Method, device, and medium for testing EVM signals of multi-channel antenna equipment

Abstract

The present disclosure provides a method for testing the signal vector error magnitude (EVM) of a multi-channel antenna device, comprising obtaining a test data source comprising multiple streams through preset orthogonal coding; dividing the test data source into multiple channels of the multi-channel antenna device for transmission; wherein the data transmitted by each channel comprises a portion of data from each stream, and the data transmitted by all channels comprises all data from all streams; receiving a composite signal; wherein the preset orthogonal coding enables the composite signal to satisfy the following conditions: after demodulation, the composite signal only obtains data from a specified stream in the test data source; and demodulating the composite signal based on the data from the specified stream to determine the signal vector error magnitude (EVM) of the multi-channel antenna device. The present disclosure also provides a device and medium for testing the EVM of signals of a multi-channel antenna device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of EVM testing, and in particular to a method, device, and medium for EVM testing of signals of a multi-channel antenna device. Background Art

[0002] Signal vector error magnitude (EVM) is a key parameter for active antenna unit (AAU) signal quality. Fifth-generation (5G) antennas feature Massive MIMO (Massive Multiple Input Multiple Output) and beamforming. Therefore, in practical applications, the signals transmitted by AAUs are typically composite signals composed of multiple channels and multiple streams.

[0003] However, in some related technologies, when testing the EVM of the AAU, what is measured is the EVM of a single-channel signal, which cannot truly reflect the EVM of the synthetic signal, and the testing process is complicated and tedious. Summary of the Invention

[0004] The present disclosure provides a method, device, and medium for EVM testing of multi-channel antenna device signals.

[0005] In a first aspect, an embodiment of the present disclosure provides a method for testing a signal vector error amplitude of a multi-channel antenna device, comprising:

[0006] Obtaining a test data source including multiple streams through preset orthogonal coding;

[0007] Dividing the test data source into multiple channels of the multi-channel antenna device for transmission; the data transmitted by each channel includes a portion of data of each stream, and the data transmitted by all the channels includes all data of all streams;

[0008] Receive a composite signal; the preset orthogonal coding enables the composite signal to satisfy the following conditions: after demodulation of the composite signal, only data of a specified stream in the test data source is obtained;

[0009] The composite signal is demodulated based on the data of the designated stream, and a signal vector error magnitude of the multi-channel antenna device is determined.

[0010] In some embodiments, the multi-channel antenna device includes an active antenna unit.

[0011] In some embodiments, the preset orthogonal coding is orthogonal variable spreading factor coding.

[0012] In some embodiments, the number of streams of the test data source is m, and the number of channels is k*m; m is an integer greater than or equal to 2, and k is a positive integer;

[0013] The k*m channels are equally divided into k groups, and the data transmitted by the m channels in the same group include all data of all streams.

[0014] In some embodiments, dividing the test data source into multiple channels of the multi-channel antenna device for transmission includes:

[0015] performing baseband signal processing on the test data source;

[0016] Dividing the test data source after baseband signal processing into the plurality of channels, and performing digital intermediate frequency processing on the data in each channel;

[0017] The plurality of channels transmit data processed by digital intermediate frequency.

[0018] In some embodiments, the digital IF processing includes digital predistortion processing.

[0019] In some embodiments, receiving the composite signal comprises:

[0020] The multi-channel antenna device couples the signals output by the plurality of channels through a coupling network to obtain a composite signal, and outputs the composite signal from a composite signal port;

[0021] The composite signal output from the composite signal port is received.

[0022] In a second aspect, an embodiment of the present disclosure provides a device for testing a signal vector error amplitude of a multi-channel antenna device, comprising:

[0023] a control module, configured to obtain a test data source including multiple streams through preset orthogonal coding, and divide the test data source into multiple channels of the multi-channel antenna device for transmission; the data transmitted by each channel includes a portion of data from each stream, and the data transmitted by all the channels includes all data from all the streams;

[0024] A receiving module is configured to receive a composite signal; wherein the preset orthogonal coding enables the composite signal to satisfy the following condition: after demodulation of the composite signal, only data of a specified stream in the test data source is obtained;

[0025] The control module is further configured to demodulate the composite signal according to the data of the designated stream and determine a signal vector error magnitude of the multi-channel antenna device.

[0026] In some embodiments, the control module includes an indoor base station unit and a control unit;

[0027] The receiving module includes a spectrum analyzer.

[0028] In a third aspect, an embodiment of the present disclosure provides a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements any method of testing the signal vector error amplitude of a multi-channel antenna device according to an embodiment of the present disclosure.

[0029] In the disclosed embodiment, specifically encoded data is transmitted through multiple channels, and the signals output by the multiple channels are coupled into a composite signal. Due to the specific encoding employed, only one stream of data can be obtained after demodulation of the composite signal. However, the data of the stream actually comes from multiple channels and can reflect the properties of each channel.

[0030] It can be seen that the embodiment of the present disclosure tests the synthetic signal, and the vector error amplitude obtained can truly reflect the situation of the synthetic signal in actual applications, which is intuitive and accurate. At the same time, the embodiment of the present disclosure only needs to test one synthetic signal, and there is no need to test the amplitude and phase difference, phase difference and other information between the channels. The detection process is simple and the error is small. In addition, the synthetic signal measured by the embodiment of the present disclosure is transmitted in a multi-channel antenna device (such as an active antenna unit), so various factors of the multi-channel antenna device (such as the digital domain algorithm module, power amplifier characteristics, etc.) can affect the signal, and the vector error amplitude obtained can reflect the influence of various factors. Finally, the embodiment of the present disclosure tests the signal output by each channel, rather than testing the signal sent through the air interface or channel. Therefore, it is not affected by factors such as the channel and can accurately reflect the quality of the multi-channel antenna device itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the accompanying drawings of the embodiments of the present disclosure:

[0032] Figure 1 A flowchart of a method for EVM testing of multi-channel antenna device signals provided by an embodiment of the present disclosure;

[0033] Figure 2 A flowchart of another method for EVM testing of multi-channel antenna device signals provided by an embodiment of the present disclosure;

[0034] Figure 3 A block diagram of a device for EVM testing of multi-channel antenna device signals provided in an embodiment of the present disclosure;

[0035] Figure 4 A block diagram of another device for performing EVM testing of multi-channel antenna device signals provided by an embodiment of the present disclosure;

[0036] Figure 5 A block diagram of the environment composition of a method for EVM testing of multi-channel antenna device signals provided by an embodiment of the present disclosure;

[0037] Figure 6A schematic diagram of another method for EVM testing of multi-channel antenna device signals provided by an embodiment of the present disclosure;

[0038] Figure 7 A block diagram of the environment composition of another method for EVM testing of multi-channel antenna device signals provided by an embodiment of the present disclosure;

[0039] Figure 8 A block diagram of the composition of a computer-readable medium provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] To enable those skilled in the art to better understand the technical solutions of the present disclosure, the method, device, and medium for EVM testing of multi-channel antenna device signals provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0041] The present disclosure will be described more fully hereinafter with reference to the accompanying drawings, but the illustrated embodiments may be embodied in different forms, and the present disclosure should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that the present disclosure will be thorough and complete and will fully understand the scope of the present disclosure to those skilled in the art.

[0042] The accompanying drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the detailed embodiments, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. The above and other features and advantages will become more apparent to those skilled in the art by describing the detailed embodiments with reference to the accompanying drawings.

[0043] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0044] The terms used in this disclosure are only used to describe specific embodiments and are not intended to limit the disclosure. As used in this disclosure, the term "and / or" includes any and all combinations of one or more of the associated listed items. As used in this disclosure, the singular forms "a," "an," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0045] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meanings as those commonly understood by those skilled in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined in this disclosure.

[0046] Error Vector Magnitude (EVM) indicates the deviation of a signal vector from an error-free reference signal vector. EVM is a key parameter for antenna signal quality. For example, the 3GPP protocol stipulates that during 5G (fifth-generation mobile communication technology) low-frequency band testing, the transmit signal EVM must be within certain limits.

[0047] In some related technologies, the MIMO (Multiple Input Multiple Output) antenna system may include an active antenna unit (AAU) and a radio remote unit (RRU). However, in the integration test of the antenna system, since no signal is actually transmitted, it is difficult to configure multiple streams (such as 4 streams, 8 streams, 16 streams, etc.) on the air interface. Instead, the EVM of a single channel is actually tested, and the consistency of the amplitude and phase between different channels is combined to ensure that the signal quality in actual applications meets the requirements.

[0048] However, many antenna devices feature Massive MIMO and beamforming. Therefore, in practical applications, the transmitter often emits a multi-channel, multi-stream composite signal, which is complex and changeable. Therefore, the EVM of the single-channel signal mentioned above is not equivalent to the EVM of the composite signal, and there is a lack of intuitive correspondence. It is possible that the EVM of the single-channel signal meets the requirements, but the EVM of the composite signal is poor.

[0049] Moreover, the above method also requires testing the amplitude and phase differences between different channels. Since the number of AAU channels is usually large (32 or 64), the process of testing the amplitude and phase differences between multiple channels is cumbersome, non-intuitive, and has large errors.

[0050] In addition, various other factors of the AAU (such as the digital domain algorithm module and power amplifier characteristics) will also affect the EVM of the multi-stream composite signal, and these factors are difficult to characterize through the EVM of the single-channel signal and the amplitude and phase differences between channels.

[0051] In a first aspect, an embodiment of the present disclosure provides a method for EVM testing of signals of a multi-channel antenna device.

[0052] The embodiments of the present disclosure are used to test the signal EVM of an antenna (multi-channel antenna device) having multiple channels (transmitting channels) to determine the quality of the multi-channel antenna device.

[0053] In some embodiments, the multi-channel antenna device includes an active antenna unit (AAU).

[0054] As one embodiment of the present disclosure, the test object of the embodiment of the present disclosure may be an AAU.

[0055] However, it should be understood that the embodiments of the present disclosure may also be applied to other antenna devices having multiple channels.

[0056] Reference Figure 1 The method for testing the EVM of a multi-channel antenna device signal in an embodiment of the present disclosure includes:

[0057] S101. Obtain a test data source including multiple streams through preset orthogonal coding.

[0058] S102: Divide the test data source into multiple channels of a multi-channel antenna device for transmission.

[0059] The data transmitted by each channel includes a portion of data from each stream, and the data transmitted by all channels includes all data from all streams.

[0060] S103: Receive a synthesized signal.

[0061] The preset orthogonal coding can make the synthesized signal meet the following condition: after demodulation of the synthesized signal, only data of a specified stream in the test data source is obtained.

[0062] S104 , demodulate and synthesize the signal according to the data of the designated stream, and determine the signal EVM of the multi-channel antenna device.

[0063] According to the disclosed embodiments, a multi-stream test data source is first prepared. This test data source (e.g., a digital signal of 01) is obtained using a specific encoding scheme (preset orthogonal encoding), where the modulated signals are multiplied by the corresponding encoded signals to achieve mutual orthogonality. The corresponding data is then transmitted across multiple channels (transmitting channels) of a multi-channel antenna device. The data for each stream is transmitted across multiple channels, with each channel also transmitting a portion of the data from multiple streams. The signals (RF signals) output by the multiple channels are then coupled to form a composite signal, which theoretically should include all test data sources.

[0064] Among them, since the preset orthogonal coding can ensure that the composite signal obtained according to its coupling is orthogonal, the data corresponding to multiple streams in the composite signal are eliminated, and only the data of one specified stream can be retained. That is, the composite signal actually only includes the data of one stream, and after demodulation, only the data of one stream can be obtained. Therefore, by demodulating the data of this stream, the EVM of the composite signal can be obtained.

[0065] In the disclosed embodiment, specifically encoded data is transmitted through multiple channels, and the signals output by the multiple channels are coupled into a composite signal. Due to the specific encoding used, only one stream of data can be obtained after demodulation of the composite signal. However, the data of the stream actually comes from multiple channels and can reflect the properties of each channel.

[0066] It can be seen that the embodiment of the present disclosure tests the synthetic signal, and the obtained EVM can truly reflect the situation of the synthetic signal in actual application, which is intuitive and accurate. At the same time, the embodiment of the present disclosure only needs to test one synthetic signal, and there is no need to test information such as amplitude and phase differences between channels. The detection process is simple and the error is small. In addition, the synthetic signal measured by the embodiment of the present disclosure is transmitted in a multi-channel antenna device (such as an AAU). Therefore, various factors of the multi-channel antenna device (such as the digital domain algorithm module, power amplifier characteristics, etc.) can affect the signal, and the obtained EVM can reflect the influence of various factors. Finally, the embodiment of the present disclosure tests the signal output by each channel, rather than testing the signal sent through the air interface or channel. Therefore, it is not affected by factors such as the channel and can accurately reflect the quality of the multi-channel antenna device itself.

[0067] In some embodiments, the preset orthogonal coding is orthogonal variable spreading factor coding.

[0068] As one embodiment of the present disclosure, the preset orthogonal coding used above is Orthogonal Variable Spreading Factor (OVSF) coding.

[0069] It should be understood that other orthogonal encodings besides OVSF encoding are also feasible as long as they meet the above requirement of retaining the data of only one stream in the synthesized signal.

[0070] In some embodiments, the number of streams of the test data source is m, and the number of channels is k*m; m is an integer greater than or equal to 2, and k is a positive integer;

[0071] The k*m channels are equally divided into k groups, and the data transmitted by the m channels in the same group includes all the data of all streams.

[0072] As one embodiment of the present disclosure, the number of channels (k*m) may be a positive integer multiple (k times) of the number of streams (m). For example, if the number of streams is 16, the number of channels may be 16, 32, 64, and so on.

[0073] Because the number of channels is k times the number of streams, all channels can be divided into k groups, each with m channels (if k is 1, the number of channels is also m, and these m channels constitute a group). The m channels in a group collectively transmit data from m individual streams, with each channel transmitting a portion of the data from each stream. Therefore, when there are multiple groups (k is greater than or equal to 2), it is equivalent to the test data source being transmitted "multiple times" by multiple groups. However, it should be understood that the composite signal obtained by coupling the signals of the channels in multiple groups still only includes data from a single specified stream.

[0074] In some embodiments, reference Figure 2, dividing the test data source into multiple channels of the multi-channel antenna device (S102) for transmission includes:

[0075] S1021. Perform baseband signal processing on the test data source.

[0076] S1022: Divide the test data source after baseband signal processing into multiple channels, and perform digital intermediate frequency processing on the data in each channel.

[0077] S1023. Multiple channels transmit the data processed by digital intermediate frequency.

[0078] As one method of an embodiment of the present disclosure, baseband signal processing may be performed on a test data source to obtain a baseband signal, and then digital intermediate frequency processing may be performed before the data is transmitted in a channel.

[0079] Among them, reference Figure 5 The baseband signal processing and digital intermediate frequency processing can be performed by the baseband signal processing module and the digital intermediate frequency processing module in the multi-channel antenna device (such as AAU).

[0080] In some embodiments, the digital IF processing includes digital predistortion processing.

[0081] As one embodiment of the present disclosure, the above digital intermediate frequency processing includes digital predistortion processing (DPD) to correct the nonlinear distortion of the antenna power amplifier.

[0082] Since DPD affects EVM, the data of all channels should be subjected to the same DPD (for example, all channels have the same DPD table), or the data of all channels should not be subjected to DPD to ensure the consistency of each channel.

[0083] It should be understood that the specific digital intermediate frequency processing is not limited to DPD, and may also include digital peak clipping processing (CFR), antenna calibration processing (AC), etc.

[0084] In some embodiments, reference Figure 2 , receiving the synthesized signal (S103) includes:

[0085] S1031. The multi-channel antenna device couples the signals output by multiple channels through a coupling network to obtain a composite signal, and outputs the composite signal from a composite signal port.

[0086] S1032: Receive the synthesized signal output from the synthesized signal port.

[0087] Reference Figure 5As one embodiment of the present disclosure, a coupling network may be provided in a multi-channel antenna unit (AAU) for signal coupling, and the synthesized signal may be output from a synthesized signal port, so that the output synthesized signal may be received and detected accordingly (e.g., using a spectrum analyzer).

[0088] It should be understood that as long as the above steps can be completed during the test process, the location of the hardware module that completes the above steps is optional. Figure 7 The antenna port of the multi-channel antenna device is connected to the "synthesizer", and the synthesizer realizes signal coupling to generate a synthesized signal; for example, other modules outside the multi-channel antenna device (equipment belonging to the multi-channel antenna device signal EVM test) can perform baseband signal processing, digital intermediate frequency processing, etc., and then input the processed signal into the multi-channel antenna device; for example, there can be a module inside the multi-channel antenna device that can receive and detect the synthesized signal.

[0089] In a second aspect, an embodiment of the present disclosure provides a device for EVM testing of multi-channel antenna device signals.

[0090] The embodiments of the present disclosure provide a device for implementing the above test method (device for testing the EVM of signals of a multi-channel antenna device), that is, a device for testing the EVM of signals of a multi-channel antenna device (such as an AAU).

[0091] Reference Figure 3 The device for testing the signal EVM of a multi-channel antenna device according to an embodiment of the present disclosure includes:

[0092] The control module is configured to obtain a test data source including multiple streams through preset orthogonal coding, and divide the test data source into multiple channels of a multi-channel antenna device for transmission; the data transmitted by each channel includes a portion of data from each stream, and the data transmitted by all channels includes all data from all streams.

[0093] The receiving module is used to receive the composite signal; the preset orthogonal coding can make the composite signal meet the following conditions: after the composite signal is demodulated, only data of a specified stream in the test data source is obtained.

[0094] The control module is further configured to demodulate and synthesize a signal according to data of a specified stream, and determine the signal EVM of the multi-channel antenna device.

[0095] As one embodiment of the present disclosure, the control module can control the generation of the above test data source, and allow multiple channels of a multi-channel antenna device (such as an AAU) to transmit the test data source in the above manner and obtain a composite signal, while the receiving module actually receives the composite signal. The control module also determines the signal EVM by analyzing the composite signal.

[0096] In some embodiments, the control module includes an indoor base station unit and a control unit; the receiving module includes a spectrum analyzer.

[0097] As one embodiment of the present disclosure, refer to Figure 4 The control module may include an indoor base station unit (BBU) and a control unit; and the receiving module may include a spectrum analyzer.

[0098] Among them, the spectrum analyzer can be connected to a multi-channel antenna device to receive and detect the synthesized signal; the BBU is used to send configurations (such as sending control signals and data) to multi-channel antenna devices such as AAU to control the operation of AAU; and the control unit can be a computer, etc., which is used to control the BBU and AAU to operate in the required manner, and analyze the synthesized signal received by the spectrum analyzer to obtain the signal EVM.

[0099] As a specific embodiment of the present disclosure, the signal EVM of the AAU (multi-channel antenna unit) is tested using the device and method for testing the signal EVM of the multi-channel antenna unit according to the embodiment of the present disclosure.

[0100] Among them, reference Figure 5 , AAU includes:

[0101] The baseband signal processing module is used to receive the baseband signal transmitted by the BBU and realize high-speed signal processing (baseband signal processing) in wireless communication;

[0102] 64 channels (ch1 to ch64), each channel (transmitting channel, RF link) is used to perform operations such as frequency conversion, amplification, and filtering on the signal, and output the required RF signal to the antenna port and coupling network;

[0103] 64 antenna ports (ant1 to ant64), each of which is connected to the output end of a channel, used to receive the radio frequency signal transmitted by the channel and radiate it into space to achieve wireless communication;

[0104] 64 digital IF processing modules (CH1 to CH64), each connected between a channel and the baseband signal processing module, for performing digital IF processing such as digital pre-distortion (DPD), peak clipping (CFR), and antenna calibration (AC);

[0105] A coupling network connected to the output terminals of the channels and configured to output a composite signal obtained by coupling the signals of the channels at a composite signal port;

[0106] Composite signal port, used to output composite signal.

[0107] Among them, you can also refer to Figure 7,AAU does not include a coupling network, but each antenna port is connected to a synthesizer to play a coupling role.

[0108] The AAU is connected to a device for EVM testing of multi-channel antenna device signals according to an embodiment of the present disclosure, the device comprising:

[0109] The BBU is connected to the baseband signal processing module of the AAU and is used to send configuration, control signals and data to the AAU;

[0110] The computer (control unit) is connected to the BBU, AAU, and spectrum analyzer. It is used to control the BBU and AAU, configure the AAU's service scenarios, monitor the working status of the BBU and AAU, load the test data source into the AAU, and control the spectrum analyzer to demodulate the synthesized signal to obtain the EVM. The computer and the BBU together form the control module.

[0111] The spectrum analyzer (receiving module) has a signal input port connected to the synthetic signal port of the AAU and is used to receive and analyze the synthetic signal.

[0112] Among them, when referring to Figure 7 When the signal EVM test equipment for multi-channel antenna equipment includes a synthesizer, the signal input port of the spectrum analyzer should be connected to the output port of the synthesizer.

[0113] Reference Figure 6 The method for testing the EVM of a multi-channel antenna device signal in an embodiment of the present disclosure includes:

[0114] A1. Prepare a 16-stream test data source.

[0115] OVSF encoding (preset orthogonal encoding) is performed on different channels of the AAU. The characteristics of the test data source obtained in this way are: a single channel contains data from multiple streams and cannot be demodulated individually. However, after the multiple channels are synthesized, due to the orthogonal encoding, the synthesized signal only retains the data of a specified stream. Therefore, it should be demodulated according to the configuration of the data of the stream to obtain EVM.

[0116] For example, the encoding of the streams corresponding to each channel can be shown in the following table. The 64 channels are divided into four groups (1-16, 17-32, 33-48, and 49-64), and the 16 channels in each group are encoded as shown in the following table. It can be seen that, except for stream 1, the sum of the encodings for each stream (actually, the sum of the encodings within the same group) is 0, indicating that the signals are orthogonal. Therefore, stream 1 is the designated stream, and only its data is retained in the composite signal.

[0117]

[0118]

[0119] A2. The computer determines the DPD table of 64 channels.

[0120] This ensures that all channels have the same DPD, preventing some channels from not having DPD and affecting EVM.

[0121] A3. The computer loads the test data source into the AAU through the BBU.

[0122] A4. The computer controls the AAU to perform downlink antenna calibration to calibrate the amplitude and phase differences between the AAU channels.

[0123] This is to ensure that the AAU signal EVM is in the best condition.

[0124] A5. After baseband signal processing, the test data source enters 64 digital intermediate frequency processing modules respectively.

[0125] A6. After the test data source passes through the digital intermediate frequency processing module, it enters 64 channels for transmission.

[0126] A7. Each channel couples the signal into the coupling network. The coupling network couples the received signals into a composite signal and outputs it from the composite signal port.

[0127] A8. The spectrum analyzer receives the synthesized signal.

[0128] A9. Determine the EVM of the synthesized signal obtained by demodulation according to the AAU configuration and the test data source configuration.

[0129] Thirdly, refer to Figure 8 An embodiment of the present disclosure provides a computer-readable medium having a computer program stored thereon. When the computer program is executed by a processor, any method of multi-channel antenna device signal EVM according to the embodiment of the present disclosure is implemented.

[0130] Among them, the processor is a device with data processing capabilities, including but not limited to the central processing unit (CPU); the memory is a device with data storage capabilities, including but not limited to random access memory (RAM, more specifically such as SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and flash memory (FLASH); the I / O interface (read-write interface) is connected between the processor and the memory, which can realize information exchange between the memory and the processor, including but not limited to the data bus (Bus), etc.

[0131] Those skilled in the art will appreciate that all or some of the steps, systems, and functional modules / units in the apparatus disclosed above may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0132] In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation.

[0133] Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit (CPU), a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As is well known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH) or other disk storage; compact disc (CD-ROM), digital versatile disc (DVD) or other optical disc storage; magnetic cassettes, tapes, disk storage or other magnetic storage; any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0134] The present disclosure has disclosed example embodiments, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for purposes of limitation. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly indicated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A method for testing the signal vector error amplitude of a multi-channel antenna device, comprising: Obtaining a test data source including multiple streams through preset orthogonal coding; Dividing the test data source into multiple channels of the multi-channel antenna device for transmission; The data transmitted by each channel includes a portion of data of each stream, and the data transmitted by all the channels includes all data of all streams; Receive a composite signal; the composite signal is obtained by coupling the signals output by the plurality of channels, and the preset orthogonal coding enables the composite signal to satisfy the following condition: after demodulation of the composite signal, only data of a specified stream in the test data source is obtained; The composite signal is demodulated based on the data of the designated stream, and a signal vector error magnitude of the multi-channel antenna device is determined.

2. The method according to claim 1, wherein The multi-channel antenna device includes an active antenna unit.

3. The method according to claim 1, wherein The preset orthogonal coding is orthogonal variable spreading factor coding.

4. The method according to claim 1, wherein The number of streams of the test data source is m, and the number of channels is k*m; m is an integer greater than or equal to 2, and k is a positive integer; The k*m channels are equally divided into k groups, and the data transmitted by the m channels in the same group include all data of all streams.

5. The method according to claim 1, wherein The dividing the test data source into multiple channels of the multi-channel antenna device for transmission comprises: performing baseband signal processing on the test data source; Dividing the test data source after baseband signal processing into the plurality of channels, and performing digital intermediate frequency processing on the data in each channel; The plurality of channels transmit data processed by digital intermediate frequency.

6. The method according to claim 5, wherein: The digital intermediate frequency processing includes digital predistortion processing.

7. The method according to claim 1, wherein The receiving composite signal comprises: The multi-channel antenna device couples the signals output by the plurality of channels through a coupling network to obtain a composite signal, and outputs the composite signal from a composite signal port; The composite signal output from the composite signal port is received.

8. A device for testing the signal vector error amplitude of a multi-channel antenna device, comprising: a control module, configured to obtain a test data source including multiple streams through preset orthogonal coding, and divide the test data source into multiple channels of the multi-channel antenna device for transmission; the data transmitted by each channel includes a portion of data from each stream, and the data transmitted by all the channels includes all data from all the streams; A receiving module is configured to receive a composite signal; wherein the preset orthogonal coding enables the composite signal to satisfy the following condition: after demodulation of the composite signal, only data of a specified stream in the test data source is obtained; The control module is further configured to demodulate the composite signal according to the data of the designated stream and determine a signal vector error magnitude of the multi-channel antenna device.

9. The apparatus according to claim 8, wherein The control module includes an indoor base station unit and a control unit; The receiving module includes a spectrum analyzer.

10. A computer-readable medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method for testing the signal vector error amplitude of a multi-channel antenna device according to any one of claims 1 to 7 is implemented.

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