Multi-carrier frequency multi-phase coding detection interference shared signal generating method
A technology for sharing signals and phase encoding, applied to radio wave measurement systems, instruments, etc., can solve the problems of lack of practical significance and low signal complexity, and achieve the effect of breaking through limitations, increasing complexity, and suppressing interference performance
Pending Publication Date: 2021-12-28
HARBIN ENG UNIV
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Problems solved by technology
However, phase encoding mostly adopts two-phase encoding, which makes the signal complexity lower
At the same time, most of the shared signals in the literature are based on the interference performance of radar signals, which lack practical significance
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Embodiment 1
[0050] In the simulation process, it is assumed that the opponent's radar signal is a down-converted chirp signal. The bandwidth of the chirp signal is 40MHz, the duration of the signal is 10μs, and the sampling frequency is 100MHz.
[0051] Establish a mathematical model for detecting interference sharing signals:
[0052] The multi-carrier phase code radar signal (Multi-carrier Phase Code, MCPC) is based on the multi-carrier frequency orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) signal, which introduces phase coding.
[0053] The complex envelope form of MCPC signal based on multi-carrier frequency polyphase coding can be expressed as:
[0054]
[0055] Wherein, N is the number of carrier frequencies of the signal. In theory, the more the number of carrier frequencies, the higher the complexity of the signal. In this embodiment, 20 are used, which can be changed according to the actual situation. K is the length of the pha...
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The invention belongs to the technical field of interference shared signals, and particularly relates to a multi-carrier frequency multi-phase coding detection interference shared signal generating method. Multi-phase coding is introduced on the basis of a multi-carrier frequency orthogonal frequency division multiplexing signal, and phase coding is performed by utilizing Logistic chaotic mapping, so that a multi-carrier frequency multi-phase coded signal is obtained. In this way, the excellent characteristics of large bandwidth and the like of orthogonal frequency division multiplexing signal synthesis are reserved, and meanwhile, the quasi-randomness of chaotic coding is introduced into the signals, so that the complexity of the signals is improved, and the signals are difficult to intercept while suppressing interference is implemented. Experimental simulation and analysis prove that the method has good interference suppression performance and good detection performance, the complexity and the concealment of detection interference sharing signals are improved, and the limitation of the performance of existing detection interference sharing signals is broken through.
Description
technical field [0001] The invention belongs to the technical field of interference sharing signals, and in particular relates to a generation method of multi-carrier frequency and multi-phase coding detection interference sharing signals. Background technique [0002] With the continuous improvement of informatization and intelligence, traditional electronic systems with single functions are difficult to meet the needs. At present, the shared signal that integrates detection and interference has attracted more and more attention. From the point of view of traditional jamming signals, the detection and interference sharing signal has both detection performance, so that the covert detection of the target can be completed while jamming is being carried out. [0003] Radar detection and radar jamming are complementary to each other. For the shared signal of detection and suppression of jamming, the signal must have the detection capability while having noise-like spectrum perf...
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IPC IPC(8): G01S7/38G01S7/28
CPCG01S7/38G01S7/28
Inventor 肖易寒刘禹汐胡学晶陈涛
Owner HARBIN ENG UNIV