Signal waveform design method for low probability of intercept radar communication integrated system
A technology of signal waveform and design method, applied in the field of radar communication, can solve the problems of low interception performance of radar communication integrated signal, side lobe interference without considering signal range resolution, and poor detection performance of radar communication integrated signal, etc. Enhance the complexity of phase agility and modulation methods, overcome the effects of poor low intercept performance and poor detection performance
Active Publication Date: 2018-11-06
XIDIAN UNIV
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However, the disadvantage of this method is that the linear frequency modulation signal used by the system to complete the transmission of radar and communication data does not consider the influence of sidelobe interference in the signal distance resolution and velocity resolution of a single linear frequency modulation method. The detection performance of integrated com
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[0028] The present invention will be further described below in conjunction with the accompanying drawings.
[0029] Step 1, obtain the information chip sequence.
[0030] Using the spread spectrum sequence of length P to perform direct sequence spread spectrum on the information symbol sequence of length N to be transmitted to obtain an information chip sequence of length L, where L=N×P.
[0031] The spread spectrum sequence refers to a pseudo-random sequence with a symbol of 1 or -1.
[0032] The communication sequence to be sent refers to a sequence composed of N information symbols of M-order quadrature amplitude modulation, and each information symbol has M values.
[0033] The direct sequence spread refers to multiplying each information symbol with a spread sequence to obtain N information chip sequences with a length of P.
[0034] Step 2, establishing a mapping relationship between information chips and signal phases.
[0035] The elements in the value space of the...
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The invention discloses a signal waveform design method for a low probability of intercept radar communication integrated system, which overcomes the problems of poor distance resolution, speed resolution and low probability of intercept performance of a radar communication integrated signal. The method comprises the following implementation steps of (1) acquiring an information chip sequence; (2)establishing a mapping relation between an information chip and ae signal phase; (3) obtaining a phase-coded pulse signal; (4) obtaining a linear frequency-modulated baseband signal; and (5) obtaining a transmitting signal of the low probability of intercept radar communication integrated system. According to the method, the fluctuation of a signal fuzzy function near an original point is inhibited, the distance resolution and the speed resolution of a detection target of the system are improved, the phase agility of the transmitting signal of the radar communication integrated system and thecomplexity of a modulation mode are enhanced, the low probability of intercept performance of the radar communication integrated system is improved, and the method meets the precision requirement ofthe detection target of the radar communication integrated system in a complex electromagnetic environment and the requirement for the low probability of intercept performance of the radar communication integrated system.
Description
technical field [0001] The invention belongs to the technical field of radar communication, and further relates to a signal waveform design method of a low-interception radar communication integrated system in the technical field of electronic countermeasures. The invention can be applied to a radar communication integrated system combining radar detection and information transmission functions, designs the transmission signal waveform of the radar communication integrated system, and improves the low intercept performance of the radar communication integrated system. Background technique [0002] With the development of electronic countermeasures technology, the integrated radar communication system is facing more and more threats, and the design requirements of the integrated radar communication waveform are getting higher and higher. In an increasingly complex electromagnetic environment, only when the integrated radar communication system completes the target detection a...
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Login to view more IPC IPC(8): H04B1/707H04B1/7075G01S7/282
CPCG01S7/282H04B1/707H04B1/70712H04B1/7075
Inventor 吴莉莉马晨曦
Owner XIDIAN UNIV
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