Amplitude and phase characteristic testing method, system, testing and communication equipment, and storage medium

Abstract

Embodiments of the present invention provide an amplitude and phase characteristic testing method, system, test and communication equipment, and storage medium. When acquiring the amplitude and phase characteristics of a coupled network within a communication device, the transmitted test signal is a broadband signal including at least two test frequency points. Therefore, the signal acquisition results after a single test signal transmission can be used by the test device to simultaneously determine the amplitude and phase characteristics of a target channel at at least two test frequency points. By using the broadband signal as the test signal, the independent test processes at at least two test frequency points in the related art are merged, thereby reducing the number of test signal transmission, acquisition, and processing times performed by the communication device, shortening the test time, and thereby enabling the test device to improve test efficiency when testing and extracting the amplitude and phase characteristics of coupled networks within a large number of communication devices.

Description

Technical Field

[0001] The embodiments of the present invention relate to, but are not limited to, the field of communication technology. Specifically, they relate to, but are not limited to, an amplitude and phase characteristic testing method, system, testing and communication equipment, and storage medium. Background Art

[0002] During antenna calibration of a communication device, it is necessary to determine the amplitude and phase differences caused by the communication device's transceiver link and compensate for them during baseband signal processing, thereby achieving ideal power at the communication device's antenna port. However, the combining network in the calibration link itself has amplitude and phase differences. Therefore, to prevent these amplitude and phase differences from being included in the amplitude and phase differences of the transceiver link, thereby affecting the calibration performance, it is necessary to test the amplitude and phase differences of the combining network. Currently, the relevant technology for extracting the amplitude and phase characteristics of the internal coupling network in communication devices uses a vector network single-tone scanning amplitude and phase calibration test scheme. However, this test scheme requires testing at numerous frequency points while ensuring test accuracy, resulting in a time-consuming test process and low test efficiency. Summary of the Invention

[0003] The amplitude and phase characteristic testing method, system, test and communication equipment, and storage medium provided by the embodiments of the present invention mainly solve the technical problem that the related art uses a vector network single-tone scanning amplitude and phase calibration test scheme to extract the amplitude and phase characteristics of the internal coupling network in the communication equipment, but this test scheme is time-consuming and the test efficiency is low.

[0004] To solve the above technical problems, an embodiment of the present invention provides a method for testing amplitude and phase characteristics of an internal coupling network, comprising:

[0005] Obtaining a signal acquisition result for a test signal sent by the communication device under test, the signal acquisition result including a first test signal and a second test signal, wherein the first test signal is a test signal transmitted from a target transmission channel of the communication device and then transmitted through a target channel in an internal coupling network of the communication device, and is acquired and transmitted by the communication device; the second test signal is a test signal transmitted from the target transmission channel and not transmitted through the internal coupling network, and is a broadband signal including at least two test frequency points;

[0006] Determine amplitude and phase difference data between the first test signal and the second test signal at each test frequency point;

[0007] The amplitude and phase characteristics of the target channel at each test frequency point are determined based on the amplitude and phase difference data at each test frequency point.

[0008] An embodiment of the present invention further provides a method for testing amplitude and phase characteristics of an internal coupling network, comprising:

[0009] Controlling a target transmission channel to transmit a test signal, where the target transmission channel is a transmission channel corresponding to a target channel in a coupling network within the communication device, and the test signal is a bandwidth signal including at least two test frequency points;

[0010] Acquire a first test signal, where the first test signal is a test signal transmitted from a target transmission channel and then transmitted through the target channel;

[0011] The collected first test signal is sent to the test equipment. The first test signal is used by the test equipment to determine the amplitude and phase characteristics of the target channel in combination with the second test signal. The second test signal is the test signal transmitted from the target transmission channel without being transmitted through the internal coupling network.

[0012] An embodiment of the present invention further provides a testing device, comprising a first processor, a first memory, and a first communication bus;

[0013] The first communication bus is used to realize the connection and communication between the first processor and the first memory;

[0014] The first processor is used to execute one or more programs stored in the first memory to implement the steps of the first method for testing the amplitude and phase characteristics of the internal coupling network.

[0015] An embodiment of the present invention further provides a communication device, comprising a second processor, a second memory, and a second communication bus;

[0016] The second communication bus is used to realize the connection and communication between the second processor and the second memory;

[0017] The second processor is used to execute one or more programs stored in the second memory to implement the steps of the above-mentioned second method for testing the amplitude and phase characteristics of the internal coupling network.

[0018] An embodiment of the present invention further provides a storage medium, characterized in that the storage medium stores at least one of a first inner coupling network amplitude and phase characteristic test program and a second inner coupling network amplitude and phase characteristic test program, wherein the first inner coupling network amplitude and phase characteristic test program can be executed by one or more processors to implement the steps of the first inner coupling network amplitude and phase characteristic test method described above; and the second inner coupling network amplitude and phase characteristic test program can be executed by one or more processors to implement the steps of the second inner coupling network amplitude and phase characteristic test method described above.

[0019] According to the amplitude and phase characteristic testing method, system, test and communication device, and storage medium provided by embodiments of the present invention, when extracting the amplitude and phase characteristics of the internal coupling network of a communication device, the communication device uses a target transmission channel corresponding to a target channel in the internal coupling network to transmit a bandwidth signal containing at least two test frequency points as a test signal. Subsequently, the communication device can collect the test signal after transmission through the target channel in the internal coupling network as a first test signal and send it to the test device. The test device then determines the amplitude and phase difference data between the first test signal and the second test signal based on the first test signal and a second test signal that has not been transmitted through the internal coupling network. The amplitude and phase characteristics of the target channel are then determined based on this amplitude and phase difference data. Since the test signal transmitted by the solution provided in the embodiment of the present invention is a broadband signal including at least two test frequency points, the signal acquisition results after one test signal transmission can be used by the test equipment to simultaneously determine the amplitude and phase characteristics of the target channel at at least two test frequency points. By using the broadband signal as the test signal, the independent test processes at at least two test frequency points in the related art are merged, thereby reducing the number of times the communication equipment transmits and collects test signals and shortening the test time. This enables the test equipment to improve test efficiency when testing and extracting the amplitude and phase characteristics of the coupled networks in a large number of communication devices.

[0020] Other features and corresponding beneficial effects of the present invention are described in the latter part of the specification, and it should be understood that at least some of the beneficial effects become obvious from the description in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a principle block diagram of a vector network single-tone scanning amplitude and phase calibration test solution in the related art shown in the first embodiment of the present invention;

[0022] Figure 2 A flow chart of the amplitude and phase characteristic test of the internal coupling network provided in the first embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a Type A TM3.1 source signal shown in the first embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a communication device transmitting a test signal in Embodiment 1 of the present invention;

[0025] Figure 5 A schematic diagram showing a principle of collecting a first test signal by a communication device provided in the first embodiment of the present invention;

[0026] Figure 6 A schematic diagram showing a principle of collecting a second test signal by an external device provided in the first embodiment of the present invention;

[0027] Figure 7 Another schematic diagram of the principle of collecting the second test signal by the external device provided in the first embodiment of the present invention;

[0028] Figure 8 A schematic diagram showing a principle of collecting a first test signal and a second test signal by a communication device provided in the first embodiment of the present invention;

[0029] Figure 9 A flow chart showing how the test device provided in the first embodiment of the present invention determines the amplitude and phase difference data at each frequency point;

[0030] Figure 10 A flow chart of the amplitude and phase characteristic test of the internal coupling network provided in the second embodiment of the present invention;

[0031] Figure 11 A schematic diagram showing a principle of collecting a first test signal and a second test signal by a communication device provided in Example 2 of Embodiment 3 of the present invention;

[0032] Figure 12 A schematic diagram of the hardware structure of the test equipment provided in the fourth embodiment of the present invention;

[0033] Figure 13 A schematic diagram of the hardware structure of the communication device provided in the fourth embodiment of the present invention;

[0034] Figure 14 This is a schematic diagram of the internal coupling network amplitude and phase characteristics testing system provided in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the following is a further detailed description of the embodiments of the present invention through specific implementation methods in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Example 1:

[0037] The rapid development of mobile communications is placing increasingly stringent demands on the coverage performance of communications equipment. For example, communications equipment must provide good coverage within a cell while minimizing interference between neighboring cells. To meet these requirements, antenna correction is required to calibrate the amplitude and phase of the RF signal reaching each antenna port, ensuring an ideal power distribution at each port. With the advancement of fifth-generation mobile networks, base station operating frequencies are increasing. Simultaneously, the development of multi-input, multi-output (MIMO) technology is placing increasing demands on the accuracy of antenna correction.

[0038] Antenna calibration involves collecting signals from the transmit channel antenna port through an internal coupling network and transmitting them to the logic chip via a calibration receive channel. This allows the logic chip to obtain the signal's actual transmission parameters, compare them with the signal's expected transmission parameters, and determine the difference. During subsequent signal transmission, during baseband processing of the transmitted signal, this difference can be compensated for, bringing the actual signal parameters closer to the expected transmission parameters. However, the internal coupling network itself has certain amplitude and phase differences. Therefore, the amplitude and phase difference determined by the logic chip includes the amplitude and phase difference of the internal coupling network. To avoid compensating for the amplitude and phase difference of the internal coupling network during baseband signal processing, which could affect antenna calibration accuracy, the amplitude and phase difference of the internal coupling network must be eliminated. Therefore, accurately testing the amplitude and phase difference of the internal coupling network itself is crucial.

[0039] The related technology uses the vector network single-tone scanning amplitude and phase calibration test scheme to extract the amplitude and phase characteristics of the internal coupling network. The implementation principle block diagram of this scheme is as follows: Figure 1 As shown:

[0040] Using the dual-receiver mode of the dual-port vector network 11 (which can also be realized by two common local oscillator spectrometers), the signals of the antenna port 12 and the inspection port 13 are simultaneously introduced into the dual-port vector network 11 for phase and amplitude testing, and the amplitude and phase difference of the two signals is calculated. Figure 1As can be seen from the figure, the signal from antenna port 12 can be coupled into the inner coupling network 10, enter the combiner 14 through the transmission of the corresponding channel, and then enter the dual-port vector network 11 through the inspection port 13. The first signal is actually the signal from antenna port 12 formed after being transmitted through the inner coupling network 10 and combiner 14. Therefore, the amplitude and phase characteristics of this signal include the amplitude and phase characteristics of the corresponding channel in the inner coupling network 10. The other signal (i.e., the second signal) is formed by the signal from antenna port 12 after being transmitted through the combiner fixture board 15. Therefore, the second signal does not pass through the inner coupling network 10, and its amplitude and phase characteristics do not include the differences caused by the inner coupling network 10. Therefore, by calculating the amplitude and phase difference between the first and second signals, the amplitude and phase difference data of this channel in the inner coupling network 10 can be obtained. It should be understood that for multi-antenna communication devices, such as base stations with MIMO antenna arrays, multiple antennas correspond to multiple transmit channels. Accordingly, the inner coupling network 10 also corresponds to multiple channels. In this case, determining the amplitude and phase characteristics of the inner coupling network 10 is actually determining the amplitude and phase characteristics of each channel separately. Therefore, if the communication device has 64 transmit channels, it is necessary to determine the amplitude and phase difference data corresponding to each of the 64 channels according to the above description.

[0041] To further eliminate inherent amplitude and phase differences in the inter-coupling network amplitude and phase characteristic test link, after determining the amplitude and phase difference data for each channel in the inter-coupling network, one channel can be selected from these channels as channel 0 (also known as the reference channel). The difference between the amplitude and phase difference data of the other channels and that of channel 0 is then determined. This difference is the amplitude and phase characteristic of the corresponding channel. For example, if the difference between the amplitude and phase difference data of channel A and that of channel 0 is calculated, this difference is the amplitude and phase characteristic of channel A. This process of determining the channel amplitude and phase characteristics based on the channel amplitude and phase difference data and that of channel 0 is also called normalization relative to channel 0.

[0042] It should be noted that the amplitude and phase characteristics of the channels in the inner coupling network are different at different communication frequencies. Therefore, in order to improve the accuracy of antenna correction, it is necessary to perform the above test process separately at multiple frequencies to obtain the amplitude and phase characteristics of each channel in the inner coupling network at each frequency.

[0043] As can be seen from the foregoing description, the process of testing the amplitude and phase characteristics of the coupling network within a communication device is relatively complex. To meet test accuracy requirements, a test frequency point must be set at least every 5 MHz, meaning the frequency difference between two adjacent test frequencies cannot exceed 5 MHz. Therefore, in the 3400 MHz-3600 MHz frequency band, at least 21 frequency points (including 3400 MHz and 3400 MHz itself) must be set. In this case, to complete the testing of one channel, 21 test signal transmissions are required. Assuming the test time for each frequency point is t, testing the amplitude and phase characteristics of one channel requires 21t. Furthermore, assuming the AAU (Active Antenna Unit) in the communication device has 64 channels, testing the amplitude and phase characteristics of the coupling network within the communication device requires at least 64 × 21t, or 1344t. This demonstrates that this testing solution in the related art is time-consuming and inefficient. To address this issue, this embodiment provides another internal coupling network amplitude and phase characteristic test solution to improve the efficiency of internal coupling network testing for communication equipment. Figure 2 Explain the plan:

[0044] S202: The communication device controls the target transmission channel to transmit a test signal.

[0045] The communication device referred to here is the communication device for which the amplitude and phase characteristics of the internal coupling network are to be extracted. This communication device typically has at least two antennas. In some cases, it refers to a multi-antenna communication device, such as a MIMO base station. The test equipment is used to test the amplitude and phase characteristics of the internal coupling network of the communication device before it is officially put into use (for example, before it leaves the factory). It should be understood that the test equipment can be a single physical device, a distributed device with functions distributed across different physical entities, or a distributed platform.

[0046] When testing a communication device, the test device can instruct the communication device to transmit a test signal. Because the communication device may have multiple transmission channels, the test device can instruct the communication device to transmit the test signal using one of the channels through a transmission instruction. This channel is the target transmission channel for the current test. Alternatively, in some other examples of this embodiment, a tester can manually control the communication device to transmit the test signal, eliminating the need for the test device to send a transmission instruction to the communication device during testing.

[0047] In this embodiment, the test signal is a bandwidth signal that includes at least two test frequency points. For example, in some examples, the frequency setting required for test accuracy is 5 MHz, so the test signal has a bandwidth of at least 10 MHz. It is understood that the test frequency points are not necessarily set to 5 MHz. The smaller the frequency difference between adjacent test frequency points, the higher the test accuracy. Therefore, in some examples of this embodiment, in order to improve test accuracy, the frequency difference between adjacent test frequency points is less than 5 MHz.

[0048] In some examples of this embodiment, the test signal may be a TM3.1 source signal having a DMRS (Demodulation Reference Signal) signal type of Type A in the 3GPP (3rd Generation Partnership Project) 38.141 protocol, in which a power subcarrier and a powerless subcarrier alternately appear, such as Figure 3 As shown. Figure 3 Subcarriers 0, 2, 4, ..., 2n are powered subcarriers, while subcarriers 1, 3, ..., 2n-1 are unpowered subcarriers. The frequency difference between adjacent powered subcarriers is 60 kHz, and the frequency difference between the center frequencies of adjacent powered subcarriers is also 60 kHz.

[0049] In some other examples of this embodiment, the test signal is not limited to being a Type A TM3.1 source signal, but may be any other reference signal except the Type A TM3.1 source signal.

[0050] It is understandable that, given a fixed test accuracy, the larger the test signal bandwidth, the more test frequencies it contains. Therefore, in order to minimize the number of signal transmissions and signal acquisitions and improve test efficiency, it is advisable to consider making the test signal bandwidth as large as possible. However, due to limitations of the communication protocol, the test signal bandwidth cannot be infinite. In 5G communication technology, the maximum bandwidth of the carrier is 100 MHz. Therefore, in some examples of this embodiment, the test signal bandwidth is 100 MHz. Of course, in other examples of this embodiment, the test signal bandwidth can also take other values, such as less than 100 MHz.

[0051] In some examples of this embodiment, the test device may transmit the generated test signal to the communication device, allowing the communication device to directly transmit the test signal. In other examples, the test device may simply instruct the communication device to transmit the test signal through a transmission instruction, while the communication device itself generates the test signal.

[0052] After receiving the transmission instruction from the test equipment or the test instruction from the tester, the communication equipment controls the target transmission channel to transmit the test signal: Figure 4 The test signal is transmitted from the logic chip 41 to the intermediate frequency chip 42 and the RF power amplifier 43 in sequence, and then the test signal is transmitted from the output end of the RF power amplifier 43, that is, the antenna port 430, to the external space through the antenna 44.

[0053] S204: The communication device collects a first test signal.

[0054] The purpose of the test device instructing the communication device to transmit a test signal is to obtain a test signal transmitted through a target channel in the inner coupling network of the communication device and a test signal not transmitted through the inner coupling network. For ease of description, in this embodiment, the test signal transmitted through the target channel in the inner coupling network after being transmitted from the target transmission channel is referred to as a first test signal, and the test signal not transmitted through the inner coupling network is referred to as a second test signal.

[0055] The target transmission channel here refers to the channel in the intercoupling network used to transmit the signal sent by the target transmit channel. For example, a 64-antenna communication device has 64 transmit channels and 64 antenna ports, and the intercoupling network also has 64 channels for transmitting the signals emitted from these 64 antenna ports. Assuming that the current target transmit channel is transmit channel A, the target channel is channel a in the intercoupling network corresponding to target transmit channel A. In fact, the test equipment instructs the communication device to transmit the test signal using transmit channel A as the target transmit channel in order to test the amplitude and phase characteristics of channel a in the intercoupling network.

[0056] In this embodiment, the first test signal is collected by the communication device and then transmitted to the test device. It is understandable that in order to perform antenna calibration during the signal transmission process, the communication device will feed back the signal of the antenna port 53 to the logic chip 52 through the internal coupling network 50 and the correction receiving channel 51, such as Figure 5 As shown. Therefore, the communication device is already provided with a correction receiving channel 51 that is communicatively connected to the inner coupling network 50. In this embodiment, the communication device can collect the first test signal at the output of the correction receiving channel 51. Typically, a communication device has at least two correction receiving channels, for example, a main correction receiving channel and multiple backup correction receiving channels. The communication device can use the output of any one of these channels as the collection point for the first test signal. Of course, the correction receiving channel whose output is used as the collection point for the first test signal must maintain a communication connection with the inner coupling network 50 during the test process. In some examples of this embodiment, the communication device can use the output of the main correction receiving channel as the collection point for the first test signal.

[0057] In some examples of this embodiment, the acquisition of the second test signal can be achieved by an external acquisition device, which collects the second test signal from the target transmission channel antenna port and then provides it to the test device. In one example of this embodiment, the external acquisition device collects the second test signal in a wired manner: Figure 6 In the embodiment, the external acquisition device 60 can be connected to the antenna port 62 of the target transmission channel through a combiner tooling board (such as a 32-way combiner tooling board or a 64-way combiner tooling board, etc.) 61. When the communication device transmits a test signal, the test signal is transmitted to the combiner tooling board 61 through the link between the antenna port 62 and the combiner tooling board 61, and then transmitted to the external acquisition device 60. Then, the collected second test signal is transmitted to the test device 63. In some other examples of this embodiment, the external acquisition device collects the second test signal wirelessly, such as Figure 7 : The external acquisition device 70 has a receiving probe 700. For example, the external acquisition device 70 can be a microwave darkroom or a movable receiving device. It can collect the second test signal of the air interface through the receiving probe 700, that is, the test signal that has been transmitted to the external space through the antenna port and the antenna, and then transmit the collected second test signal to the test device 71.

[0058] In other examples of this embodiment, the communication device itself can acquire the second test signal. For example, in one example of this embodiment, the communication device receives, at the output end of the backup correction receive channel, a test signal transmitted sequentially through the antenna port, the inspection port, and the backup correction receive channel of the target transmission channel as the second test signal. As previously explained, when the communication device is operating normally, the backup correction receive channel should be communicatively connected to the inner coupling network. That is, under normal operating conditions, the output end of the backup correction receive channel should also output a signal transmitted through the inner coupling network. Therefore, during the testing process of this embodiment, to ensure that the backup correction receive channel transmits the second test signal instead of the first test signal, the transmission path between the backup correction receive channel and the inner coupling network needs to be disconnected.

[0059] Considering that if the path between the standby correction receiving channel and the internal coupling network is directly cut off during the test phase, and the path between the standby correction receiving channel and the inspection port is re-established, not only will it take a lot of time for the tester to establish the path between the standby correction receiving channel and the inspection port, but after the test is completed, the tester will also need to restore the path between the standby correction receiving channel and the internal coupling network, which will also take time. This significantly increases the burden on the tester and is also prone to damage to the communication equipment. In order to solve this problem, this embodiment provides a solution to ensure that the communication equipment can operate in two states, and the two states can be flexibly switched: in normal working state, the standby correction receiving channel is connected to the internal coupling network, while in the test state, the path between the standby correction receiving channel and the internal coupling network is disconnected, and the standby correction receiving channel is connected to the inspection port. Please refer to Figure 8 As shown:

[0060] The communication device includes a first combiner 81, a second combiner 82, a first switching switch K1, and a second switching switch K2. Each combiner includes a combining terminal and at least two branching terminals. Each switching switch includes a fixed terminal and at least two selectable terminals. The switching switch can selectively connect its fixed terminal to any of the selectable terminals. For example, assuming that a switching switch includes a fixed terminal, a first selectable terminal (A), and a second selectable terminal (B), the switching switch can be controlled to connect the fixed terminal to the first selectable terminal. In this case, the path between the second selectable terminal and the fixed terminal is cut off. Conversely, the fixed terminal can also be controlled to connect to the second selectable terminal. In this case, the path between the first selectable terminal and the fixed terminal is also cut off.

[0061] exist Figure 8 Among them, the combining end of the first combiner 81 is connected to the internal coupling network 80, the first branching end of the first combiner 81 is connected to the combining end of the second combiner 82, and the first branching end of the second combiner 82 is connected to the main correction receiving channel 83; the fixed end of the first switching switch K1 is connected to the inspection port 84 of the communication equipment, the fixed end of the second switching switch K2 is connected to the backup correction receiving channel 85, the first selection end of the first switching switch K1 is connected to the first selection end of the second switching switch K2, the second selection end of the first switching switch K1 is connected to the second branching end of the first combiner 81, and the second selection end of the second switching switch K2 is connected to the second branching end of the second combiner 82.

[0062] Because the communication device is provided with a first switch K1 and a second switch K2, when the first switch K1 is switched to its second selection end and the second switch K2 is also switched to its second selection end, the inspection port 84 and the backup calibration receiving channel 85 are respectively connected to the internal coupling network 80, and the communication device can be in a normal state. When the first switch K1 is switched to its first selection end and the second switch K2 is also switched to its first selection end, a path is established between the backup calibration receiving channel 85 and the inspection port 84, allowing the communication device to operate in a test state.

[0063] Therefore, in this embodiment, when testing a communication device, during the test preparation phase, the tester can manually control the first switch K1 and the second switch K2 to switch to their respective first selection terminals. In other examples of this embodiment, the first switch K1 and the second switch K2 can automatically switch under the instruction of a control instruction. For example, in some examples of this embodiment, the first switch K1 and the second switch K2 are respectively connected to the processor of the communication device. When the processor of the communication device determines that the communication device needs to be in a test state, it can send control instructions to the first switch K1 and the second switch K2, respectively, instructing the first switch K1 and the second switch K2 to switch to their respective first selection terminals. For example, in some examples of this embodiment, when the communication device receives a transmit instruction sent by the test device, the processor can determine that the current communication device should enter the test state, and therefore, before transmitting a test signal according to the transmit instruction, it first controls the first switch K1 and the second switch K2 to switch.

[0064] When the inspection port is used to transmit the second test signal, the inspection port needs to obtain the test signal of the antenna port of the target transmission channel. In some examples of this embodiment, the inspection port can be connected to the antenna port of the target transmission channel by wire. For example, the inspection port is connected to the corresponding antenna port by a combiner board. The combiner board can be a 32-way combiner board or a 64-way combiner board. The specifications or number of the combiner boards connected to the inspection port are determined according to the number of transmission channels of the communication device. For example, assuming that the communication device to be tested has 64 transmission channels, the combiner board also needs to have 64 channels. In some examples, a 64-way combiner board can be directly used, or it can be implemented by two 32-way combiner boards. In other examples of this embodiment, the inspection port does not need to be connected to the antenna port by wire. For example, the inspection port is connected to a receiving device with a receiving probe that can receive air interface signals. Therefore, when the test signal in the target transmission channel passes through the antenna port and is transmitted to the external space by the antenna, the receiving probe can collect the test signal on the air interface, that is, the second test signal. The receiving device then transmits the collected signal through the inspection port to the backup calibration receiving channel. In this way, the communication device can collect the second test signal from the output end of the backup calibration receiving channel.

[0065] In some examples of this embodiment, the receiving device that helps the communication device receive the second test signal can be a common wireless receiving device. If the communication device is tested outdoors, the receiving device should be mobile. If the communication device is tested indoors, whether the receiving device is mobile or not is not important. In some examples of this embodiment, to ensure the reception quality of the second test signal over the air interface, the receiving device can be a microwave anechoic chamber. A microwave anechoic chamber, also known as an absorbing chamber or radio wave darkroom, absorbs most electromagnetic waves when they strike walls, ceilings, or the ground, with minimal transmission or reflection.

[0066] S206: The communication device sends a first test signal to the test device.

[0067] After the communication device acquires the first test signal, it transmits the first test signal to the test device, allowing the test device to determine the amplitude and phase characteristics of the target channel based on the first test signal and the second test signal. It will be appreciated that if the second test signal is also acquired by the second communication device, the communication device also needs to transmit the second test signal to the test device after acquiring the second test signal.

[0068] In some examples of this embodiment, the communication device may send the first test signal and the second test signal to the test device together. Of course, the communication device may not send the first test signal and the second test signal simultaneously. For example, either the first test signal or the second test signal may be sent first.

[0069] S208: The testing device determines amplitude and phase difference data between the first test signal and the second test signal at each test frequency point.

[0070] The test equipment can obtain the first test signal and the second test signal from the communication device, or obtain the first test signal from the communication device and the second test signal from an external acquisition device. After obtaining the first test signal and the second test signal, the test equipment can first determine the amplitude and phase difference data of the first test signal and the second test signal at each test frequency point. Figure 9 A flow chart for determining the amplitude and phase difference data at each frequency point is shown:

[0071] S902: Perform Fourier transform on the first test signal to obtain a first subcarrier signal corresponding to each test frequency point, and perform Fourier transform on the second test signal to obtain a second subcarrier signal corresponding to each test frequency point.

[0072] In this embodiment, the test device may perform Fourier transform processing on the first test signal and the second test signal synchronously. However, in some other examples of this embodiment, the test device may process the first test signal first or the second test signal first.

[0073] It should be understood that in some examples of this embodiment, the signals acquired by the test device from the communication device or external acquisition device only include the first and second test signals. Invalid signals or invalid portions acquired during the acquisition process are discarded by the communication device. However, in other examples of this embodiment, the communication device or external acquisition device transmits all acquired content to the test device without processing. In this case, the test device needs to extract the valid first and second test signals from the acquired signal acquisition results, align them, and then perform Fourier transform processing. Taking a 100MHz Type A TM3.1 source signal as an example, the test device can first locate the frame header of the synchronous acquisition data, align the first and second test signals, and then extract 4096 points of the symbol corresponding to the DMRS signal in each solt (time slot) of the two signals. In this way, the test device acquires the valid first and second test signals. The test device then performs Fourier transforms on the first and second test signals, obtaining 3276 valid subcarriers for each.

[0074] S904: Determine, according to a demodulation reference signal DRMS ​​mapping rule, a first RE corresponding to each first subcarrier signal and a second RE corresponding to each second subcarrier signal.

[0075] S906: For each test frequency point, perform a conjugate operation on the first RE and the second RE corresponding to the test frequency point, and determine amplitude and phase difference data of the first test signal and the second test signal at the test frequency point based on the operation result.

[0076] The test equipment performs a conjugate operation on the first RE and the second RE determined by the query: first, the absolute phase and amplitude of the first test signal and the second test signal are determined. Then, the test equipment calculates the amplitude ratio and phase difference between the first test signal and the second test signal to obtain the amplitude and phase difference data of a single channel.

[0077] S210: The test device determines the amplitude and phase characteristics of the target channel at each test frequency point based on the amplitude and phase difference data at each test frequency point.

[0078] It should be understood that the amplitude-phase difference data acquired by the test device in S208 is only the amplitude-phase difference data corresponding to a single target channel. For other channels in the inter-coupling network, corresponding amplitude-phase difference data must also be determined according to the process from S202 to S208. The amplitude-phase difference acquired in S208 does not eliminate the amplitude-phase error introduced by the test link. To eliminate this amplitude-phase effect, in this embodiment, the test device further processes the amplitude-phase difference data to obtain the actual amplitude-phase characteristics of the target channel. For example, in some examples of this embodiment, the test device may select a channel from the inter-coupling network as a reference channel, use the amplitude-phase difference data acquired in S208 for the reference channel as the reference amplitude-phase difference data, and then normalize the amplitude-phase difference data of the target channel relative to the reference amplitude-phase difference data to obtain the amplitude-phase characteristics of the target channel. For example, the test device calculates the difference between the amplitude-phase difference data of the target channel and the reference amplitude-phase difference data; this difference is the amplitude-phase characteristic of the target channel relative to the reference channel. It can be seen that the amplitude and phase characteristics finally determined in this embodiment are relative values, while the amplitude and phase characteristics of the reference channel itself are 0.

[0079] According to the aforementioned scheme, the test equipment can determine the amplitude and phase characteristics of each channel in the internal coupling network, record these amplitude and phase characteristics, and then send them to the communication device for storage. For example, after completing the amplitude and phase characteristic test of a channel, the test equipment can write the obtained amplitude and phase characteristics into the internal coupling network amplitude and phase characteristic table. After obtaining the complete internal coupling network amplitude and phase characteristic table, the test equipment sends this table to the communication device. During normal antenna calibration, the communication device can perform amplitude and phase compensation on the transmit channel based on the transmit frequency of the transmit channel and the amplitude and phase characteristic data corresponding to the transmit channel in the stored internal coupling network amplitude and phase characteristic table, thereby ensuring the accuracy of antenna calibration.

[0080] The method for testing the amplitude and phase characteristics of an inter-coupling network provided by an embodiment of the present invention utilizes a broadband signal containing at least two test frequencies as the test signal. This ensures that, after a single test signal transmission and acquisition process, the amplitude and phase characteristics of the target channel of the inter-coupling network at at least two test frequencies can be obtained. This eliminates the need to transmit and acquire a test signal at each test frequency for a single target channel, saving test time and improving test efficiency. Furthermore, compared to related art techniques that, in order to improve test efficiency and reduce testing workload, restrict the selection of a single test frequency to 5 MHz, resulting in low test accuracy, this embodiment significantly reduces the frequency spacing between test frequencies, thereby improving test accuracy. For example, using a Type A TM3.1 source signal as the test signal, the frequency difference between adjacent powered subcarriers is 60 kHz. Each subcarrier center frequency serves as a test frequency. Therefore, the frequency difference between adjacent test frequencies can be reduced to 60 kHz. Compared to the 5 MHz accuracy of related art techniques, using a Type A TM3.1 source signal as the test signal can improve test accuracy by nearly a hundredfold. If other types of test signals are used, for example, a test signal with power per subcarrier, the test accuracy can be further improved to 30 kHz. Therefore, the amplitude and phase characteristics testing method for an internal coupling network provided in this embodiment can not only shorten test time and improve test efficiency, but also simultaneously improve test accuracy.

[0081] Example 2:

[0082] In order to make those skilled in the art more aware of the advantages and details of the method for testing the amplitude and phase characteristics of the internal coupling network, this embodiment will further illustrate the test scheme with examples. Figure 10 The flowchart shown is:

[0083] S1000: The test device controls the communication device to enter a test state.

[0084] In this embodiment, when the test device determines that it wants to test the communication device, it can first control the communication device to enter the test state, for example, sending a test preparation instruction to the communication device, instructing the communication device to switch its first switch and second switch, thereby connecting the path between the inspection port and the backup correction receiving channel and disconnecting the connection between the inspection port and the internal coupling network. Figure 8 For example, the communication device is controlled to switch the first switch to the first selection end and the second switch to the second selection end.

[0085] In other examples of this embodiment, it is not necessary to send a specific test preparation instruction to the communication device. Instead, an agreement can be made with the communication device such that, upon receiving a transmit instruction during a test, the communication device first controls the switch and then transmits the test signal in accordance with the transmit instruction. Alternatively, each time the communication device receives a transmit instruction, it can first determine whether it is currently in a test state. If so, it directly transmits the test signal in accordance with the received transmit instruction. If not, it first switches the switch and then transmits the test signal.

[0086] S1002: The test device determines whether there is a channel in the inter-coupling network that has not been tested.

[0087] If the judgment result is yes, go to S1004, otherwise go to S1020.

[0088] If the judgment result is yes, it means that there are still untested channels in the inter-coupling network. Therefore, it is necessary to continue testing the amplitude and phase characteristics of these channels. If the judgment result is no, it means that all channels in the inter-coupling network have been tested and a complete inter-coupling network amplitude and phase characteristic table has been obtained. Therefore, S1020 can be directly executed.

[0089] S1004: Select one of the channels that have not been tested by the test device as a target channel.

[0090] If the result of the determination in S1002 is no, the test device will select one of the channels in the inter-coupling network that has not been tested as a target channel.

[0091] S1006: The test device sends a transmission instruction to the communication device.

[0092] After determining the target channel, the test device can use the transmission channel corresponding to the target channel as the target transmission channel and send a transmission instruction to the communication device. In the transmission instruction, it not only indicates what kind of test signal the communication device needs to transmit, but also indicates which target transmission channel is used to transmit the test signal.

[0093] S1008: The communication device transmits a test signal using a target transmission channel.

[0094] After receiving the transmission instruction from the test device, the communication device will control the target transmission channel to transmit the test signal according to the transmission instruction. In this embodiment, it is assumed that the test signal transmitted by the communication device is TM3.1 of type A with a bandwidth of 100 MHz.

[0095] S1010: The communication device collects a first test signal and a second test signal at output ends of a main calibration receiving channel and a backup calibration receiving channel respectively.

[0096] In this embodiment, the communication device collects both the first and second test signals. Therefore, after transmitting the test signals, the communication device collects the first and second test signals at the outputs of the primary calibration receive channel and the backup calibration receive channel, respectively. Of course, in other examples of this embodiment, the second test signal can also be collected by an external acquisition device, while the communication device is solely responsible for collecting the first test signal.

[0097] In this embodiment, the second test signal at the inspection port is obtained from the antenna port of the target transmission channel through the combiner tooling board. In some other examples of this embodiment, the second test signal from the inspection port can also be received by the receiving device wirelessly from the air interface.

[0098] S1012: The communication device sends the signal acquisition result to the test device.

[0099] After the communication device collects the first test signal and the second test signal, the signal collection result can be sent to the test device. It should be noted that the collection results of the first test signal and the second test signal can be sent simultaneously or separately.

[0100] S1014: The testing device determines amplitude and phase difference data between the first test signal and the second test signal at each test frequency point.

[0101] After receiving the first test signal and the second test signal, the test equipment can Figure 9 The process shown determines the amplitude and phase difference data of the two test signals at each test frequency point, and the specific process will not be repeated here.

[0102] S1016: The testing device determines the difference between the target channel amplitude-phase difference data and the reference amplitude-phase difference data as the amplitude-phase characteristic of the target channel.

[0103] In this embodiment, the test device can use the first channel selected as the target channel in the inter-coupling network as the reference channel. In this way, the amplitude and phase characteristics of this first channel are zero, and the amplitude and phase characteristics of subsequent channels can be determined based on the reference amplitude and phase difference data of this reference channel. The amplitude and phase characteristics of the current target channel can be determined by calculating the difference between the amplitude and phase difference data of the target channel and the reference channel.

[0104] In some other examples of this embodiment, the amplitude and phase difference data of each channel in the inner coupling network may be determined respectively first, and then a reference channel is randomly determined from these channels, and the amplitude and phase characteristics of each channel are determined.

[0105] S1018: The test device records the amplitude and phase characteristics of the target channel into the internal coupling network amplitude and phase characteristic table.

[0106] After determining the amplitude and phase characteristics of the target channel, the test device records the amplitude and phase characteristics of the target channel into the inter-coupling network amplitude and phase characteristic table of the communication device. Subsequently, the test device will continue to execute S1002.

[0107] S1020: The test device sends the internal coupling network amplitude and phase characteristic table to the communication device.

[0108] If the test equipment determines that all channels in the intercoupling network have been tested, it means that a complete intercoupling network amplitude and phase characteristic table has been obtained, so the test equipment can send the intercoupling network amplitude and phase characteristic table to the communication device.

[0109] S1022: The communication device stores the internal coupling network amplitude and phase characteristic table and exits the test state.

[0110] After receiving the inter-coupling network amplitude and phase characteristic table, the communication device stores it for subsequent use during normal operation. Receiving the inter-coupling network amplitude and phase characteristic table indicates that the test device has completed testing of the communication device. Therefore, the communication device can control itself to exit the test state by switching the first and second switches to their corresponding second selection terminals, thereby connecting the inspection port and the backup calibration receiving channel to the inter-coupling network.

[0111] The internal coupling network amplitude and phase characteristic testing method provided in this embodiment utilizes test equipment to test communications equipment, eliminating the need for dual-port VNA equipment. This significantly reduces instrument procurement costs and lowers the procurement cost of equipment testing. More importantly, the use of broadband signals as test signals improves test efficiency, which helps reduce production costs and enhances product price competitiveness. Furthermore, improvements to the AAU circuit within the communications equipment enable the equipment to automatically switch between test and operating modes, significantly reducing the burden on testers, preventing damage to the communications equipment during the test process, and maintaining the quality of the communications equipment.

[0112] Example 3:

[0113] This embodiment will continue to introduce the aforementioned method for testing the amplitude and phase characteristics of the internal coupling network with two examples:

[0114] Example 1:

[0115] Assume the communications device under test is a 64-channel AAU product, comprising two calibration receive channels: the main calibration receive channel (AC_RX0) and the backup calibration receive channel (AC_RX32). In operation, both AC_RX0 and AC_RX32 are connected to the intercoupling network. However, in test mode, the intercoupling network connection to AC_RX0 can be retained, while a switch can be used to establish a connection from the combiner board to AC_RX32. Furthermore, assuming the communications device operates in the 3400MHz-3600MHz frequency band, testing the amplitude and phase characteristics of the intercoupling network requires testing at test frequencies between 3400MHz and 3600MHz.

[0116] The test principle is roughly as follows: control one transmission channel to transmit a test signal, and after a preset time, perform signal acquisition at the output of the two calibration receiving channels, calculate the amplitude and phase difference data of the two signals, and obtain the amplitude and phase difference of the non-common parts of the two signals. By traversing each transmission channel in turn, the amplitude and phase difference data of each of the 64 transmission channels can be obtained. Finally, these 64 amplitude and phase difference data are normalized relative to the reference amplitude and phase difference data to remove the amplitude and phase differences introduced by the common link part of the 64 tests, and thus obtain the amplitude and phase differences between the 64 channels of the internal coupling network, that is, the amplitude and phase characteristics of each of the 64 channels. Take the test of the nth channel as an example to illustrate:

[0117] 1) Switching the first switch and the second switch;

[0118] 2) Control antenna n to transmit a bandwidth modulated signal with a center frequency of 3450 MHz and a bandwidth of 100 MHz;

[0119] 3) performing signal acquisition at the output ends of the two calibration receiving channels to obtain a first test signal and a second test signal;

[0120] 4) Calculate the amplitude and phase difference data of all test frequency points in the 3400MHz-3500MHz frequency band;

[0121] 5) Continue to control antenna n to transmit a bandwidth modulated signal with a center frequency of 3550 MHz and a bandwidth of 100 MHz;

[0122] 6) performing signal acquisition at the output ends of the two calibration receiving channels to obtain a first test signal and a second test signal;

[0123] 7) Calculate the amplitude and phase difference data of all test frequency points in the 3500MHz-3600MHz frequency band.

[0124] After obtaining the amplitude-phase difference data of each channel, these 64 amplitude-phase difference data are normalized relative to the reference amplitude-phase difference data to obtain the amplitude-phase characteristics of each channel, and the amplitude-phase characteristics are written into a table and recorded. Subsequently, the amplitude-phase characteristic table of the inner coupling network is stored in the communication device.

[0125] Example 2

[0126] Assume that the communication device under test is a 64-channel AAU product, which includes two correction receiving channels, namely the main correction receiving channel (AC_RX0) and the backup correction receiving channel (AC_RX32). In the working state, AC_RX0 and AC_RX32 are both connected to the internal coupling network. However, in the test state, the path from the internal coupling network to AC_RX0 can be retained, and the path from the receiving device and the inspection port to AC_RX32 can be established by switching the switch, as shown in the following example. Figure 11 At the same time, assuming that the operating frequency band of the communication equipment is 3400MHz-3600MHz, the test frequency points between 3400MHz-3600MHz need to be tested when testing the amplitude and phase characteristics of the internal coupling network.

[0127] Take the test of the nth channel as an example to illustrate:

[0128] 1) Switching the first switch and the second switch;

[0129] 2) Move the receiving probe to the middle position between antenna n and antenna n+1;

[0130] In this example, the receiving probe is moved to a position midway between antenna n and antenna n+1. After the receiving probe is moved, signal acquisition can be performed both when antenna n transmits the test signal and when antenna n+1 transmits the test signal. A single probe movement allows testing of both channels, reducing the number of times the receiving probe needs to be moved during the amplitude and phase feature extraction process of the internal coupling network. This means that the receiving probe does not need to be moved when controlling antenna n+1 to transmit the test signal.

[0131] 3) Control antenna n to transmit a bandwidth modulated signal with a center frequency of 3450 MHz and a bandwidth of 100 MHz;

[0132] 4) performing signal acquisition at the output ends of the two calibration receiving channels to obtain a first test signal and a second test signal;

[0133] 5) Calculate the amplitude and phase difference data of all test frequency points in the 3400MHz-3500MHz frequency band;

[0134] 6) Continue to control antenna n to transmit a bandwidth modulated signal with a center frequency of 3550 MHz and a bandwidth of 100 MHz;

[0135] 7) performing signal acquisition at the output ends of the two calibration receiving channels to obtain a first test signal and a second test signal;

[0136] 8) Calculate the amplitude and phase difference data of all test frequency points in the 3500MHz-3600MHz frequency band.

[0137] After obtaining the amplitude-phase difference data of each channel, these 64 amplitude-phase difference data are normalized relative to the reference amplitude-phase difference data to obtain the amplitude-phase characteristics of each channel, and the amplitude-phase characteristics are written into a table and recorded. Subsequently, the amplitude-phase characteristic table of the inner coupling network is stored in the communication device.

[0138] Example 4:

[0139] This embodiment provides a storage medium that can store one or more computer programs that can be read, compiled, and executed by one or more processors. In this embodiment, the storage medium can store at least one of a first inter-coupling network amplitude and phase characteristic test program and a second inter-coupling network amplitude and phase characteristic test program. The first inter-coupling network amplitude and phase characteristic test program can be executed by one or more processors to implement the test device-side process in any of the inter-coupling network amplitude and phase characteristic test solutions described in any of the aforementioned embodiments. The second inter-coupling network amplitude and phase characteristic test program can be executed by one or more processors to implement the communication device-side process in any of the inter-coupling network amplitude and phase characteristic test solutions described in any of the aforementioned embodiments.

[0140] This embodiment also provides a testing device, such as Figure 12 As shown, the test device 12 includes a first processor 121, a memory 122, and a first communication bus 123 for connecting the first processor 121 and the first memory 122. The first memory 122 of the test device 12 can be the storage medium storing the first inter-coupling network amplitude and phase characteristics test program. The first processor 121 can read the first inter-coupling network amplitude and phase characteristics test program, compile it, and execute it to implement the test device-side process of the inter-coupling network amplitude and phase characteristics test program method described in any of the aforementioned embodiments:

[0141] First processor 121 obtains signal acquisition results for a test signal transmitted by a communication device. The signal acquisition results include a first test signal and a second test signal. The first test signal, obtained from the communication device, is a test signal transmitted through a target transmission channel after being transmitted from the target transmission channel. The second test signal is a test signal transmitted from the target transmission channel without being transmitted through an intercoupling network. The test signal is a bandwidth signal including at least two test frequencies. First processor 121 can determine amplitude and phase difference data between the first test signal and the second test signal at each test frequency, and then determine the amplitude and phase characteristics of the target channel at each test frequency based on the amplitude and phase difference data at each test frequency.

[0142] In some examples of this embodiment, before obtaining the signal acquisition result of the test signal sent by the communication device, the first processor 121 sends a transmission instruction to the communication device to be tested to instruct the communication device to use the target transmission channel to transmit the test signal.

[0143] In some examples of this embodiment, when the first processor 121 obtains the signal acquisition result of the test signal sent by the communication device, it can receive the first test signal and the second test signal sent by the communication device.

[0144] In some examples of this embodiment, when the first processor 121 determines the amplitude and phase characteristics of the target channel based on the amplitude and phase difference data, the amplitude and phase difference data can be normalized relative to the reference amplitude and phase difference data to obtain the amplitude and phase characteristics of the target channel, where the reference amplitude and phase difference data is the amplitude and phase difference data determined when the reference channel in the internal coupling network is used as the target channel.

[0145] Optionally, the bandwidth of the test signal is 100 MHz.

[0146] This embodiment also provides a communication device, such as Figure 13 As shown, the test device 13 includes a second processor 131, a memory 132, and a second communication bus 133 for connecting the second processor 131 and the second memory 132. The second memory 132 of the communication device 13 can be the aforementioned storage medium storing the second inter-coupling network amplitude and phase characteristics test program. The second processor 131 can read the second inter-coupling network amplitude and phase characteristics test program, compile it, and execute it to implement the communication device-side process of the inter-coupling network amplitude and phase characteristics test program method described in any of the aforementioned embodiments:

[0147] Second processor 131 controls a target transmission channel to transmit a test signal. The target transmission channel is the transmission channel corresponding to the target channel in the coupled network within the communication device. The test signal is a bandwidth signal containing at least two test frequencies. Subsequently, second processor 131 collects a first test signal, which is transmitted from the target transmission channel and then through the target channel, and sends the collected first test signal to the test device.

[0148] Optionally, the test signal is a Type A TM3.1 source signal.

[0149] In some examples of this embodiment, when the second processor 131 collects the first test signal, it may receive the test signal transmitted sequentially through the inner coupling network and the main correction receiving channel at the output end of the main correction receiving channel as the first test signal.

[0150] In some examples of this embodiment, after controlling the target transmission channel to transmit the test signal according to the transmission instruction, the second processor 131 further collects the second test signal and sends the collected second test signal to the test device.

[0151] Optionally, when the second processor 131 collects the second test signal, it can receive the test signal transmitted in sequence through the antenna port of the target transmission channel, the inspection port of the communication equipment and the spare correction receiving channel at the output end of the spare correction receiving channel as the second test signal. During the transmission of the test signal, the connection between the inspection port and the internal coupling network is in a disconnected state.

[0152] In some examples of this embodiment, the communication device 13 includes a first combiner, a second combiner, a first switching switch, and a second switching switch. The combining end of the first combiner is connected to the inner coupling network, the first branching end of the first combiner is connected to the combining end of the second combiner, and the first branching end of the second combiner is connected to the main correction receiving channel. The fixed end of the first switching switch is connected to the inspection port of the communication device, the fixed end of the second switching switch is connected to the backup correction receiving channel, the first selection end of the first switching switch is connected to the first selection end of the second switching switch, the second selection end of the first switching switch is connected to the second branching end of the first combiner, and the second selection end of the second switching switch is connected to the second branching end of the second combiner. Before the second processor 131 controls the target transmission channel to transmit the test signal according to the transmission instruction, it can also control the first switching switch to switch to its first selection end and control the second switching switch to switch to its first selection end.

[0153] In some examples of this embodiment, the inspection port is wired to the antenna port of the target transmission channel through a combiner tooling plate; or, the inspection port is communicatively connected to a receiving device, and the receiving device has a receiving probe capable of receiving the test signal transmitted from the antenna port of the target transmission channel into the external space.

[0154] This embodiment provides a system for testing the amplitude and phase characteristics of an internal coupling network. Figure 14 The internal coupling network amplitude and phase characteristic test system 14 includes a communication device 13 and a test device 12, and the communication device 13 and the test device 12 are communicatively connected.

[0155] For details of the method for testing the amplitude and phase characteristics of the internal coupling network implemented by the communication device 13 and the testing device 12, please refer to the introduction of embodiments 1 to 3, which will not be repeated here.

[0156] It is understandable that the internal coupling network amplitude and phase characteristics test system 14 can be logically divided into an algorithm processing module, a control module, and a circuit module:

[0157] 1) The control module sends a test signal generation instruction to the algorithm processing module to control the algorithm processing module to generate a test signal;

[0158] 2) After receiving the test signal generation instruction, the algorithm processing module generates a test signal in a dedicated format according to the algorithm;

[0159] 3) After waiting for a while, the control module sends a transmission instruction to the circuit module, and the circuit module sends the test signal generated by the algorithm processing module;

[0160] 4) Under the control of the control module, the circuit module transmits the test signal from the logic chip to the intermediate frequency chip and the RF power amplifier. The test signal is split into two paths at the RF power amplifier output port (antenna port). One path returns to the logic chip through the internal coupling network and the main correction receiving channel; the other path returns to the logic chip through the combiner tooling board / receiving equipment, the inspection port, and the backup correction receiving channel.

[0161] 5) After the control module waits for a period of time, the control logic chip synchronously collects the two received signals, transmits the collected first test signal and second test signal to the algorithm processing module, and sends data processing instructions to the algorithm module;

[0162] 6) After receiving the data processing instruction, the algorithm processing module starts processing the received first test signal and the second test signal to calculate the amplitude and phase characteristics of the inner coupling network;

[0163] 7) After the control module receives the data processing completion signal from the algorithm processing module, it writes the processed amplitude and phase characteristics into a table and transmits it to the communication device memory for storage.

[0164] The amplitude and phase characteristic test system, test and communication equipment, and storage medium provided in this embodiment use a test signal that is a bandwidth signal containing at least two test frequency points. Therefore, the signal acquisition results after a test signal is transmitted once can be used by the test equipment to simultaneously determine the amplitude and phase characteristics of the target channel at at least two test frequency points. By using the bandwidth signal as the test signal, the independent test processes at at least two test frequency points in the related art are merged, thereby reducing the number of test signal transmission and acquisition times performed by the communication equipment and shortening the test time. This enables the test equipment to improve test efficiency when testing and extracting the amplitude and phase characteristics of coupled networks within a large number of communication devices.

[0165] It can be seen that those skilled in the art should understand that all or some of the steps, systems, and functional modules / units in the methods disclosed above can be implemented as software (which can be implemented using computer program code executable by a computing device), firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component can have multiple functions, or a function or step can be performed by several physical components in cooperation. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit.

[0166] In addition, it is well known to those skilled in the art that communication media generally contain computer-readable instructions, data structures, computer 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. Therefore, the present invention is not limited to any specific hardware and software combination.

[0167] The above content is a further detailed description of the embodiments of the present invention in conjunction with specific implementation methods, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A method for testing amplitude and phase characteristics of an internal coupling network, comprising: Obtaining a signal acquisition result for a test signal sent by the communication device under test, the signal acquisition result including a first test signal and a second test signal, wherein the first test signal is a test signal transmitted from a target transmission channel of the communication device and then transmitted through a target channel and a main correction receiving channel in an internal coupling network of the communication device, and is acquired and transmitted by the communication device; and the second test signal is a test signal transmitted from the target transmission channel and then transmitted through a backup correction receiving channel of the communication device but not transmitted through the internal coupling network, and the test signal is a broadband signal including at least two test frequency points. Determining amplitude and phase difference data between the first test signal and the second test signal at each of the test frequency points; Determine the amplitude and phase characteristics of the target channel at each test frequency point according to the amplitude and phase difference data at each test frequency point; Determining the amplitude and phase difference data between the first test signal and the second test signal at each test frequency point includes: Performing a Fourier transform on the first test signal to obtain a first subcarrier signal corresponding to each of the test frequency points, and performing a Fourier transform on the second test signal to obtain a second subcarrier signal corresponding to each of the test frequency points; Determine, according to a demodulation reference signal DRMS ​​mapping rule, a first resource element RE corresponding to each of the first subcarrier signals and a second resource element RE corresponding to each of the second subcarrier signals; For each test frequency point, a conjugate operation is performed on the first RE and the second RE corresponding to the test frequency point, and amplitude and phase difference data of the first test signal and the second test signal at the test frequency point are determined based on the operation result.

2. A method for testing amplitude and phase characteristics of an internal coupling network, comprising: Controlling a target transmission channel to transmit a test signal, wherein the target transmission channel is a transmission channel corresponding to a target channel in a coupling network within the communication device, and the test signal is a bandwidth signal including at least two test frequency points; Acquire a first test signal, where the first test signal is a test signal transmitted from the target transmission channel and then transmitted through the target channel and the main correction receiving channel; Sending the collected first test signal to a test device, wherein the first test signal is used by the test device to determine the amplitude and phase characteristics of the target channel in combination with a second test signal, wherein the second test signal is a test signal transmitted from the target transmit channel and then transmitted through the standby correction receive channel of the communication device but not through the intercoupling network; Among them, the amplitude and phase characteristics of the target channel are determined by the test equipment based on the amplitude and phase difference data of the first test signal and the second test signal at each test frequency point. The method for determining the amplitude and phase difference data includes: performing Fourier transform on the first test signal to obtain the first subcarrier signal corresponding to each test frequency point, and performing Fourier transform on the second test signal to obtain the second subcarrier signal corresponding to each test frequency point; determining the first resource element RE corresponding to each first subcarrier signal and the second RE corresponding to each second subcarrier signal according to the demodulation reference signal DRMS ​​mapping rule query; for each test frequency point, performing a conjugate operation on the first RE and the second RE corresponding to the test frequency point, and determining the amplitude and phase difference data of the first test signal and the second test signal at the test frequency point based on the operation result.

3. The method for testing the amplitude and phase characteristics of an internal coupling network according to claim 2, wherein: The test signal is a TM3.1 source signal of type A.

4. The method for testing the amplitude and phase characteristics of an internal coupling network according to claim 2 or 3, wherein: The collecting of the first test signal comprises: A test signal transmitted sequentially through the inner coupling network and the main correction receiving channel is received at an output end of the main correction receiving channel as the first test signal.

5. The method for testing the amplitude and phase characteristics of an internal coupling network according to claim 2 or 3, wherein: After controlling the target transmission channel to transmit the test signal, the method further includes: collecting the second test signal; The collected second test signal is sent to the test device.

6. The method for testing the amplitude and phase characteristics of an internal coupling network according to claim 5, wherein: The collecting of the second test signal comprises: A test signal transmitted sequentially through the antenna port of the target transmission channel, the inspection port of the communication equipment, and the backup correction receiving channel is received at the output end of the backup correction receiving channel as the second test signal. During the transmission of the test signal, the connection between the inspection port and the internal coupling network is disconnected.

7. The method for testing the amplitude and phase characteristics of an internal coupling network according to claim 6, wherein: The communication device includes a first combiner, a second combiner, a first switch, and a second switch. The combining end of the first combiner is connected to the inner coupling network, the first branching end of the first combiner is connected to the combining end of the second combiner, and the first branching end of the second combiner is connected to the main correction receiving channel; the fixed end of the first switch is connected to the inspection port of the communication device, the fixed end of the second switch is connected to the backup correction receiving channel, the first selection end of the first switch is connected to the first selection end of the second switch, the second selection end of the first switch is connected to the second branching end of the first combiner, and the second selection end of the second switch is connected to the second branching end of the second combiner; Before controlling the target transmission channel to transmit the test signal, the method further includes: The first switch is controlled to switch to its first selection end, and the second switch is controlled to switch to its first selection end.

8. The method for testing the amplitude and phase characteristics of an internal coupling network according to claim 6, wherein: The inspection port is connected to the antenna port of the target transmission channel by wire through a combiner tooling plate; or, the inspection port is communicatively connected to a receiving device, and the receiving device has a receiving probe capable of receiving the test signal emitted by the antenna port of the target transmission channel into the external space.

9. A test device comprising a first processor, a first memory, and a first communication bus; The first communication bus is used to realize connection and communication between the first processor and the first memory; The first processor is configured to execute one or more programs stored in the first memory to implement the steps of the method for testing amplitude and phase characteristics of an internal coupling network as claimed in claim 1.

10. A communication device comprising a second processor, a second memory, and a second communication bus; The second communication bus is used to realize connection and communication between the second processor and the second memory; The second processor is configured to execute one or more programs stored in the second memory to implement the steps of the method for testing amplitude and phase characteristics of an internal coupling network according to any one of claims 2 to 8.

11. A storage medium, characterized in that: The storage medium stores at least one of a first inner coupling network amplitude and phase characteristic test program and a second inner coupling network amplitude and phase characteristic test program. The first inner coupling network amplitude and phase characteristic test program can be executed by one or more processors to implement the steps of the inner coupling network amplitude and phase characteristic test method according to claim 1. The second inner coupling network amplitude and phase characteristic test program can be executed by one or more processors to implement the steps of the inner coupling network amplitude and phase characteristic test method according to any one of claims 2 to 8.

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