CN109828247A - Encode phase-modulated pulse Doppler Fuze short distance target signal imitation method and device - Google Patents
Encode phase-modulated pulse Doppler Fuze short distance target signal imitation method and device Download PDFInfo
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Abstract
The present invention provides a kind of coding phase-modulated pulse Doppler Fuze short distance target signal imitation method and devices, its method includes: the transmitting signal and encoded signal for receiving coding phase-modulated pulse Doppler Fuze, and transmitting signal is distributed in two signal paths and is handled；In first signal path: carrying out detection to transmitting signal and obtain the pulse period, and calculate separately out across Periodic Compensation time and phase code thermal compensation signal；In second signal path: carrying out frequency modulation(PFM) to transmitting signal and delay process is obtained across periodic signal, and to across periodic signal carry out phase bit flipping, obtain phase compensation signal；Power control is carried out to phase compensation signal, obtains required short distance target analog signal, and is recycled in coding phase-modulated pulse Doppler Fuze, short distance target simulation is completed.The present invention is capable of the short distance target signal of analog encoding phase-modulated pulse Doppler Fuze, realizes the complete detection to its target acquisition performance.
Description
Technical Field
The invention relates to the technical field of fuse target simulation, in particular to a method and a device for simulating target signals in a near zone of a code phase modulation pulse Doppler fuse.
Background
At present, the performance of the fuze directly influences the damage effect of a weapon system on a target, and in the development and production processes of the fuze, a target signal simulation device is usually needed to simulate target signals in different meeting processes so as to check the target detection capability of the fuze. The fuze target signal simulation device is similar to a radar signal simulation device, is a product of combining a target simulation technology and a radar technology, and realizes various functions by simulating a target echo signal. Foreign research into this field has been reported in large numbers, and domestic efforts have been made in the related fields over the past 10 years. However, the conventional fuze target signal simulation device cannot simulate a near-zone target signal due to the limitation of the working system and the signal processing speed. With the wide application of the code phase modulation pulse Doppler system in the fuse field, the near zone performance is continuously improved, and the contradiction is increasingly prominent.
Disclosure of Invention
In view of this, the invention provides a method and a device for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse, and aims to solve the problem that the conventional fuse target signal simulation device cannot simulate a near zone signal.
On one hand, the invention provides a code phase modulation pulse Doppler fuse near-zone target signal simulation method, which comprises the following steps:
receiving a transmitting signal and a coding signal of a code phase modulation pulse Doppler fuse, and distributing the transmitting signal to two signal channels for preset processing;
in a first signal path: detecting the transmitting signal to obtain a pulse period, and respectively calculating the cross-period compensation time and the phase coding compensation signal according to the pulse period;
in the second signal path: sequentially performing Doppler frequency modulation and delay processing on the transmitting signal to obtain a cross-periodic signal, and performing phase reversal on the cross-periodic signal according to the phase coding compensation signal obtained in the first channel to obtain a phase compensation signal;
and carrying out power control corresponding to the template signal characteristic to be simulated on the phase compensation signal to obtain a required near zone target simulation signal, and returning the near zone target simulation signal to the code phase modulation pulse Doppler fuse to finish near zone target simulation.
Further, in the above method for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse, the span period compensation time is obtained by subtracting a system fixed delay from the pulse period.
Further, in the method for simulating the target signal in the near area of the code phase modulation pulse doppler fuse, the phase code compensation signal is obtained by performing exclusive or on the code signal of the current period and the code signal of the next period according to the pulse period.
Further, in the above method for simulating a target signal in a near area of a code phase modulation pulse doppler fuse, when the doppler frequency modulation processing is performed on the transmission signal, the doppler frequency modulation processing is performed according to the characteristics of the target signal to be simulated.
Further, in the method for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse, the delay processing includes: distance delay processing and cross-cycle delay processing.
Further, in the above method for simulating a target signal in a near area of a code phase modulation pulse doppler fuse, the distance delay processing process needs to process the transmitted signal according to the characteristics of the target signal to be simulated.
Further, in the code phase modulation pulse doppler fuse near zone target signal simulation method, in the cycle-crossing delay processing process, a signal of a current pulse cycle needs to be delayed to a preset position of a next pulse cycle according to the cycle-crossing compensation time.
On the other hand, the invention also provides a device for simulating a target signal in a near zone of a code phase modulation pulse Doppler fuse, which comprises the following components: the device comprises a receiving unit, a synchronizing unit, a modulating unit, a time delay unit, a phase control unit and a power control unit; wherein,
the receiving unit is used for receiving a transmitting signal of the code phase modulation pulse Doppler fuse and distributing the transmitting signal to two signal channels;
the synchronous unit is connected with the receiving unit and used for receiving a coding signal given by a code phase modulation pulse Doppler fuse, detecting one path of the transmitting signal output by the receiving unit to obtain a pulse period, and respectively calculating the cross-period compensation time and the phase code compensation signal according to the pulse period;
the modulation unit is connected with the receiving unit and is used for performing Doppler frequency modulation processing on the other path of the transmitting signal output by the receiving unit according to the characteristic of a target signal to be simulated and outputting the Doppler frequency modulation processing to the delay unit;
the delay unit is connected with the modulation unit, and is used for performing distance delay and cross-cycle delay processing on the signal output by the modulation unit and outputting the signal to the phase control unit;
the phase control unit is connected with the delay unit and used for performing phase reversal on the signal output by the delay unit according to the phase coding compensation signal and outputting the signal to the power control unit;
and the power control unit and the phase control unit are used for performing power control corresponding to the template signal characteristics to be simulated on the signal output by the phase control unit and outputting the signal to a code phase modulation pulse Doppler fuse to complete the near zone target simulation.
Further, in the above code phase modulation pulse doppler fuse near zone target signal simulation apparatus, in the synchronization unit, the period-crossing compensation time is obtained by subtracting a system fixed delay from the pulse period.
Further, in the above code phase modulation pulse doppler fuse near zone target signal simulation apparatus, in the synchronization unit, the phase code compensation signal is obtained by xoring the code signal of the current period and the code signal of the next period according to the pulse period.
Compared with the prior art, the method and the device for simulating the target signal in the near zone of the code phase modulation pulse Doppler fuse have the advantages that the near zone target signal of the code phase modulation pulse Doppler fuse can be simulated, and the target detection performance can be comprehensively detected.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a method for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse according to an embodiment of the present invention;
fig. 2 is a block diagram of a device for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a method for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse according to an embodiment of the present invention includes the following steps:
receiving a transmitting signal and a coding signal of a code phase modulation pulse Doppler fuse, and distributing the transmitting signal to two signal channels for preset processing;
in a first signal path: and detecting the transmitted signal to obtain a pulse period, and respectively calculating the cross-period compensation time and the phase coding compensation signal according to the pulse period. Wherein the period-crossing compensation time is obtained by subtracting a system fixed delay from the pulse period; the phase coding compensation signal is obtained by performing exclusive or on the coding signal of the current period and the coding signal of the next period according to the pulse period.
In the second signal path: firstly, performing Doppler frequency modulation and distance delay processing corresponding to the characteristics of a target signal to be simulated on the transmitting signal; then, according to the cross-cycle compensation time obtained in the first signal channel, performing cross-cycle delay processing on the signal subjected to Doppler frequency modulation and distance delay processing, namely delaying the signal of the current pulse cycle to a preset position of the next pulse cycle to obtain a cross-cycle signal; and finally, carrying out phase inversion on the cycle-crossing signal according to the phase coding compensation signal obtained in the first channel to obtain a phase compensation signal.
And carrying out corresponding power control on the phase compensation signal according to the characteristic of the template signal to be simulated to obtain a required near zone target simulation signal, and returning the near zone target simulation signal to the code phase modulation pulse Doppler fuse to finish near zone target simulation.
Referring to fig. 2, a device for simulating a target signal in a near zone of a code phase modulation pulse doppler fuse according to an embodiment of the present invention includes: a receiving unit 201, a synchronizing unit 202, a modulating unit 203, a delaying unit 204, a phase control unit 205, and a power control unit 206; wherein,
the receiving unit 201 is configured to receive a transmission signal of a code phase modulation pulse doppler fuse, and distribute the received transmission signal to two signal channels, where one of the two signal channels is output to the synchronizing unit 202, and the other signal channel is output to the modulating unit 203, so that the synchronizing unit 202 and the modulating unit 203 perform different processing on the transmission signal synchronously.
The synchronization unit 202 is connected to the receiving unit 201, and is configured to receive a code signal from a code phase modulation pulse doppler fuse. On the other hand, the delay unit 204 is configured to detect a path of received transmission signal output by the receiving unit 201 to obtain a pulse period of the transmission signal, obtain a cross-period compensation time by subtracting a system fixed delay from the obtained pulse period, and output a result of the cross-period compensation time to the delay unit 204, so that the delay unit 204 performs delay processing on the cross-period compensation time; meanwhile, according to the obtained pulse period, the code signal of the current period and the code signal of the next period are subjected to exclusive or to obtain a phase code compensation signal, and the result is output to the delay unit 204 and the phase control unit 205, so that the signals are subjected to subsequent processing.
The modulation unit 203 is connected to the receiving unit 201, and when receiving another path of transmission signal output by the receiving unit 201, automatically performs corresponding doppler frequency modulation processing on the received transmission signal according to the characteristics of a target signal to be simulated, and outputs the processed transmission signal to the delay unit 204, so that the delay unit 204 performs delay processing on the transmission signal.
The delay unit 204 is connected to the synchronization unit 202 and the modulation unit 203, respectively, and after receiving the transmission signal input by the modulation unit 203, performs corresponding distance delay processing on the transmission signal according to the characteristic of a target signal to be simulated, and further performs delay processing, that is, cross-cycle delay processing on the transmission signal according to the cross-cycle compensation time input by the synchronization unit 202, so as to obtain a cross-cycle signal, and outputs the cross-cycle signal to the phase control unit 205, so that the phase control unit 205 performs phase processing on the cross-cycle signal.
The phase control unit 205 is connected to the synchronization unit 202 and the delay unit 204, respectively, and when receiving the cycle-crossing signal input by the delay unit 204, the phase control unit inverts the phase of the cycle-crossing signal according to the received phase coding compensation signal input by the synchronization unit 202, and outputs the inverted signal to the power control unit 206.
The power control unit 206 is connected to the phase control unit 205, and after receiving the signal input by the phase control unit 205, performs corresponding power control on the signal according to the characteristic of the template signal to be simulated, and outputs the signal to the code phase modulation pulse doppler fuze, thereby completing near-zone target simulation.
It is clear that the above-described embodiment of the invention has the following advantages: the near-zone target signal of the code phase modulation pulse Doppler fuse can be simulated, and the comprehensive detection of the target detection performance is realized.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A code phase modulation pulse Doppler fuse near-zone target signal simulation method is characterized by comprising the following steps:
receiving a transmitting signal and a coding signal of a code phase modulation pulse Doppler fuse, and distributing the transmitting signal to two signal channels for preset processing;
in a first signal path: detecting the transmitting signal to obtain a pulse period, and respectively calculating the cross-period compensation time and the phase coding compensation signal according to the pulse period;
in the second signal path: sequentially performing Doppler frequency modulation and delay processing on the transmitting signal to obtain a cross-periodic signal, and performing phase reversal on the cross-periodic signal according to the phase coding compensation signal obtained in the first channel to obtain a phase compensation signal;
and carrying out power control corresponding to the template signal characteristic to be simulated on the phase compensation signal to obtain a required near zone target simulation signal, and returning the near zone target simulation signal to the code phase modulation pulse Doppler fuse to finish near zone target simulation.
2. The method of claim 1, wherein the span compensation time is obtained by subtracting a system fixed delay from the pulse period.
3. The method of claim 1, wherein the phase-code compensation signal is obtained by xoring a code signal of a current period with a code signal of a next period according to the pulse period.
4. The method as claimed in claim 1, wherein the Doppler frequency modulation is performed on the transmitted signal according to the characteristics of the target signal to be simulated.
5. The method of claim 1, wherein the delay processing comprises: distance delay processing and cross-cycle delay processing.
6. The method of claim 5, wherein the distance delay processing is performed on the transmitted signal according to the characteristics of the target signal to be simulated.
7. The method of claim 5, wherein the signal of the current pulse period is delayed to a preset position of the next pulse period according to the cross-period compensation time in the cross-period delay processing.
8. A code phase modulation pulse doppler fuse near zone target signal simulation apparatus, comprising: the device comprises a receiving unit, a synchronizing unit, a modulating unit, a time delay unit, a phase control unit and a power control unit; wherein,
the receiving unit is used for receiving a transmitting signal of the code phase modulation pulse Doppler fuse and distributing the transmitting signal to two signal channels;
the synchronous unit is connected with the receiving unit and used for receiving a code signal given by a code phase modulation pulse Doppler fuse, detecting one path of the transmitting signal output by the receiving unit to obtain a pulse period, and respectively calculating the cross-period compensation time and the phase code compensation signal according to the pulse period;
the modulation unit is connected with the receiving unit and used for performing Doppler frequency modulation processing on the other path of the transmitting signal output by the receiving unit according to the characteristic of a target signal to be simulated and outputting the Doppler frequency modulation processing to the delay unit;
the delay unit is respectively connected with the synchronization unit and the modulation unit, and is used for performing distance delay processing on the signal output by the modulation unit, performing cross-cycle delay processing on the signal according to the received cross-cycle compensation time input by the synchronization unit to obtain a cross-cycle signal, and outputting the cross-cycle signal to the phase control unit;
the phase control unit is respectively connected with the synchronization unit and the delay unit, and is used for performing phase inversion on the cross-period signal according to the phase coding compensation signal and outputting the cross-period signal to the power control unit;
and the power control unit and the phase control unit are used for performing power control corresponding to the template signal characteristics required to be simulated on the signal output by the phase control unit and outputting the signal to the code phase modulation pulse Doppler fuse so as to finish the near zone target simulation.
9. The code phase modulation pulse doppler fuse near zone target signal simulation device of claim 8, wherein in the synchronization unit, the span compensation time is obtained by subtracting a system fixed delay from the pulse period.
10. The apparatus of claim 8, wherein the synchronization unit is configured to obtain the phase-code compensation signal by xoring the code signal of the current period with the code signal of the next period according to the pulse period.
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| CN111289952A (en) * | 2020-03-27 | 2020-06-16 | 华清瑞达（天津）科技有限公司 | Radar target echo simulation method and device |
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