fourier transform subunit 223 performs inverse fast fourier transform on the received signal and then sends to the cyclic prefix adding subunit 224, and the cyclic prefix adding subunit 224 prefixes the received signal, so as to generate a complete orthogonal frequency division multiplexing (Orthogonal Frequency-Division Multiplexing, OFDM) symbol, and the OFDM symbol is a digital signal, and the digital signal is transmitted to the radio frequency remote device 300 through the CPRI interface.
In one example, the remote radio hub device 200 further comprises: an enhanced CPRI (eCPRI) interface, an input end of the subcarrier mapping subunit 221, an output end of the phase precompensation subunit 222, an output end of the inverse fast fourier transform subunit 223, and an output end of the cyclic prefix adding subunit 224 are all electrically connected with the console 100 through the eCPRI interface; the console 100 is further configured to perform bit-matching verification on the subcarrier mapping subunit 221 according to the first signal when the first signal transmitted by the input end and the output end of the subcarrier mapping subunit 221 is received, perform bit-matching verification on the phase pre-compensation subunit 222 according to the second signal when the second signal transmitted by the output end of the subcarrier mapping subunit 221 and the output end of the phase pre-compensation subunit 222 is received, perform bit-matching verification on the inverse fast fourier transform subunit 223 according to the third signal when the third signal transmitted by the output end of the phase pre-compensation subunit 222 and the output end of the inverse fast fourier transform subunit 223 is received, and perform bit-matching verification on the cyclic prefix adding subunit 224 according to the fourth signal when the fourth signal transmitted by the output end of the inverse fast fourier transform subunit 223 and the output end of the cyclic prefix adding subunit 224 is received.
It should be understood that the output of the subcarrier mapping subunit 221 is the input of the phase precompensation subunit 222, the output of the phase precompensation subunit 222 is the input of the inverse fast fourier transform subunit 223, and the output of the inverse fast fourier transform subunit 223 is the input of the cyclic prefix adding subunit 224.
In a specific implementation, the eCPRI interface of the remote radio hub device 200 is electrically connected to the optical fiber interface of the console 100, and by configuring registers in the remote radio hub device 200, the input signals and the output signals of each subunit in the first signal processing unit 220 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.
The embodiment of the present invention realizes the test of the radio frequency interface 310 of the remote radio 300 in the case that the NR test signal is an NR frequency domain signal by arranging the subcarrier mapping subunit, the phase precompensation subunit 222, the inverse fast fourier transform subunit 223 and the cyclic prefix adding subunit 224 in the first signal processing unit 220. By setting the eCPRI interface in the remote radio hub device 200 and communicating with the console 100, the breakpoint data bit matching verification of each subunit in the first signal processing unit 220 is realized, so that the influence of the fault of the first signal processing unit 220 on the test of the radio frequency interface 310 is eliminated, and the reliability of the test is improved.
Fig. 4 is a schematic diagram of yet another alternative configuration of the apparatus for testing the performance of a communication transmitter of fig. 1. Referring to fig. 1 and 4, in an embodiment of the present invention, the NR test signal is an NR time domain signal; the remote radio device 300 is also in communication with the console 100 and is further configured to convert the NR time domain signal to an analog signal upon receipt of the NR time domain signal.
In the embodiment of the present invention, the apparatus for testing performance of a communication transmitter may further include: a GPS device 500 for outputting a clock synchronization signal; the power divider 600 is respectively in communication with the GPS device 500, the remote radio hub device 200 and the signal analysis device 400, and is configured to obtain a clock synchronization signal and send the clock synchronization signal to the remote radio hub device 200 and the signal analysis device 400.
Of course, in order to realize that the remote radio hub 200 is electrically connected to the power divider 600, a GPS interface needs to be further provided on the remote radio hub 200, and the power divider 600 communicates with the remote radio hub 200 through the GPS interface.
It should be appreciated that the GPS device 500 is used to achieve synchronization of both the transceiver ends. In one example, the GPS device 500 may output a 1pps 10mhz signal, where the signal is output to the remote radio hub 200 and the signal analysis device 400 through the power divider 600, so as to ensure clock synchronization of the remote radio hub 200 and the signal analysis device 400, and the remote radio hub 200 synchronizes the signal to the remote radio 300 through the CPRI interface, so as to achieve synchronization of the remote radio 300 and the signal analysis device 400.
It should be appreciated that in the case where the NR test signal is an NR time domain signal, although the NR time domain signal is not processed by the remote hub device 200, it is still necessary to electrically connect the remote hub device 200 with the remote hub device 300, in order to achieve clock synchronization of the remote hub device 200 with the remote hub device 300 after clock synchronization of the remote hub device 200 with the signal analysis device 400.
In one example, the remote radio device 300 may further include: a second direct memory access unit 330, an input of the second direct memory access unit 330 being electrically connected to the console 100; the input end of the second signal processing unit 320 is electrically connected to the output end of the second direct memory access unit 330, and the output end of the second signal processing unit 320 is electrically connected to the radio frequency interface 310 to be tested.
It should be appreciated that to enable electrical connection of the remote radio 300 to the console 100, the remote radio 300 may also include an RJ-45 interface through which the remote radio 300 communicates with the console 100.
It should be noted that, after receiving the NR time domain signal, the second direct memory access unit 330 may store the NR time domain signal and periodically send the NR time domain signal to the second signal processing unit 320. In one example, the second signal processing unit 320 performs digital-to-analog conversion, phase compensation, and the like on the discrete NR time domain signal to obtain an analog signal, and transmits the analog signal to the signal analysis apparatus 400 through the radio frequency interface to be measured 310.
In a specific implementation, the console 100 and the remote radio device 300, the remote radio hub device 200 and the remote radio device 300, the remote radio device 300 and the signal analysis device 400, the GPS device 500 and the power divider 600, the power divider 600 and the remote radio hub device 200, the power divider 600 and the signal analysis device 400 are connected according to fig. 4.
After generating the NR time domain signal, the console 100 may send the NR time domain signal to an input of the second direct memory access unit 330 through an RJ-45 interface.
After receiving the NR time domain signal, the second direct memory access unit 330 in the remote radio 300 stores the NR time domain signal and periodically sends the NR time domain signal to the input of the second signal processing unit 320.
The console 100 configures the radio frequency interface 310 to be tested, the second signal processing unit 320 performs digital-to-analog conversion, phase compensation and other processes on the NR time domain signal, so as to obtain an analog signal, and the analog signal is sent to the signal analysis device 400 through the radio frequency interface 310 to be tested.
The signal analysis device 400 processes the analog signal to obtain an error vector magnitude or signal-to-noise ratio, and determines the performance of the radio frequency interface 310 under test according to the error vector magnitude or signal-to-noise ratio.
The console 100 continues to configure another radio frequency interface 310 to be tested, and the signal analysis device 400 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 obtain the performance test result of the whole remote radio device 300 according to the performance of all radio frequency interfaces 310.
According to the embodiment of the invention, the console 100 is also communicated with the remote radio 300, so that the performance test of the radio frequency front end of the transmitter is performed through different test paths under the condition that the NR test signal is an NR time domain signal and an NR frequency domain signal, and the test flexibility 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 performance of a communication transmitter, comprising:
the control console is used for generating a new air interface NR test signal, wherein the NR test signal is an NR frequency domain signal;
the remote radio line concentration device is communicated with the control console, and the remote radio line concentration device comprises:
the input end of the first direct memory access unit is electrically connected with the console;
the input end of the first signal processing unit is electrically connected with the output end of the first direct memory access unit, and the output end of the first signal processing unit is electrically connected with the input end of the remote radio;
the first direct memory access unit is configured to periodically transmit the NR frequency domain signal to the first signal processing unit when the NR frequency domain signal is received;
the first signal processing unit is used for converting the NR frequency domain signal into a digital signal and transmitting the digital signal to the remote radio;
the remote radio equipment comprises a radio interface to be tested, and is communicated with the remote radio line concentration equipment and used for converting the digital signal into an analog signal and outputting the analog signal through the radio interface to be tested under the condition that the digital signal is received;
and the signal analysis equipment is communicated with the radio frequency interface to be tested, and is used for receiving the analog signal and determining a performance test result according to the analog signal.
2. The apparatus of claim 1, wherein a preset NR physical layer program or MATLAB software is stored in the console, and wherein the console is further configured to generate the NR test signal by calling the preset NR physical layer program or calling a 5G ToolBox file in the MATLAB software.
3. The apparatus of claim 1, wherein the remote radio hub device further comprises:
the input end of the first direct memory access unit is electrically connected with the console through the RJ-45 interface;
and the output end of the first signal processing unit is electrically connected with the input end of the remote radio frequency equipment through the CPRI interface.
4. The apparatus of claim 1, wherein the first signal processing unit comprises:
the input end of the subcarrier mapping subunit is electrically connected with the output end of the first direct memory access unit;
the input end of the phase pre-compensation subunit is electrically connected with the output end of the subcarrier mapping subunit;
the input end of the inverse fast Fourier transform subunit is electrically connected with the output end of the phase precompensation subunit;
and the input end of the cyclic prefix adding subunit is electrically connected with the output end of the inverse fast Fourier transform subunit, and the output end of the cyclic prefix adding subunit is electrically connected with the input end of the remote radio.
5. The apparatus of claim 4, wherein the remote radio hub device further comprises: the eCPRI interface is electrically connected with the console through the eCPRI interface, wherein the input end of the subcarrier mapping subunit, the output end of the phase precompensation subunit, the output end of the inverse fast Fourier transform subunit and the output end of the cyclic prefix adding subunit are all connected with the control console through the eCPRI interface;
the console is further configured to perform bit-matching verification on the subcarrier mapping subunit according to the first signal when the first signals transmitted by the input end and the output end of the subcarrier mapping subunit are received, perform bit-matching verification on the phase precompensation subunit according to the second signal when the second signals transmitted by the output end of the subcarrier mapping subunit and the output end of the phase precompensation subunit are received, perform bit-matching verification on the inverse fast fourier transform subunit according to the third signals when the third signals transmitted by the output end of the phase precompensation subunit and the output end of the inverse fast fourier transform subunit are received, and perform bit-matching verification on the cyclic prefix adding subunit according to the fourth signals when the fourth signals transmitted by the output end of the inverse fast fourier transform subunit and the output end of the cyclic prefix adding subunit are received.
6. The apparatus of claim 1, wherein the remote radio device further comprises:
the input end of the second direct memory access unit is electrically connected with the console;
the input end of the second signal processing unit is electrically connected with the output end of the second direct memory access unit, and the output end of the second signal processing unit is electrically connected with the radio frequency interface to be tested.
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 remote radio line concentration equipment and the signal analysis 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 analysis equipment.
8. The device according to any one of claims 1 to 6, wherein,
the signal analysis device is also used for determining the error vector amplitude or the signal-to-noise ratio of the analog signal, and determining a performance test result according to the error vector amplitude or the signal-to-noise ratio.
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