CN115664566A - Extensible broadband array signal simulation test system - Google Patents
Extensible broadband array signal simulation test system Download PDFInfo
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- CN115664566A CN115664566A CN202211290491.9A CN202211290491A CN115664566A CN 115664566 A CN115664566 A CN 115664566A CN 202211290491 A CN202211290491 A CN 202211290491A CN 115664566 A CN115664566 A CN 115664566A
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Abstract
The invention discloses an extensible broadband array signal simulation test system, and belongs to the technical field of communication, radar, electronic countermeasure and comprehensive radio frequency technology equipment test. The device comprises a control and signal analysis, storage and processing device, a virtual sub-array, a signal generation device, a signal receiving device, a combiner/divider, a bidirectional signal conditioning unit, a combiner/divider, a device to be tested and the like. By using the bidirectional signal conditioning unit and adding the signal receiving module in the space signal simulator, the test system can finish channel calibration, algorithm evaluation and performance test of the multi-channel array transceiving system without the help of far and near field conditions; the simulation of wide-bandwidth spatial domain space array signals can be realized by combining time delay with phase shift and matching a correlation configuration algorithm. The test system has the characteristics of low complexity, low cost and easy realization, thereby being particularly suitable for the test of the array transceiver system in the technical fields of communication, radar, electronic countermeasure and comprehensive radio frequency.
Description
Technical Field
The invention relates to the field of communication, radar, electronic countermeasure and comprehensive radio frequency technology equipment testing, in particular to an extensible broadband array signal simulation testing system.
Background
The array signal simulator is widely applied to research, test and evaluation of array systems such as sonar, communication, radar, navigation, electronic countermeasure and the like. The array signal simulator mainly comprises three types of digital, analog and hybrid, wherein the generation and processing of digital and hybrid signals are realized in a digital domain, so that the complex digital signal processing is difficult to avoid, a large amount of digital processing hardware and digital-analog and analog-digital conversion equipment are used, and even a multi-channel frequency converter is introduced to be suitable for the test and evaluation of a radio frequency, microwave and millimeter wave frequency band array transceiver system, so that the whole system is complex and high in manufacturing cost; the traditional pure analog array signal simulator is low in complexity and easy to realize, but the function is simple, the simulated airspace range, signal bandwidth and signal quantity are limited, the testing capability is limited by the number of physical channels, and the requirement of the current large-scale array transceiving system on testing the airspace large-view-field multi-signal scene cannot be met.
Disclosure of Invention
In order to solve the problems that the traditional array simulation equipment has single transceiving function, narrow instantaneous bandwidth and is limited by the number of physical channels, the invention uses a bidirectional signal conditioning unit and adds a signal receiving module in a space signal simulator, and the test system can finish channel calibration, algorithm evaluation and performance test of a multi-channel array transceiving system without the help of far and near field conditions; a time delay device and a phase shifter are adopted in the bidirectional conditioning unit, and the simulation of the broadband signal is realized by matching with a specific control algorithm; through the virtual subarray expansion technology, the test system can be free from the limitation of the number of tested physical channels, and the related test of a large array is completed. The test system has the characteristics of low complexity, low cost and easy realization, thereby being particularly suitable for the test of the array transceiving system in the technical fields of communication, radar, electronic countermeasure and comprehensive radio frequency.
In order to achieve the purpose, the invention adopts the technical scheme that:
an extensible broadband array signal simulation test system is characterized by comprising a control and signal generation storage processing device A, a virtual subarray B, a device to be tested C, a space signal simulator D, a signal generation device E, a signal receiving device F, a branching and branching device G, a bidirectional signal conditioning unit H and a branching and combining device I;
the control and signal generation and storage processing equipment A is used for realizing the control, data generation, reading and processing functions of each module in each virtual sub-array B and the equipment C to be tested;
the array scale test system has P virtual sub-arrays B which share one set of physical hardware, and the functions of the virtual sub-arrays are realized in a time-sharing manner through the control and configuration of control and data storage processing equipment A;
the equipment C to be tested has N receiving and transmitting channels in total, receives M space signals or transmits M wave beams, the received digital signals are sent to the control and data storage equipment A for processing, and the transmitted configuration and digital signals also come from the control and data processing equipment A;
each virtual subarray B physical hardware comprises M space signal simulators D and N combining and splitting devices I, wherein the M space signal simulators D can generate corresponding M space signals, the corresponding M space signals are superposed to N transmitting and receiving channels through the N combining and splitting devices according to a space propagation path and output to equipment C to be tested, and N signals of the equipment C to be tested can be received, split through the combining and splitting devices I and then combined into M signals through the space signal simulators D;
the space signal simulator D is used for generating and receiving array signals and comprises a signal generating unit E, a signal receiving unit F, a branching and branching device G and N bidirectional signal conditioning units H; n, M and P in the system are set values and are positive integers greater than 0;
for equipment C to be tested for realizing a receiving function, M spatial signal simulators D generate M independent single tone, multi-tone or modulation signals, signals generated by the mth spatial signal simulator D are branched by a branching and combining device G and then pass through N paths of bidirectional signal conditioning units H, the amplitude, phase and time delay of the signals are conditioned by the spatial signal simulators, the spatial signal direction is simulated by the bidirectional signal conditioning units, the number of channels is expanded by a virtual subarray B, and finally the M spatial signals are combined by N branching and combining devices I and enter the equipment C to be tested with N input channels, the equipment C to be tested is configured according to a state to be tested, and the output analog or digital signals are input to a control and signal generation and storage processing device A for storage and processing;
for a device C to be tested for realizing a transmitting function, an output N-channel analog signal is divided into M wave beams through N combining and splitting devices I, N-channel signals of an mth wave beam enter an mth space signal simulator, conditioning of signal amplitude, phase and time delay is realized through the space signal simulator through a bidirectional signal conditioning unit H, a receiving wave beam is synthesized through a configuration method in the bidirectional signal conditioning unit, channel quantity expansion is carried out through a virtual subarray B, wave beam synthesis is completed through a combining and splitting device G, and storage and processing are carried out on a control and signal generation storage and processing device A through a signal receiving F.
Furthermore, the space signal simulator D comprises a signal generation module E and a signal reception module F, the bidirectional signal conditioning unit H comprises a time delay unit H1, a numerical control attenuator H2, a bidirectional amplifier H3 and a phase shifter H4 which are sequentially connected in series, and the bidirectional space signal receiving and transmitting simulation can be realized by matching with the signal generation module E and the signal reception module F through the receiving and transmitting switching of the bidirectional amplifier H3.
Furthermore, the time delay device H1, the numerical control attenuator H2, the bidirectional amplifier H3 and the phase shifter H4 of the bidirectional signal conditioning unit H can be randomly exchanged in sequence.
Further, the bidirectional signal conditioning unit H comprises a time delay H1 and a phase shifter H4; the bidirectional signal conditioning unit realizes the simulation of the wide bandwidth airspace space array signal by the following modes:
the quantization delay of the delayer H1 in the bidirectional signal conditioning unit H is D step The quantized phase of the phase shifter H4 is P step The configuration algorithm introduces uniformly distributed virtual random time delay disturbance delta D to the nth bidirectional signal conditioning unit H of the mth spatial signal simulator D m,n And uniformly distributed pseudo-random phase perturbations Δ P m,n For an ideal center frequency phase gradient phi m,n (f, theta), wherein f is the central frequency of the working frequency band, theta is the space beam pointing angle, and the time delay setting D of the delayer H1 m,n And phase setting P m,n Calculated using the following formula respectively:
round {. Cndot } operator represents rounding.
Further, the expansion of the virtual sub-array B is realized through an array factor product theory; the method specifically comprises the following steps:
to complete the signal simulation of an N ' element array of M signals, where R is a 1 xL dimension post-beamforming vector, L is a sampling step, X is an N ' xL dimension received signal matrix, A is an N ' xM dimension space vector matrix, the number of M dimension spatial sources, S is an M X L dimension source matrix, N is a 0 Is N '× L dimension noise matrix, and w is N' × 1 dimension beam forming complex weight vector; therein (.) H Represents a conjugate transpose;
R＝w H X＝w H (AS+N 0 )
the array factor decomposition theory integral array directional diagram AF is adopted and can be decomposed into an array factor directional diagram AF tile Sum subarray pattern AF sub The product of (a); n' array units are decomposed into K virtual sub-arrays B in total, single signals or wave beams of each virtual sub-array B are realized by using a space signal simulator D comprising N bidirectional signal conditioning units H, and M independent signals or wave beams are realized by using M space signal simulators D; by using
Performing sub-array level beam forming, wherein
For a K x 1 complex weight vector, using w k Complete the sub-array beam forming, wherein w k Is a Kx 1 complex weight vector; the same source matrix S is adopted, and the virtual subarray B of the broadband array signal simulation test system is adopted each time
The expressed simulation test; and pass through
By using
And finishing the final beam synthesis.
Compared with other receiver designs, the invention has the following advantages:
1. the system has simple structure, low cost, convenient development of matched software, no limitation of physical arrangement, capability of completing the calibration and test of analog and digital multichannel transceiving arrays, and capability of being used for development and verification of related algorithms such as beam synthesis and the like;
2. the simulation of a bidirectional space broadband signal can be realized;
3. the method can be expanded to the test and evaluation of any multiple channels by a virtual subarray expansion technology without the limitation of the number of physical channels.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the scalable array signal simulation test system of the present invention.
Fig. 2 is a schematic diagram of a bidirectional signal conditioning unit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below by way of examples with reference to the accompanying drawings.
An extensible broadband array signal simulation test system comprises a control and signal generation and storage processing device A, a virtual sub-array B, a device C to be tested, a space signal simulator D, a signal generation E, a signal receiving F, a combiner-divider G, a bidirectional signal conditioning unit H and a combiner-divider I;
the method comprises the following steps that P virtual sub-arrays B are shared according to an array scale test system, share one set of physical hardware, and realize the function of the virtual sub-arrays in a time-sharing manner through the control and configuration of control and data storage processing equipment A;
the equipment C to be tested has N receiving and transmitting channels in total, receives M space signals or transmits M wave beams, the received digital signals are sent to the control and data storage equipment A for processing, and the transmitted configuration and digital signals also come from the control and data processing equipment A;
the virtual sub-array B physical hardware comprises M space signal simulators D, N combiners I and N combiners, can generate M space signals, is superposed to N channels through N combiners according to a space propagation path and is output to the equipment C to be tested, and can also receive N signals of the equipment C to be tested, are shunted through the combiners I and are synthesized into M signals through the space signal simulators D;
the space signal simulator D is used for generating and receiving array signals and comprises a signal generating unit E, a signal receiving unit F, a branching and branching device G and N bidirectional signal conditioning units H; n, M and P in the system are set values;
for equipment C to be tested for realizing a receiving function, M spatial signal simulators D generate M independent single-tone, multi-tone or modulation signals, the signals generated by the mth spatial signal simulator D are branched by a branching and branching device G and then pass through an N-path bidirectional signal conditioning unit H, the amplitude, the phase and the time delay of the signals are conditioned by the spatial signal simulators, the spatial signal direction is simulated by the bidirectional signal conditioning unit, the number of channels is expanded by a virtual submatrix B, and finally the M spatial signals are combined by N branching devices I and enter the equipment C to be tested with N input channels, the equipment C to be tested is configured according to a state to be tested, and the output analog or digital signals are input to a control and signal generation storage processing device A for storage and processing;
for a device C to be tested for realizing a transmitting function, an output N-channel analog signal is divided into M wave beams through N combining and splitting devices I, N-channel signals of an mth wave beam enter an mth space signal simulator, conditioning of signal amplitude, phase and time delay is realized through the space signal simulator through a bidirectional signal conditioning unit H, a receiving wave beam is synthesized through a configuration method in the bidirectional signal conditioning unit, channel quantity expansion is carried out through a virtual subarray B, wave beam synthesis is completed through a combining and splitting device G, and storage and processing are carried out on a control and signal generation storage and processing device A through a signal receiving F.
The space signal simulator D comprises a signal generating module E and a signal receiving module F, the bidirectional signal conditioning unit H comprises a time delayer H1, a numerical control attenuator H2, a bidirectional amplifier H3 and a phase shifter H4, and the receiving and transmitting of the bidirectional space signal simulator D can be simulated by matching the signal generating module E and the signal receiving module F through the receiving and transmitting switching of the bidirectional amplifier H3;
the bidirectional signal conditioning unit H comprises a time delayer H1 and a phase shifter H4; the bidirectional signal conditioning unit realizes the simulation of wide-bandwidth spatial domain spatial array signals in the following way:
the quantization delay of the delayer H1 in the bidirectional signal conditioning unit H is D step The quantized phase of the phase shifter H4 is P step The configuration algorithm introduces uniformly distributed virtual random time delay disturbance delta D to the nth bidirectional signal conditioning unit H of the mth space signal simulator D m,n And uniformly distributed pseudo-random phase perturbation Δ P m,n For an ideal center frequency phase gradient phi m,n (f, theta), wherein f is the central frequency of the working frequency band, theta is the space beam pointing angle, and the time delay setting D of the delayer H1 m,n And phase setting P m,n Calculated using the following formula respectively:
round {. Cndot } operator represents rounding.
And the expansion of the virtual sub-array B is realized through an array factor product theory.
To complete the signal simulation of an N ' element array of M signals, where R is a 1 xL-dimensional beamformed vector, L is a sampling step, X is an N ' xL-dimensional received signal matrix, A is an N ' xM-dimensional space vector matrix, the number of M-dimensional space sources, S is an M X L-dimensional source matrix, N is a sample step size, and 0 is N 'multiplied by L dimension noise matrix, and w is N' multiplied by 1 dimension beam forming complex weight vector; therein (.) H Represents a conjugate transpose;
R＝w H X＝w H (AS+N 0 )
the array factor decomposition theory integral array directional diagram AF is adopted and can be decomposed into an array factor directional diagram AF tile Sum subarray pattern AF sub The product of (a); decomposing N' array units into K virtual sub-arrays (B), wherein a single signal or wave beam of each virtual sub-array (B) is realized by using a space signal simulator (D) comprising N bidirectional signal conditioning units (H), and M independent signals or wave beams are realized by using M space signal simulators (D); by using
Performing sub-array level beam forming, wherein
For a K x 1 complex weight vector, take w k Complete the beam forming in the sub-array, wherein w k Is a Kx 1 complex weight vector; the same source matrix S is adopted, and the virtual subarrays (B) of the broadband array signal simulation test system are adopted each time to finish
The described simulation test; and pass through
By using
And finishing the final beam synthesis.
In a word, the invention realizes an extensible broadband array signal simulation test system, has the characteristics of low complexity, low cost and easy realization, and is particularly suitable for the test of the array transceiving system in the technical fields of communication, radar, electronic countermeasure and comprehensive radio frequency.
Claims (5)
1. An extensible broadband array signal simulation test system is characterized by comprising a control and signal generation storage processing device (A), a virtual subarray (B), a device to be tested (C), a space signal simulator (D), a signal generation device (E), a signal receiving device (F), a branching and branching device (G), a bidirectional signal conditioning unit (H) and a branching and branching device (I);
the control and signal generation and storage processing equipment (A) is used for realizing the control, data generation, reading and processing functions of each module in each virtual sub-array (B) and the equipment (C) to be tested;
the array scale test system has P virtual sub-arrays (B) which share one set of physical hardware, and the functions of the virtual sub-arrays are realized in a time-sharing manner through the control and configuration of control and data storage processing equipment (A);
the equipment to be tested (C) is provided with N transceiving channels in total, receives M space signals or transmits M wave beams, the received digital signals are sent to the control and data storage equipment (A) for processing, and the transmitted configuration and digital signals are also from the control and data processing equipment (A);
each virtual sub-array (B) physical hardware comprises M space signal simulators (D) and N combiners (I), wherein the M space signal simulators (D) can generate corresponding M space signals, the corresponding M space signals are superposed to N transmitting and receiving channels through the N combiners according to a space propagation path and output to equipment to be tested (C), and the N signals of the equipment to be tested (C) can be received, split through the combiners (I) and then synthesized into M signals through the space signal simulators (D);
the space signal simulator (D) is used for generating and receiving array signals and comprises a signal generator (E), a signal receiver (F), a combiner (G) and N bidirectional signal conditioning units (H); n, M and P in the system are set values and are positive integers larger than 0;
for equipment to be tested (C) for realizing a receiving function, M space signal simulators (D) generate M independent single tones, multiple tones or modulation signals, the signals generated by the mth space signal simulator (D) are split by a splitter (G) and then pass through N paths of bidirectional signal conditioning units (H), the amplitude, the phase and the time delay of the signals are conditioned by the space signal simulators, the space signal direction is simulated by the bidirectional signal conditioning units, the channel number is expanded by a virtual subarray (B), and finally the M space signals are combined by N paths of combiner-splitters (I) and enter the equipment to be tested (C) with N input channels, the equipment to be tested (C) is configured according to a state to be tested, and the output analog or digital signals are input to a control and signal generation storage processing device (A) for storage and processing;
for equipment to be tested (C) for realizing a transmitting function, an output N-channel analog signal is divided into M wave beams through N combining and splitting devices (I), an N-channel signal of an mth wave beam enters an mth space signal simulator, conditioning of signal amplitude, phase and time delay is realized through the space signal simulator through a bidirectional signal conditioning unit (H), a receiving wave beam is synthesized through a configuration method in the bidirectional signal conditioning unit, channel number expansion is carried out through a virtual subarray (B), wave beam synthesis is completed through the combining and splitting devices (G), and storage and processing are carried out on the control and signal generation storage and processing equipment (A) through signal receiving (F).
2. The scalable broadband array signal simulation test system according to claim 1, wherein the spatial signal simulator (D) comprises a signal generator (E) and a signal receiver (F), the bidirectional signal conditioning unit (H) comprises a delayer (H1), a digitally controlled attenuator (H2), a bidirectional amplifier (H3) and a phase shifter (H4) which are connected in series in sequence, and the bidirectional spatial signal simulation of transmission and reception can be realized by switching transmission and reception of the bidirectional amplifier H3 in cooperation with the signal generator E and the signal receiver F.
3. The scalable broadband array signal simulation test system according to claim 2, wherein the time delay (H1) of the bidirectional signal conditioning unit (H), the digitally controlled attenuator (H2), the bidirectional amplifier (H3) and the phase shifter (H4) are sequentially switched at will.
4. A scalable broadband array signal simulation test system according to claim 2, wherein the bidirectional signal conditioning unit (H) comprises a delay (H1) and a phase shifter (H4); the bidirectional signal conditioning unit realizes the simulation of wide-bandwidth spatial domain spatial array signals in the following way:
the quantization delay of the delay unit (H1) in the bidirectional signal conditioning unit (H) is D step The quantized phase of the phase shifter (H4) is P step The configuration algorithm introduces the uniform division compliance to the nth bidirectional signal conditioning unit (H) of the mth spatial signal simulator (D)Pseudo-random time delay disturbance delta D of cloth m,n And uniformly distributed pseudo-random phase perturbation Δ P m,n For an ideal center frequency phase gradient phi m,n (f, theta), wherein f is the central frequency of the working frequency band, theta is the space beam pointing angle, and the time delay setting D of the delayer H1 m,n And phase setting P m,n Calculated using the following formulas, respectively:
round {. Cndot } operator represents rounding.
5. The scalable broadband array signal simulation test system according to claim 4, wherein the virtual sub-array (B) is expanded by an array factor product theory; the method comprises the following specific steps:
to complete the signal simulation of an N ' element array of M signals, where R is a 1 xL-dimensional beamformed vector, L is a sampling step, X is an N ' xL-dimensional received signal matrix, A is an N ' xM-dimensional space vector matrix, the number of M-dimensional space sources, S is an M X L-dimensional source matrix, N is a sample step size, and 0 is N 'multiplied by L dimension noise matrix, and w is N' multiplied by 1 dimension beam forming complex weight vector; therein (·) H Represents a conjugate transpose;
R＝w H X＝w H (AS+N 0 )
the array factor decomposition theory integral array directional diagram AF is adopted and can be decomposed into an array factor directional diagram AF tile Sum subarray pattern AF sub The product of (a); decomposing N' array units into K virtual sub-arrays (B), wherein a single signal or wave beam of each virtual sub-array (B) is realized by using a space signal simulator (D) comprising N bidirectional signal conditioning units (H), and M independent signals or wave beams are realized by using M space signal simulators (D); by using
Performing subarray level beam synthesis, wherein
For a K x 1 complex weight vector, using w k Complete the beam forming in the sub-array, wherein w k Is a Kx 1 complex weight vector; the same source matrix S is adopted, and the virtual subarrays (B) of the broadband array signal simulation test system are adopted each time
The expressed simulation test; and pass through
By using
The final beam synthesis is completed.
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