Digital TR component automatic receiving test method and system

Abstract

The invention discloses an automatic receiving test method and system for a digital TR component, and the method comprises the steps: switching a test device connected with the digital TR component at a currently executed test item by a switch matrix, switching to a receiving reference channel, and switching a currently tested radio frequency port of the digital TR component; the digital TR assembly and the digital signal processing device receive radio frequency signals output from the test device through the switch matrix, digital processing is carried out on the radio frequency signals to obtain first digital signals and second digital signals, and the automatic test software calls an FFT algorithm to calculate the first digital signals and the second digital signals. Through switching of the switch matrix and digital processing of the digital signal processing equipment, the rapid switching and automatic testing process of the digital TR assembly in various receiving test scenes is realized.

Description

Technical Field

[0001] The present invention relates to the field of automated testing technology, and in particular to a method and system for automated receiving testing of a digital TR component. Background Art

[0002] The input and output signals of the existing traditional test object TR component are RF analog signals, and the industry measurement instruments are analog signal tests. The measurement instruments include vector network analyzers, signal sources, spectrum analyzers and other equipment. For example, when performing receiving mode tests, they include receiving phase consistency tests and amplitude tests. During the test, since the measuring instruments are all analog signals, and with the digital development of the test object, the existing measuring instruments cannot directly receive digital signals, and cannot be quickly switched in various test environments. Therefore, how to switch the receiving test scenarios of digital devices is a problem that needs to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a digital TR component automatic receiving test system and method, which realizes the rapid switching and automated testing process of the digital TR component in various receiving test scenarios through the switching of the switch matrix and the digital processing of the digital signal processing device.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] On the one hand, the present application provides a digital TR component automatic reception test method, comprising the following steps:

[0006] S1, load the test items of receiving phase consistency test and receiving gain test respectively;

[0007] S2. When the corresponding test item needs to be executed, the switch matrix, the digital TR component and the digital signal processing device are configured, and a device switching instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component;

[0008] S3, when starting to execute the corresponding test item, a port switching instruction for switching the test channel and the test interface is sent to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment;

[0009] S4, digital TR component and digital signal processing equipment respectively receive the RF signal sent by the test equipment through the switch matrix, and after digital processing, the digital signal is output to the automatic test software;

[0010] S5. The automatic test software calls the FFT algorithm to calculate the digital signal to obtain the test result corresponding to the corresponding test item, and repeats steps S3-S4 until the test of all RF ports of the digital TR component under the corresponding test item is completed.

[0011] In some specific implementations, when the test item of the receiving gain test is executed, the test device is a signal source, and the switch matrix is ​​switched to connect the signal source with the digital TR component. The specific test process is:

[0012] S100, the signal source outputs a single-tone RF signal with a frequency of F0 and a power of P0;

[0013] S200, the switch matrix receives a port switching instruction, firstly turns on the signal source and the reference receiving channel of the digital signal processing device, so that the single-tone RF signal is transmitted to the digital signal processing device along the reference receiving channel;

[0014] S300, the digital signal processing device performs digital processing on the single-tone radio frequency signal to obtain a first baseband IQ signal which is transmitted to the automatic test software;

[0015] S400, judging the frequency F0 of the first baseband IQ signal to determine whether the frequency F0 is within the receiving range of the digital TR component, and if so, sending a port switching instruction to the switch matrix to connect a radio frequency port in a channel of the digital TR component to the signal source;

[0016] S500: The signal source outputs a single-tone RF signal to the RF port currently turned on by the digital TR component, and the digital TR component digitally processes the single-tone RF signal to obtain a second baseband IQ signal and outputs it to the digital signal processing device;

[0017] S600, the automatic test software receives the transparently transmitted second baseband IQ signal from the digital signal processing device, calls the FFT algorithm, calculates the amplitudes of the first baseband IQ signal and the second baseband IQ signal, and obtains a receiving gain test result.

[0018] In some specific implementations, the process of obtaining the first baseband IQ signal and the second baseband IQ signal is:

[0019] After synchronously collecting the single-tone radio frequency signal, sampling data is obtained, and after digital down-conversion processing is performed on the sampling data, a digital signal is obtained. The digital down-conversion process includes extraction, filtering and interpolation processing processes performed in sequence.

[0020] In some specific implementations, when the test item of the receiving phase consistency test is performed, the test equipment is a vector network analyzer, the switch matrix is ​​switched to the vector network analyzer and connected to the digital TR component, and the specific test process is:

[0021] S110, the vector network analyzer outputs a single-tone signal with a frequency of F0, and a power divider in the switch matrix divides the single-tone signal into a first radio frequency signal and a second radio frequency signal;

[0022] S120, sending a port switching instruction to the switch matrix to connect a radio frequency port in a channel of the digital TR component to the vector network analyzer;

[0023] S130, the first RF signal is transmitted to the digital signal processing device along the reference receiving channel, and the second RF signal is output to the digital TR component along the currently turned-on RF port;

[0024] S140, the first RF signal is digitally processed by a digital signal device to obtain a first baseband signal, and the second RF signal is digitally processed by a digital TR component to obtain a second baseband signal, which is output to the automatic test software;

[0025] S150, the automated test receives the first baseband signal and the second baseband signal, and calls the FFT algorithm to calculate the phase difference between the first baseband signal and the second baseband signal, to obtain the receiving phase consistency test result of the RF port currently turned on by the digital TR component.

[0026] In some specific implementations, the process of obtaining the first baseband signal and the second baseband signal is:

[0027] After synchronously collecting the radio frequency signal, sampling data is obtained, and after digital down-conversion processing is performed on the sampling data, a digital signal is obtained. The digital down-conversion process includes extraction, filtering and interpolation processing processes performed in sequence.

[0028] In a second aspect, the present application provides a digital TR component automatic receiving test system, including a test device, a switch matrix, a digital TR component, a digital signal processing device and an automatic test device, wherein the test device includes a vector network analyzer and a signal source, wherein:

[0029] The switch matrix is ​​used to switch the test equipment connected to the digital TR component according to the test item currently being executed, switch the reference channel of the digital signal processing device to the receiving reference channel, and switch the RF port currently being tested by the digital TR component;

[0030] The digital TR component is used to receive the radio frequency signal output from the test equipment from the currently turned-on radio frequency port through the switch matrix, and obtain the first digital signal after digital processing of the radio frequency signal, and send it to the digital signal processing device;

[0031] The digital signal processing device is used to receive the radio frequency signal output by the test device from the reference channel through the switch matrix, obtain the second digital signal after digital processing of the radio frequency signal, and send the first digital signal and the second digital signal to the automatic test device;

[0032] The automatic testing device is installed with automatic testing software, which uses the FFT algorithm to calculate the first digital signal and the second digital signal to obtain the test result corresponding to the test item currently executed by the digital TR component.

[0033] In some specific embodiments, the switch matrix includes a power divider, a test equipment switching switch module, a mode selection switch, a channel selection switch, and a plurality of interface selection switches corresponding to each test channel, wherein the input end of the power divider is connected to the signal output end of the vector network analyzer, the output end is connected to the input end of the test equipment switching switch module, the output end of the test equipment switching switch module is respectively connected to the switch ends of the channel selection switch and the mode selection switch, the gating end of the mode selection switch is respectively connected to the DA end and the AD end of the digital signal processing device, the gating end of the channel selection switch is respectively connected to the switch end of each interface selection switch, and the output end of each interface selection switch is respectively connected to the RF port of the digital TR component, which is used to gate the test channel of the digital TR component.

[0034] In some specific implementations, the test equipment switching switch module includes a first selection switch, a second selection switch, and a third selection switch, wherein the first selection switch, the second selection switch, and the third selection switch are all single-pole double-throw switches, including a switch end and two selection ends, wherein:

[0035] The switch end of the first selection switch is connected to the switch end of the mode selection switch, the selection end of the first selection switch is respectively connected to the output end of the power divider and the selection end of the second selection switch, the switch end of the second selection switch is connected to the output end of the signal source, the selection end of the third selection switch is respectively connected to the output end of the power divider and the selection end of the second selection switch, and the switch end of the third selection switch is connected to the switch end of the channel selection switch.

[0036] In some specific implementations, if the test item currently being executed is a receiving gain test, the action process of the switch matrix is:

[0037] Switching the first selection switch to the gating end connected to the second selection switch, and switching the second selection switch to the gating end connected to the first selection switch, so that the radio frequency signal output by the signal source is transmitted along the second switching switch and the first switching switch;

[0038] Switching the mode selection switch to the strobe end connected to the receiving reference channel so that the radio frequency signal is transmitted along the receiving reference channel to the AD port of the digital signal processing device;

[0039] If the frequency of the current RF signal is within the receiving range of the digital TR component, the switch of the second selection switch is switched to the gate end connected to the third switch, and the switch of the third switch is switched to the gate end connected to the second selection switch, so that the RF signal is transmitted to the channel selection switch along the second switch and the third switch;

[0040] The channel selection switch is used to select the current test channel of the digital TR component;

[0041] The interface selection switch is used to select the current test interface in the current test channel, and the RF signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0042] In some specific implementations, if the test item currently being executed is a receive phase consistency test, the action process of the switch matrix is:

[0043] The power divider is used to divide the single-tone signal sent by the vector network analyzer into a first radio frequency signal and a second radio frequency signal;

[0044] Switch the first selection switch to the gate end connected to the power divider, and switch the third switch to the gate end connected to the power divider, so that the first radio frequency signal is transmitted to the mode selection switch along the first selection switch, and the second radio frequency signal is transmitted to the channel selection switch along the third switch;

[0045] Switching the mode selection switch to the strobe end connected to the receiving reference channel, so that the first radio frequency signal is transmitted to the AD port of the digital signal processing device along the receiving reference channel;

[0046] The channel selection switch is used to select the current test channel of the digital TR component;

[0047] The interface selection switch is used to select the current test interface in the current test channel, and the second radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] This application uses digital signal processing equipment and a switch matrix to switch test equipment and conduct test processes for different reception scenarios. The RF signal emitted by the test equipment is digitally processed and then transmitted to the automatic test software for automated testing.

[0050] When performing a receiving consistency test, the reference signal sent by the vector network analyzer is divided into two paths through the switch matrix. One path is sent to the digital signal processing device for digital conversion into a digital signal to obtain a first baseband signal as a reference, and the other path is sent to the RF port currently tested by the digital TR component through the switch matrix. After the TR component digitally converts the output second baseband signal, the first baseband signal and the second baseband signal are transparently transmitted to the automatic test software through the digital signal processing device to perform a receiving phase consistency test.

[0051] When performing a receiving gain test, the frequency of the single-tone RF signal emitted by the signal source is first determined to see if it is within the test range of the digital TR component. If so, the first baseband IQ signal obtained after the digital signal processing device processes the single-tone RF signal and the second baseband IQ signal obtained after the digital TR component digitally processes the single-tone RF signal are transmitted to the automatic test software for receiving gain testing.

[0052] By switching each interface of each channel using a switch matrix, automated testing of the RF port of the digital TR component is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of an automatic receiving test system provided by an embodiment of the present invention;

[0054] Figure 2 A signal flow diagram for receiving gain testing provided by an embodiment of the present invention;

[0055] Figure 3 A signal flow diagram for a receiving phase consistency test provided by an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of an automatic testing system provided by an embodiment of the present invention;

[0057] Figure 5 A flow chart of a receiving test method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] The relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0060] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0061] Additionally, descriptions of well-known structures, functions, and configurations may be omitted for clarity and conciseness.One of ordinary skill in the art will recognize that various changes and modifications may be made to the examples described herein without departing from the spirit and scope of the present disclosure.

[0062] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0063] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0064] Example 1

[0065] like Figure 1 As shown, this embodiment provides a digital TR component automatic receiving test system, including a test device, a switch matrix, a digital TR component, a digital signal processing device and an automatic test device, wherein the digital TR component and the digital signal processing device are connected via a high-speed digital optical fiber communication; the test device includes a vector network analyzer and a signal source, wherein:

[0066] The switch matrix is ​​used to switch the test equipment connected to the digital TR component according to the test item currently being executed, switch the reference channel of the digital signal processing device to the receiving reference channel, and switch the RF port currently being tested by the digital TR component;

[0067] The digital TR component is used to receive the radio frequency signal output from the test equipment from the currently turned-on radio frequency port through the switch matrix, and obtain the first digital signal after digital processing of the radio frequency signal, and send it to the digital signal processing device;

[0068] The digital signal processing device is used to receive the radio frequency signal output by the test device from the reference channel through the switch matrix, obtain the second digital signal after digital processing of the radio frequency signal, and send the first digital signal and the second digital signal to the automatic test device;

[0069] The automatic testing device is installed with automatic testing software, which uses the FFT algorithm to calculate the first digital signal and the second digital signal to obtain the test result corresponding to the test item currently executed by the digital TR component.

[0070] Specifically, the switch matrix includes a power divider 6, a test equipment switching switch module, a mode selection switch 7, a channel selection switch 1, and a plurality of interface selection switches 2 to 5 corresponding to each test channel, wherein the input end of the power divider 6 is connected to the signal output end P1 of the vector network analyzer, and the output end is connected to the input end of the test equipment switching switch module, the output end of the test equipment switching switch module is respectively connected to the switch ends of the channel selection switch 1 and the mode selection switch 7, the gating end of the mode selection switch 7 is respectively connected to the DA end and the AD end of the digital signal processing device, the gating end of the channel selection switch is respectively connected to the switch end of each interface selection switch, and the output end of each interface selection switch is respectively connected to the RF port of the digital TR component. It is used to gating the test channel of the digital TR component.

[0071] In order to realize the switching of the test equipment, the test equipment switching switch module includes a first selection switch 8, a second selection switch 9 and a third selection switch 10, wherein the first selection switch 8, the second selection switch 9 and the third selection switch 10 are all single-pole double-throw switches, including a switch end and two selection ends, wherein:

[0072] The switch end of the first selection switch 8 is connected to the switch end of the mode selection switch 7, the selection end of the first selection switch 8 is respectively connected to the output end of the power divider 6 and the selection end of the second selection switch 9, the switch end of the second selection switch 9 is connected to the output end of the signal source, the selection end of the third selection switch 10 is respectively connected to the output end of the power divider 6 and the selection end of the second selection switch 9, and the switch end of the third selection switch 10 is connected to the switch end of the channel selection switch 1.

[0073] like Figure 2 As shown in the figure, if the test item currently being executed is the receiving gain test, the action process of the switch matrix is:

[0074] Switch the first selection switch 8 to the gate end connected to the second selection switch 9, and switch the second selection switch 9 to the gate end connected to the first selection switch 8, so that the radio frequency signal output by the signal source is transmitted along the second switching switch 9 and the first switching switch 8;

[0075] Switching the mode selection switch 7 to the gate end connected to the receiving reference channel (R) enables the radio frequency signal to be transmitted to the AD port of the digital signal processing device along the receiving reference channel (R);

[0076] If the frequency of the current RF signal is within the receiving range of the digital TR component, the switch of the second selection switch 9 is switched to the gating end connected to the third switching switch 10, and the switch of the third switching switch 10 is switched to the gating end connected to the second selection switch 9, so that the RF signal is transmitted to the channel selection switch 1 along the second switching switch 9 and the third switching switch 10;

[0077] Channel selection switch 1 is used to select the current test channel of the digital TR component;

[0078] The interface selection switch 1 is used to select the current test interface in the current test channel, and the radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0079] like Figure 3 As shown, if the test item currently being executed is a receive phase consistency test, the action process of the switch matrix is:

[0080] The power divider 6 is used to divide the single-tone signal emitted by the vector network analyzer into a first radio frequency signal and a second radio frequency signal;

[0081] Switch the first selection switch 8 to the gate end connected to the power divider 6, and switch the third switch 10 to the gate end connected to the power divider 6, so that the first RF signal is transmitted to the mode selection switch 7 along the first selection switch 8, and the second RF signal is transmitted to the channel selection switch 1 along the third switch 10;

[0082] Switching the mode selection switch 7 to the gate end connected to the receiving reference channel (R) enables the first radio frequency signal to be transmitted to the AD port of the digital signal processing device along the receiving reference channel (R);

[0083] The channel selection switch is used to select the current test channel of the digital TR component;

[0084] The interface selection switch is used to select the current test interface in the current test channel, and the second radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

[0085] It can be understood that the RF signal output port P1 of the vector network analyzer is connected to the input port of the power divider 6, and a single-tone signal with a frequency of F0 and a power of P0 is output from the output port P1. The single-tone signal is then split into two signals, namely a first RF signal and a second RF signal, through the power divider 6. The second RF signal is output to the receiving reference channel (R) or the transmitting reference channel (L) through the mode selection switch 7. The signal source outputs a single-tone signal with a frequency of F0 and a power of P0. It is necessary to first determine whether it is within the test range. When the system is configured for receiving test, the mode selection switch 7 is switched to the receiving reference channel (R), and the second RF signal is output to the AD port of the digital signal processing device through the receiving reference channel (R). Since the digital TR component has multiple channels, this embodiment takes a four-channel digital TR component as an example, therefore, the channel selection switch 1 is a single-pole four-throw switch, corresponding to the number of channels of the digital TR component. When testing, the channel selection switch can be controlled to switch to each channel in turn. Each channel of the digital TR component corresponds to multiple RF ports. Therefore, an interface selection switch is also required to be set to transmit the first RF signal to each RF port of each channel in turn when each channel is tested. The number of interface selection switches corresponds to the number of channels. This embodiment is provided with four interface selection switches 2, 3, 4, and 5, each of which corresponds to 8 RF ports connected to the digital TR component.

[0086] When the test item is a receiving phase consistency test, the first RF signal is processed by the digital TR component to obtain a first baseband IQ signal, which is transmitted to the digital signal processing device through a high-speed digital optical fiber. After the digital signal processing device receives the second RF signal from the receiving reference channel, it is synchronously sampled and digitally down-converted inside the digital signal processing device to a second baseband IQ signal, wherein the baseband IQ data is a digital baseband signal after the RF signal is sampled and digitally down-converted, sampling is the digitization of the RF signal, and digital down-conversion is the baseband IQ signal after the digitized RF signal is extracted, filtered, and interpolated. Finally, the digital signal processing device transparently transmits the first baseband IQ signal and the second baseband IQ signal to the automatic test device (an industrial computer is used in this embodiment), and the automatic test software in the industrial computer calls the FFT algorithm, and performs FFT algorithm calculations on the first baseband IQ signal and the second baseband IQ signal, respectively, to obtain the phase PH1 of the channel interface corresponding to the digital TR component and the phase PH0 transmitted through the reference channel, and the receiving phase consistency test result is recorded as: PH1-PH0;

[0087] When the test item executed is the receiving gain test, the signal source outputs a single-tone signal with a frequency of F0 and a power of P0 to the RF port of the digital TR component; the digital TR component outputs baseband IQ data to the digital signal processing device through a high-speed digital optical fiber; the digital signal processing device transparently transmits the baseband IQ data to the industrial computer, and the automatic test software calls the FFT algorithm to calculate the amplitude P1 of the baseband IQ data; the receiving gain is recorded: P1-P0+δ(input link loss).

[0088] like Figure 4 As shown, this embodiment also provides a multi-channel digital TR component automatic test system, which includes not only a receiving test but also other test processes. The switch matrix also includes a first switch 8 (in order to achieve compatibility between the receiving phase and the transmitting phase consistency test system, the first switch 8 can be set as a three-terminal switch, so that it can be directly connected to the vector network analyzer when performing the transmitting phase consistency test, and can receive the RF signal sent by the power divider 6 when performing the receiving phase consistency test), a fourth switch 11, a fifth switch 12, a sixth switch 13, a seventh switch 14, and an eighth switch 15. Except that the sixth switch 13 adopts a four-to-one switch and the seventh switch 14 adopts a double-pole double-throw switch, the remaining switches adopt single-pole double-throw switches. The two ports P1 and P2 of the vector network analyzer, the port P1 is connected to the input end of the power divider 6, the output end of the power divider is connected to the first switch 8 and the second switch 9, the gate end of the second switch 9 is connected to the noise source, the switch end of the fourth switch 11 is connected to the J1 port of the seventh switch 14, and the switch end of the first switch 8 is connected to the J2 port of the seventh switch 14. The first switching switch 8 is connected to the switching end of the mode switching switch 7, the other gating end of the first switching switch 8 is connected to the switching end of the fifth switching switch 12, the gating end of the fifth switching switch 12 is respectively connected to the gating end of the second switching switch 9 and the gating end of the third switching switch 10, the gating end of the second switching switch 9 is connected to the gating end of the third switching switch 10, the switching end of the second switching switch 9 is connected to the switching end of the sixth switching switch 13, and the gating end of the sixth switching switch 13 is respectively connected to the signal source, the first attenuator (connected to the power meter), the second attenuator (connected to the spectrum analyzer) and the vector network The P2 port of the analyzer, the switch end of the third switching switch 10 is connected to the J3 port of the seventh switching switch 14, the J2 port of the seventh switching switch 14 is connected to the switch end of the channel switching switch 1, and the J4 port is connected to the switch end of the eighth switching switch 15, the J1-J4 ports of the channel switching switch 1 are respectively connected to the switch ends of the interface switching switches 2-5, and the selection end of the eighth switching switch 15 is respectively connected to the RF end of the time-frequency optical transmitting device. When different test items are required, it is only necessary to control the corresponding switch action in the switch matrix to switch to the corresponding test link.

[0089] Example 2

[0090] like Figure 5 As shown, this embodiment provides a digital TR component automatic reception test method, comprising the following steps:

[0091] S1, load the test items of receiving phase consistency test and receiving gain test respectively;

[0092] S2. When the corresponding test item needs to be executed, the switch matrix, the digital TR component and the digital signal processing device are configured, and a device switching instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component;

[0093] S3, when starting to execute the corresponding test item, a port switching instruction for switching the test channel and the test interface is sent to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment;

[0094] S4, digital TR component and digital signal processing equipment respectively receive the RF signal sent by the test equipment through the switch matrix, and after digital processing, the digital signal is output to the automatic test software;

[0095] S5. The automatic test software calls the FFT algorithm to calculate the digital signal to obtain the test result corresponding to the corresponding test item, and repeats steps S3-S4 until the test of all RF ports of the digital TR component under the corresponding test item is completed.

[0096] Specifically, when the test item of receiving gain test is executed, the test device is a signal source, and the switch matrix is ​​switched to connect the signal source with the digital TR component. The specific test process is:

[0097] S100, the signal source outputs a single-tone RF signal with a frequency of F0 and a power of P0;

[0098] S200, the switch matrix receives a port switching instruction, firstly turns on the signal source and the reference receiving channel of the digital signal processing device, so that the single-tone RF signal is transmitted to the digital signal processing device along the reference receiving channel;

[0099] S300, the digital signal processing device performs digital processing on the single-tone radio frequency signal to obtain a first baseband IQ signal which is transmitted to the automatic test software;

[0100] S400, judging the frequency F0 of the first baseband IQ signal to determine whether the frequency F0 is within the receiving range of the digital TR component, and if so, sending a port switching instruction to the switch matrix to connect a radio frequency port in a channel of the digital TR component to the signal source;

[0101] S500: The signal source outputs a single-tone RF signal to the RF port currently turned on by the digital TR component, and the digital TR component digitally processes the single-tone RF signal to obtain a second baseband IQ signal and outputs it to the digital signal processing device;

[0102] S600, the automatic test software receives the transparently transmitted second baseband IQ signal from the digital signal processing device, calls the FFT algorithm, calculates the amplitudes of the first baseband IQ signal and the second baseband IQ signal, and obtains a receiving gain test result.

[0103] The digital processing process is: synchronously collect the single-tone RF signal to obtain sampling data, and digitally down-convert the sampling data to obtain a digital signal. The digital down-conversion process includes extraction, filtering and interpolation processing in sequence.

[0104] In the prior art, the receiving phase consistency test of the TR component is generally performed by testing the phase of the TR component channel to be tested through a vector network analyzer, and the test results are transmitted back to the mobile terminal for phase consistency test. However, the vector network analyzer generally sends RF analog signals. With the digitization of the TR component, the digital TR component outputs a baseband digital signal. The vector network analyzer cannot directly process the baseband digital signal. In order to achieve automated testing and the number of vector network analyzers used, one vector network analyzer is generally used, and only one test channel of the TR component is connected each time. When performing the receiving phase consistency test, the phase of other channels cannot be used as a reference for testing.

[0105] Therefore, when the test item of receiving phase consistency test is executed, the test equipment is a vector network analyzer, the switch matrix is ​​switched to the vector network analyzer and connected to the digital TR component, and the specific test process of the automatic test software is as follows:

[0106] S110, setting the test mode of the current digital TR component to receive phase consistency test and generating control parameters for sending, and the switch matrix, digital TR component and digital signal processing device perform mode configuration according to the control parameters;

[0107] S210, opening the automatic test program, sending a port switching instruction for switching the test channel and the test interface to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the vector network analyzer;

[0108] S310, receiving a first baseband signal and a second baseband signal transparently transmitted by a digital signal processing device, wherein the second baseband signal is an output signal corresponding to a currently turned-on RF port, and the first baseband signal is a reference signal sent by the digital signal processing device, and a frequency of the reference signal is the same as a frequency of an output signal of the digital TR component;

[0109] The process of obtaining the first baseband signal is:

[0110] S311, receiving a single tone signal sent by a vector network analyzer;

[0111] S312, the switch matrix splits the single-tone signal into a first analog signal and a second analog signal, and sends the second analog signal to the digital TR component along the currently turned-on RF port;

[0112] S313, the second analog signal is digitized by the digital TR component to obtain a second baseband signal;

[0113] S314: Output the second baseband signal to a digital signal processing device.

[0114] The specific process of obtaining the first baseband signal is:

[0115] S321, when the automatic test program is turned on, a switch switching instruction for mode selection switching is also sent to the switch matrix, so that the switch matrix sends the first analog signal to the AD port of the digital signal processing device;

[0116] S322, synchronously sampling the first analog signal to obtain sampling data;

[0117] S323, performing digital down-conversion processing on the sampled data to obtain a first baseband signal, wherein the digital down-conversion processing includes sequentially performing decimation, filtering, and interpolation processing.

[0118] S410, calling an FFT algorithm to calculate phase values ​​of the first baseband signal and the second baseband signal to obtain a first phase of the first baseband signal and a second phase of the second baseband signal;

[0119] S510, calculating the difference between the first phase and the second phase, and obtaining a receiving phase consistency test result of the RF port currently turned on by the digital TR component;

[0120] S610, repeat steps S210-S510 until the test of all RF ports of the digital TR component is completed.

[0121] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A digital TR component automatic reception test method, characterized in that: The following steps are involved: S1, load the test items of receiving phase consistency test and receiving gain test respectively; S2. When the corresponding test item needs to be executed, the switch matrix, the digital TR component and the digital signal processing device are configured, and a device switching instruction for switching the test device is sent to the switch matrix, so that the test device corresponding to the current test item is connected to the digital TR component; S3, when starting to execute the corresponding test item, a port switching instruction for switching the test channel and the test interface is sent to the switch matrix, so that a radio frequency port in a channel of the digital TR component is connected to the corresponding test equipment; S4, digital TR component and digital signal processing equipment respectively receive the RF signal sent by the test equipment through the switch matrix, and after digital processing, the digital signal is output to the automatic test software; S5. The automatic test software calls the FFT algorithm to calculate the digital signal to obtain the test result corresponding to the corresponding test item, and repeats steps S3-S4 until the test of all RF ports of the digital TR component under the corresponding test item is completed.

2. The digital TR component automatic reception test method according to claim 1, characterized in that: When the test item of receiving gain test is executed, the test equipment is the signal source, and the switch matrix is ​​switched to connect the signal source and the digital TR component. The specific test process is as follows: S100, the signal source outputs a single-tone RF signal with a frequency of F0 and a power of P0; S200, the switch matrix receives a port switching instruction, firstly switches on the signal source and the reference receiving channel of the digital signal processing device, so that the single-tone RF signal is transmitted to the digital signal processing device along the reference receiving channel; S300, the digital signal processing device performs digital processing on the single-tone radio frequency signal to obtain a first baseband IQ signal which is transmitted to the automatic test software; S400, judging the frequency F0 of the first baseband IQ signal to determine whether the frequency F0 is within the receiving range of the digital TR component, and if so, sending a port switching instruction to the switch matrix to connect a radio frequency port in a channel of the digital TR component to the signal source; S500: The signal source outputs a single-tone RF signal to the RF port currently turned on by the digital TR component, and the digital TR component digitally processes the single-tone RF signal to obtain a second baseband IQ signal and outputs it to the digital signal processing device; S600, the automatic test software receives the transparently transmitted second baseband IQ signal from the digital signal processing device, calls the FFT algorithm, calculates the amplitudes of the first baseband IQ signal and the second baseband IQ signal, and obtains a receiving gain test result.

3. The digital TR component automatic reception test method according to claim 2, characterized in that: The process of obtaining the first baseband IQ signal and the second baseband IQ signal is: After synchronously collecting the single-tone radio frequency signal, sampling data is obtained, and after digital down-conversion processing is performed on the sampling data, a digital signal is obtained. The digital down-conversion process includes extraction, filtering and interpolation processing processes performed in sequence.

4. The digital TR component automatic receiving test method according to claim 1, characterized in that: When the test item of receiving phase consistency test is executed, the test equipment is a vector network analyzer, and the switch matrix is ​​switched to the vector network analyzer and connected to the digital TR component. The specific test process is as follows: S110, the vector network analyzer outputs a single-tone signal with a frequency of F0, and a power divider in the switch matrix divides the single-tone signal into a first radio frequency signal and a second radio frequency signal; S120, sending a port switching instruction to the switch matrix to connect a radio frequency port in a channel of the digital TR component to the vector network analyzer; S130, the first RF signal is transmitted to the digital signal processing device along the reference receiving channel, and the second RF signal is output to the digital TR component along the currently turned-on RF port; S140, the first RF signal is digitally processed by a digital signal device to obtain a first baseband signal, and the second RF signal is digitally processed by a digital TR component to obtain a second baseband signal, which is output to the automatic test software; S150, the automated test receives the first baseband signal and the second baseband signal, and calls the FFT algorithm to calculate the phase difference between the first baseband signal and the second baseband signal, to obtain the receiving phase consistency test result of the RF port currently turned on by the digital TR component.

5. The digital TR component automatic receiving test method according to claim 4, characterized in that: The process of obtaining the first baseband signal and the second baseband signal is: After synchronously collecting the radio frequency signal, sampling data is obtained, and after digital down-conversion processing is performed on the sampling data, a digital signal is obtained. The digital down-conversion process includes extraction, filtering and interpolation processing processes performed in sequence.

6. A digital TR component automatic receiving test system, comprising a test device, characterized in that: It also includes a switch matrix, a digital TR component, a digital signal processing device, and an automatic test device. The test device includes a vector network analyzer and a signal source. The switch matrix is ​​used to switch the test equipment connected to the digital TR component according to the test item currently being executed, switch the reference channel of the digital signal processing device to the receiving reference channel, and switch the RF port currently being tested by the digital TR component; The digital TR component is used to receive the radio frequency signal output from the test equipment from the currently turned-on radio frequency port through the switch matrix, and obtain the first digital signal after digital processing of the radio frequency signal, and send it to the digital signal processing device; The digital signal processing device is used to receive the radio frequency signal output by the test device from the reference channel through the switch matrix, obtain the second digital signal after digital processing of the radio frequency signal, and send the first digital signal and the second digital signal to the automatic test device; The automatic testing device is installed with automatic testing software, which uses the FFT algorithm to calculate the first digital signal and the second digital signal to obtain the test result corresponding to the test item currently executed by the digital TR component.

7. The digital TR component automatic receiving test system according to claim 6, characterized in that: The switch matrix includes a power divider, a test equipment switching switch module, a mode selection switch, a channel selection switch, and a plurality of interface selection switches corresponding to each test channel, wherein the input end of the power divider is connected to the signal output end of the vector network analyzer, the output end is connected to the input end of the test equipment switching switch module, the output end of the test equipment switching switch module is respectively connected to the switch ends of the channel selection switch and the mode selection switch, the gating end of the mode selection switch is respectively connected to the DA end and the AD end of the digital signal processing device, the gating end of the channel selection switch is respectively connected to the switch end of each interface selection switch, and the output end of each interface selection switch is respectively connected to the RF port of the digital TR component. It is used to gating the test channel of the digital TR component.

8. The digital TR component automatic receiving test system according to claim 7, characterized in that: The test equipment switching switch module includes a first selection switch, a second selection switch and a third selection switch, wherein the first selection switch, the second selection switch and the third selection switch all adopt single-pole double-throw switches, including a switch end and two selection ends, wherein, The switch end of the first selection switch is connected to the switch end of the mode selection switch, the selection end of the first selection switch is respectively connected to the output end of the power divider and the selection end of the second selection switch, the switch end of the second selection switch is connected to the output end of the signal source, the selection end of the third selection switch is respectively connected to the output end of the power divider and the selection end of the second selection switch, and the switch end of the third selection switch is connected to the switch end of the channel selection switch.

9. The digital TR component automatic receiving test system according to claim 8, characterized in that: If the test item currently being executed is the receive gain test, the action process of the switch matrix is: Switching the first selection switch to the gating end connected to the second selection switch, and switching the second selection switch to the gating end connected to the first selection switch, so that the radio frequency signal output by the signal source is transmitted along the second switching switch and the first switching switch; Switching the mode selection switch to the strobe end connected to the receiving reference channel so that the radio frequency signal is transmitted along the receiving reference channel to the AD port of the digital signal processing device; If the frequency of the current RF signal is within the receiving range of the digital TR component, the switch of the second selection switch is switched to the gate end connected to the third switch, and the switch of the third switch is switched to the gate end connected to the second selection switch, so that the RF signal is transmitted to the channel selection switch along the second switch and the third switch; The channel selection switch is used to select the current test channel of the digital TR component; The interface selection switch is used to select the current test interface in the current test channel, and the RF signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

10. The digital TR component automatic receiving test system according to claim 8, characterized in that: If the test item currently being executed is the receive phase consistency test, the action process of the switch matrix is: The power divider is used to divide the single-tone signal emitted by the vector network analyzer into a first radio frequency signal and a second radio frequency signal; Switch the first selection switch to the gate end connected to the power divider, and switch the third switch to the gate end connected to the power divider, so that the first radio frequency signal is transmitted to the mode selection switch along the first selection switch, and the second radio frequency signal is transmitted to the channel selection switch along the third switch; Switching the mode selection switch to the strobe end connected to the receiving reference channel, so that the first radio frequency signal is transmitted to the AD port of the digital signal processing device along the receiving reference channel; The channel selection switch is used to select the current test channel of the digital TR component; The interface selection switch is used to select the current test interface in the current test channel, and the second radio frequency signal is transmitted to the digital TR component along the selected current test channel and the current test interface.

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