Satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function test system and method

Abstract

The invention relates to a satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function test system and method. The system comprises a microwave anechoic chamber, a service end transmitting antenna, a feed end receiving antenna, a signal source link, a receiving link and a control processing part. A turntable system for placing a transparent reverse forwarding tested piece is arranged on one side, far away from the service end transmitting antenna and the feed end receiving antenna, in the microwave anechoic chamber; the signal source link comprises a broadband signal source, a first amplifier and a power divider, and the control processing part comprises an Ethernet interface, an upper computer and a ground measurement device. The method has the advantages that a broadband signal source is used for generating multi-tone signals at the same time, and a single-signal-source simulation multi-beam multi-target-point test is achieved by configuring frequency selection of each receiving beam frequency; the oscilloscope is used for collecting feed service signals and conducting digital filtering and time domain reduction, terminal service signals of different targets are separated out, reverse hopping beam communication function detection is achieved through a digital method, and universality is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of forwarding satellite communication payload function testing, and more particularly to a satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function testing system and method. Background Art

[0002] In satellite transparent reverse forwarding, each receiving beam of the communication payload independently receives terminal service signals of different targets, inputs them into the analog transparent repeater, and after processing by the analog transparent repeater, frequency conversion is used to generate a single-beam feed service signal, which is transmitted to the gateway station.

[0003] The satellite provides periodic beam coverage for the ground terminal at a fixed time. During reverse forwarding, each receiving beam of the communication payload must point to its respective ground target according to the planned time and stay for a specified period of time to realize its beam-hopping communication function.

[0004] To verify the above functions, the satellite communication payload needs to implement reverse forwarding multi-beam multi-target point hopping beam communication function test on the ground. The difficulty of this function test lies in:

[0005] 1. To simulate multiple target points, multiple signals need to be generated simultaneously. Conventional methods use multiple signal sources, which occupies more instrument resources.

[0006] 2. The feed service signal contains terminal service signals of different targets at the same time. During beam hopping testing, the terminal signals need to be distinguished. Conventional methods use multiple sets of filtering components, which are hardware-fixed and not very universal.

[0007] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0008] The purpose of the present invention is to provide a satellite transparent reverse forwarding multi-beam multi-target point beam hopping communication function test system and method, which realizes the test of multi-beam multi-target point simulation by a single signal source and realizes reverse beam hopping communication function detection, and has stronger versatility.

[0009] The present invention provides a satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function test system, comprising a microwave darkroom, a business end transmitting antenna, a feed end receiving antenna, a signal source link, a receiving link and a control processing part; the business end transmitting antenna and the feed end receiving antenna are placed in the microwave darkroom, the business end transmitting antenna and the feed end receiving antenna are located on the same side, and a turntable system for placing a transparent reverse forwarding test piece is provided on a side of the microwave darkroom away from the business end transmitting antenna and the feed end receiving antenna; the signal source link comprises a broadband signal source, a first amplifier and a power divider, the power divider is connected to the business end transmitting antenna, one end of the first amplifier and the power divider are connected to the business end transmitting antenna, and one end of the first amplifier and the power divider are connected to the power divider. The power divider is connected, and the other end of the first amplifier is connected to the broadband signal source; the control processing part includes an Ethernet interface, a host computer and a ground measurement device, the ground measurement device is connected to the transparent reverse forwarding device under test, and the other end of the ground measurement device is connected to the host computer, and the host computer is connected to the Ethernet interface; the receiving link includes a mixer, a point frequency signal source, a second amplifier and an oscilloscope, the mixer is connected to the feeding end receiving antenna, the mixer is also connected to the point frequency signal source and the second amplifier, and the other end of the second amplifier is connected to the oscilloscope; the broadband signal source, the oscilloscope and the point frequency signal source are all connected to the Ethernet interface.

[0010] Furthermore, the interior of the microwave anechoic chamber is in the shape of a rectangular parallelepiped, with a length, width and height of 17 meters, 13.5 meters and 10 meters respectively; the center of the transparent reverse forwarding device under test is 2.5 meters above the ground and 6.8 meters from the top of the absorbing material; the distance between the business end transmitting antenna and the feeding end receiving antenna and the transparent reverse forwarding device under test is 13 meters.

[0011] Furthermore, the service end transmitting antenna is four Ku feed horn antennas, and the four Ku feed horn antennas all point to the receiving antenna of the transparent reverse forwarding device under test; the feeding end receiving antenna is two Q / V feed horn antennas, and the two Q / V feed horn antennas both point to the transmitting antenna of the transparent reverse forwarding device under test.

[0012] Furthermore, the four Ku feed horn antennas are arranged in a square, and the four Ku feed horn antennas are respectively located at the four corners of the square; the two Q / V feed horn antennas are located below the four Ku feed horn antennas, and the two Q / V feed horn antennas are located on the same straight line.

[0013] Furthermore, the model of the broadband signal source is SMW200A, and the gain of the first amplifier is 50dB; the broadband signal source is controlled by a host computer, and the broadband signal source generates 4 test signals of different frequency bands in the Ku band corresponding to the 4 receiving beam frequencies of the transparent reverse forwarding device under test.

[0014] Furthermore, the model of the oscilloscope is MDO34, and the gain of the second amplifier is 50 dB; the oscilloscope is program-controlled by a host computer, and the oscilloscope uploads the collected data to the host computer through an Ethernet interface.

[0015] Furthermore, the ground measurement equipment is configured with four receiving beam frequencies for transparently forwarding the device under test, and each of the four receiving beam frequencies corresponds to one of the test signals in four different Ku-band frequency bands for frequency selection.

[0016] The present invention also provides a testing method, which is applied to the above-mentioned satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function testing system.

[0017] Furthermore, the testing method comprises the following steps:

[0018] S1: A broadband signal source simulates the service signal of a terminal. It generates four-tone test signals simultaneously according to the waveform file, inputs them into the first amplifier for amplification, and then splits them through the power divider to four Ku-feed horn antennas, simulating the service terminals of four targets in a microwave anechoic chamber.

[0019] S2: The broadband signal source generates four test signals of different Ku-band frequency bands, corresponding to the four receiving beam frequencies of the device under test that are transparently forwarded in reverse.

[0020] S3: The mixer and the point frequency signal source form a down-conversion system. The transparent reverse forwarding of the DUT feed signal received from the Q / V feed horn antenna is converted to 0.5-1GHz by the down-conversion system. After amplification by the second amplifier, the signal is input to the oscilloscope for acquisition. The oscilloscope uploads the acquired data to the host computer via the Ethernet interface.

[0021] S4: The host computer controls the ground test equipment to send transparent reverse forwarding instructions related to the device under test, controls the instrument and reads the data, processes and interprets the data;

[0022] S5: The ground test equipment controls and records the transparent reverse forwarding device under test, and configures the corresponding parameters of the transparent reverse forwarding device under test;

[0023] S6: The host computer collects the down-converted feed service signal through the oscilloscope, reads it with MATLAB software, and uses the pre-designed Simulink module to filter and restore the digital signal in the time domain, separating the terminal service signal simulation diagrams of different targets. The data results are interpreted according to the set beam hopping pattern and dwell time.

[0024] Furthermore, the step S5 includes

[0025] S51: The ground test equipment is configured to transparently forward the four receiving beam frequencies of the device under test, each corresponding to one of the four test signals in different Ku-band bands, for frequency selection.

[0026] S52: The ground measurement equipment is configured to transparently reverse forward the four receiving beams of the device under test, pointing them to any one of the service end transmitting antennas, and performing beam switching.

[0027] The satellite transparent reverse forwarding multi-beam multi-target point beam hopping communication function test system of the present invention uses a broadband signal source to simultaneously generate multi-tone signals, and realizes the test of simulating multi-beam multi-target points with a single signal source by configuring the frequency selection of each receiving beam; uses an oscilloscope to collect the feeding service signal and performs digital filtering and time domain restoration to separate the terminal service signals of different targets, and uses digital methods to realize reverse beam hopping communication function detection, which has stronger versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A block diagram of a satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function test system provided by an embodiment of the present invention.

[0029] Figure 2 Schematic diagram of the position relationship between the service end transmitting antenna and the feed end receiving antenna.

[0030] Figure 3 A flowchart of a method for testing a satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function provided by an embodiment of the present invention.

[0031] Figure 4 This is a simulation diagram of the feeding service signal collected by an oscilloscope.

[0032] Figure 5 Simulation diagram of different target terminal service signals for digital filtering and time domain restoration.

[0033] Figure 6 This is the spectrum simulation diagram of each beam after beam separation.

[0034] The reference numerals and components in the drawings are as follows:

[0035] 1. Microwave darkroom 2. Business end transmitting antenna 3. Feed end receiving antenna

[0036] 4. Signal source link 41, broadband signal source 42, first amplifier

[0037] 43, power splitter 5, receiving chain 51, mixer

[0038] 52. Dot frequency signal source 53. Second amplifier 54. Oscilloscope

[0039] 6. Control processing part 61, Ethernet interface 62, host computer

[0040] 63. Ground test equipment 7. Transparent reverse forwarding of the device under test DETAILED DESCRIPTION

[0041] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0042] The terms "first", "second", "third", "fourth", etc. in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] Example 1

[0044] Figure 1 A schematic block diagram of a satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system provided by an embodiment of the present invention. Figure 1The satellite transparent reverse forwarding multi-beam multi-target point-hopping beam communication function test system provided by the embodiment of the present invention includes a microwave darkroom 1, a business end transmitting antenna 2, a feed end receiving antenna 3, a signal source link 4, a receiving link 5 and a control processing part 6; the business end transmitting antenna 2 and the feed end receiving antenna 3 are placed in the microwave darkroom 1, and the business end transmitting antenna 2 and the feed end receiving antenna 3 are located on the same side. A turntable system for placing a transparent reverse forwarding test piece 7 is provided on the side of the microwave darkroom 1 away from the business end transmitting antenna 2 and the feed end receiving antenna 3; the signal source link 4 includes a broadband signal source 41, a first amplifier 42 and a power divider 43, the power divider 43 is connected to the business end transmitting antenna 2, one end of the first amplifier 42 is connected to the power divider 43, and the The other end of the first amplifier 42 is connected to the broadband signal source 41; the control processing part 6 includes an Ethernet interface 61, a host computer 62 and a ground measuring device 63, the ground measuring device 63 is connected to the transparent reverse forwarding device under test 7, the other end of the ground measuring device 63 is connected to the host computer 62, and the host computer 62 is connected to the Ethernet interface 61; the receiving link 5 includes a mixer 51, a point frequency signal source 52, a second amplifier 53 and an oscilloscope 54, the mixer 51 is connected to the feeding end receiving antenna 3, the mixer 51 is also connected to the point frequency signal source 52 and the second amplifier 53, and the other end of the second amplifier 53 is connected to the oscilloscope 54; the broadband signal source 41, the oscilloscope 54 and the point frequency signal source 52 are all connected to the Ethernet interface 61.

[0045] It should be noted that the satellite transparent reverse forwarding multi-beam multi-target point beam hopping communication function test system of the present invention uses a broadband signal source 41 to simultaneously generate multi-tone signals, and by configuring the frequency selection of each receiving beam, a single signal source simulates multi-beam multi-target point test; an oscilloscope 54 is used to collect the feed service signal and perform digital filtering and time domain restoration to separate the terminal service signals of different targets, and a digital method is used to realize reverse beam hopping communication function detection, which is more versatile.

[0046] Specifically, the interior of the microwave darkroom 1 of the present invention is in the shape of a rectangular parallelepiped, with the length, width and height of the interior of the microwave darkroom 1 being 17 meters, 13.5 meters and 10 meters respectively; the center of the transparent reverse forwarding device under test 7 is 2.5 meters above the ground and 6.8 meters from the top of the absorbing material; the distance between the business end transmitting antenna 2 and the feeding end receiving antenna 3 and the transparent reverse forwarding device under test 7 is 13m.

[0047] Figure 2 This is a schematic diagram of the position relationship between the business end transmitting antenna and the feeding end receiving antenna. For further reference Figure 1 、 Figure 2The service end transmitting antenna 2 of the present invention is four Ku feed horn antennas, and the four Ku feed horn antennas all point to the receiving antenna of the transparent reverse forwarding device under test 7; the feeding end receiving antenna 3 is two Q / V feed horn antennas, and the two Q / V feed horn antennas both point to the transmitting antenna of the transparent reverse forwarding device under test 7.

[0048] Specifically, the four Ku feed horn antennas are arranged in a square, and the four Ku feed horn antennas are respectively located at the four corners of the square; the two Q / V feed horn antennas are located below the four Ku feed horn antennas, and the two Q / V feed horn antennas are located on the same straight line.

[0049] It should be noted that the four Ku-feed horn antennas have different positions and different feeder cable lengths, so the amplitudes of the multi-tone test signals sent by each horn antenna are quite different.

[0050] Furthermore, the model of the broadband signal source 41 is SMW200A, and the gain of the first amplifier 42 is 50dB; the broadband signal source 41 is program-controlled by the host computer 62, and the broadband signal source 41 generates 4 test signals of different frequency bands in the Ku band corresponding to the 4 receiving beam frequencies of the transparent reverse forwarding device under test 7; the model of the oscilloscope 54 is MDO34, and the gain of the second amplifier 53 is 50dB; the oscilloscope 54 is program-controlled by the host computer 62, and the oscilloscope 54 uploads the collected data to the host computer 62 through the Ethernet interface 61; the ground measurement equipment 63 is configured with the 4 receiving beam frequencies of the transparent reverse forwarding device under test 7, and the 4 receiving beam frequencies each correspond to one of the test signals of different frequency bands in the 4 Ku band for frequency selection.

[0051] Figure 3 This is a flow chart of a method for testing satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication functions provided by an embodiment of the present invention. Figure 3 The present invention also provides a testing method, which is applied to the above-mentioned satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function testing system.

[0052] like Figure 3 As shown, the testing method of the present invention comprises the following steps:

[0053] S1: The broadband signal source 41 simulates the service signal of the terminal and generates four-tone test signals simultaneously according to the waveform file. The signals are input to the first amplifier 42 for amplification and then split by the power divider 43 to four Ku feed horn antennas, simulating the service terminals of four targets in the microwave anechoic chamber 1.

[0054] S2: The broadband signal source 41 generates four test signals of different frequency bands in the Ku band, corresponding to the four receiving beam frequencies of the device under test 7 that are transparently forwarded in reverse;

[0055] It should be noted that the four Ku-feed horn antennas have different positions and feeder cable lengths, so the amplitudes of the multi-tone test signals sent by each horn antenna are quite different;

[0056] S3: The mixer 51 and the dot frequency signal source 52 form a down-conversion system. The transparent reverse forwarding feed signal of the device under test 7 received from the Q / V feed horn antenna is converted to 0.5-1 GHz by the down-conversion system, amplified by the second amplifier 53, and then input into the oscilloscope 54 for acquisition. The oscilloscope 54 uploads the acquired data to the host computer 62 via the Ethernet interface 61;

[0057] S4: The host computer 62 controls the ground test equipment 63 to send transparent reverse forwarding instructions to the device under test 7, controls the instrument and reads the data, processes and interprets the data;

[0058] S5: The ground test device 63 controls and records the transparent reverse forwarding device under test 7, and configures corresponding parameters of the transparent reverse forwarding device under test 7;

[0059] Figure 4 This is a simulation diagram of the feed service signal collected by the oscilloscope. Figure 5 This is a simulation diagram of different target terminal service signals using digital filtering and time domain restoration. Figure 6 This is the spectrum simulation diagram of each beam after beam separation. Please refer to Figure 4 、 Figure 5 、 Figure 6 , S6: The host computer 62 collects the down-converted feeder service signal from the oscilloscope 54 and reads it with MATLAB software (see the simulation diagram of the feeder service signal collected by the oscilloscope 54). Figure 4 ), use the pre-designed Simulink module to filter and restore the digital signal in the time domain, and separate the terminal business signal simulation diagrams of different targets (such as Figure 5 As shown), according to the set beam hopping pattern and dwell time (as shown Figure 6 Interpret the data results.

[0060] Furthermore, step S5 includes

[0061] S51: The ground test equipment 63 configures four receive beam frequencies for transparently forwarding the device under test 7, each corresponding to one of the test signals in four different Ku-band frequency bands, and performs frequency selection.

[0062] S52: The ground measurement device 63 is configured to transparently reverse forward the four receiving beams of the device under test 7, pointing to any one of the service end transmitting antennas 2, and performing beam switching.

[0063] For example, the four receiving beams are receiving beam 1, receiving beam 2, receiving beam 3, and receiving beam 4, and the four service end transmitting antennas are service end transmitting antenna Ku1, service end transmitting antenna Ku2, service end transmitting antenna Ku3, and service end transmitting antenna Ku4.

[0064] Specifically, receiving beam 1 points to the service end transmitting antenna Ku1, receiving beam 2 points to the service end transmitting antenna Ku2, receiving beam 3 points to the service end transmitting antenna Ku3, and receiving beam 4 points to the service end transmitting antenna Ku4.

[0065] It should be noted that the ground measurement equipment 63 is configured to transparently forward the DUT 7 with a dwell time of 1 ms and a beam hopping pattern of clockwise hopping.

[0066] Specifically, receiving beam 1 initially points to the service end transmitting antenna Ku1, and after dwelling for 1ms, points to the service end transmitting antenna Ku2; after dwelling for 1ms, points to the service end transmitting antenna Ku3; after dwelling for 1ms, points to the service end transmitting antenna Ku4;

[0067] Furthermore, the receiving beam 2 initially points to the service end transmitting antenna Ku2, and after dwelling for 1ms, it points to the service end transmitting antenna Ku3; after dwelling for 1ms, it points to the service end transmitting antenna Ku4; after dwelling for 1ms, it points to the service end transmitting antenna Ku1;

[0068] Furthermore, the receiving beam 3 initially points to the service end transmitting antenna Ku3, and after dwelling for 1ms, it points to the service end transmitting antenna Ku4; after dwelling for 1ms, it points to the service end transmitting antenna Ku1; after dwelling for 1ms, it points to the service end transmitting antenna Ku2;

[0069] Furthermore, the receiving beam 4 initially points to the service end transmitting antenna Ku4, and after staying for 1ms, it points to the service end transmitting antenna Ku1; after staying for 1ms, it points to the service end transmitting antenna Ku2; after staying for 1ms, it points to the service end transmitting antenna Ku3.

[0070] Based on the above description, it can be seen that the advantages of the present invention are:

[0071] The satellite transparent reverse forwarding multi-beam multi-target point beam hopping communication function test system of the present invention uses a broadband signal source to simultaneously generate multi-tone signals, and realizes the test of simulating multi-beam multi-target points with a single signal source by configuring the frequency selection of each receiving beam; uses an oscilloscope to collect the feeding service signal and performs digital filtering and time domain restoration to separate the terminal service signals of different targets, and uses digital methods to realize reverse beam hopping communication function detection, which has stronger versatility.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system, characterized in that: It includes a microwave darkroom (1), a business end transmitting antenna (2), a feed end receiving antenna (3), a signal source link (4), a receiving link (5) and a control processing part (6); The service end transmitting antenna (2) and the feed end receiving antenna (3) are placed in the microwave darkroom (1), the service end transmitting antenna (2) and the feed end receiving antenna (3) are located on the same side, and a turntable system for placing a transparent reverse forwarding device under test (7) is provided on a side of the microwave darkroom (1) away from the service end transmitting antenna (2) and the feed end receiving antenna (3); The signal source link (4) comprises a broadband signal source (41), a first amplifier (42) and a power splitter (43), wherein the power splitter (43) is connected to the service end transmitting antenna (2), one end of the first amplifier (42) is connected to the power splitter (43), and the other end of the first amplifier (42) is connected to the broadband signal source (41); The control processing part (6) includes an Ethernet interface (61), a host computer (62) and a ground measuring device (63), wherein the ground measuring device (63) is connected to the transparent reverse forwarding device under test (7), and the other end of the ground measuring device (63) is connected to the host computer (62), and the host computer (62) is connected to the Ethernet interface (61); The receiving link (5) comprises a mixer (51), a point frequency signal source (52), a second amplifier (53) and an oscilloscope (54); the mixer (51) is connected to the feeding end receiving antenna (3); the mixer (51) is also connected to the point frequency signal source (52) and the second amplifier (53); the other end of the second amplifier (53) is connected to the oscilloscope (54); The broadband signal source (41), the oscilloscope (54) and the dot frequency signal source (52) are all connected to the Ethernet interface (61).

2. The satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system according to claim 1 is characterized in that: The interior of the microwave darkroom (1) is in the shape of a rectangular parallelepiped, and the length, width and height of the interior of the microwave darkroom (1) are 17 meters, 13.5 meters and 10 meters respectively; The center of the transparent reverse forwarding device under test (7) is 2.5 meters above the ground and 6.8 meters from the top of the absorbing material; the distance between the service end transmitting antenna (2) and the feed end receiving antenna (3) and the transparent reverse forwarding device under test (7) is 13 meters.

3. The satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system according to claim 1 is characterized in that: The service end transmitting antenna (2) is four Ku feed horn antennas, and the four Ku feed horn antennas all point to the receiving antenna of the transparent reverse forwarding device under test (7); The feed end receiving antenna (3) is two Q / V feed horn antennas, and both of the two Q / V feed horn antennas point toward the transmitting antenna of the transparent reverse forwarding device under test (7).

4. The satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system according to claim 3 is characterized in that: The four Ku feed horn antennas are arranged in a square, and the four Ku feed horn antennas are respectively located at the four corners of the square; the two Q / V feed horn antennas are located below the four Ku feed horn antennas, and the two Q / V feed horn antennas are located on the same straight line.

5. The satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system according to claim 1 is characterized in that: The model of the broadband signal source (41) is SMW200A, and the gain of the first amplifier (42) is 50dB; The broadband signal source (41) is program-controlled by a host computer (62), and generates four test signals of different Ku frequency bands corresponding to four receiving beam frequencies of the transparent reverse forwarding device under test (7).

6. The satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system according to claim 1 is characterized in that: The model of the oscilloscope (54) is MDO34, and the gain of the second amplifier (53) is 50dB; The oscilloscope (54) is program-controlled by a host computer (62), and the oscilloscope (54) uploads the collected data to the host computer (62) via an Ethernet interface (61).

7. The satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system according to claim 1 is characterized in that: The ground measurement equipment (63) is configured with four receiving beam frequencies for transparently forwarding the device under test (7), and the four receiving beam frequencies each correspond to one of the test signals of four different Ku frequency bands for frequency selection.

8. A testing method, characterized in that: The test method is applied to the satellite transparent reverse forwarding multi-beam multi-target point hopping beam communication function test system described in any one of claims 1-7.

9. The testing method according to claim 8, characterized in that: The test method comprises the following steps: S1: A broadband signal source (41) simulates the service signal of a terminal, generates four-tone test signals simultaneously according to a waveform file, inputs the signals into a first amplifier (42) for amplification, and then divides the signals through a power divider (43) to four Ku feed horn antennas, simulating the service terminals of four targets in a microwave darkroom (1); S2: The broadband signal source (41) generates four test signals of different frequency bands in the Ku band, corresponding to the four receiving beam frequencies of the device under test (7) that is transparently forwarded in reverse; S3: The mixer (51) and the point frequency signal source (52) form a down-conversion system. The transparent reverse forwarding feed signal of the device under test (7) received from the Q / V feed horn antenna is converted to 0.5-1GHz by the down-conversion system, enters the second amplifier (53) for amplification, and then inputs the oscilloscope (54) for acquisition. The oscilloscope (54) uploads the acquired data to the host computer (62) through the Ethernet interface (61); S4: The host computer (62) controls the ground measuring device (63) to send transparent reverse forwarding instructions to the device under test (7), controls the instrument and reads the data, processes and interprets the data; S5: the ground test device (63) controls and records the transparent reverse forwarding device under test (7), and configures corresponding parameters of the transparent reverse forwarding device under test (7); S6: The upper computer (62) collects the down-converted feed service signal from the oscilloscope (54), reads it using MATLAB software, and uses the pre-designed Simulink module to filter and restore the digital signal in the time domain, separates the terminal service signal simulation diagrams of different targets, and interprets the data results based on the set beam hopping pattern and dwell time.

10. The testing method according to claim 9, characterized in that: The step S5 includes S51: The ground test equipment (63) is configured to transparently forward the four receiving beam frequencies of the device under test (7), each corresponding to one of the test signals in four different Ku-band frequency bands, and perform frequency selection; S52: The ground measurement equipment (63) configures four receiving beams of the device under test (7) to be transparently forwarded in reverse, pointing to any one of the service end transmitting antennas (2) and performing beam switching.

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