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Waveform design method of expanding zero-correlation zone

A waveform design and zero-correlation technology, applied in the field of zero-correlation area expansion, can solve the problems of increased length and reduced efficiency of zero-correlation area growth, and achieve the effect of reducing mutual influence, large zero-correlation area, and perfect cross-correlation characteristics

Inactive Publication Date: 2017-05-31
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

For zero-correlation bi-phase codes, in order to obtain a longer zero-correlation region, the value of m or n needs to be increased, but at the same time the length of the code will also increase, and the efficiency of the growth of the zero-correlation region will decrease

Method used

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  • Waveform design method of expanding zero-correlation zone
  • Waveform design method of expanding zero-correlation zone
  • Waveform design method of expanding zero-correlation zone

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0015] The present invention includes:

[0016] 1. Generation of zero-correlation sequence group, used to generate zero-correlation binary code sequence group:

[0017]

[0018] And send the generated zero-correlation binary code sequence group S to the Kronecker multiplier. The zero-correlation sequence group has a total of M sequences, and the length of each sequence is L 1 = 2 2n+m+1 , changing the value of m or n can change the sequence length. L 1 The choice of needs to comprehensively consider the computational complexity and the length of the zero-correlation region of the correlation sequence to determine, s i (j),i=1,2,...,M,j=1,2,...,L 1 Denotes the i-th zero-correlation sequence S i The jth element of .

[0019] 2. Spread spectrum radar polyphase code ...

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Abstract

The invention provides a waveform design method of an expanding zero-correlation zone; the method includes steps of forming a zero-correlation sequence by applying an initial regular base sequence generating method, introducing a spread spectrum radar polyphase code sequence to perform Kronecher multiplication with the zero-correlation sequence, so that the final sequence has quasi-perfect self-correlation property and perfect cross-correlation property within a certain zone, and has a larger zero correlation zone; thereby effectively reducing the mutual influence of the echo of adjacent distance units and improving the target detecting precision.

Description

technical field [0001] The invention belongs to the field of MIMO radar waveform design, and more specifically relates to a zero-correlation region expansion method. Background technique [0002] In the range high-resolution MIMO radar for air targets, the target echo may only span several or even dozens of range cells, and there is no echo signal in the range cells far away from the signal autocorrelation main lobe. In order to reduce the mutual influence of adjacent distance unit echoes, it is required that the transmitted signal has lower autocorrelation sidelobe and cross-correlation within several distance units near the autocorrelation main lobe (called zero correlation region), while for the far away from the main lobe region Side lobe peaks can be unlimited. [0003] Zero-correlation polyphase codes have been widely used in communication. The values ​​of the periodic autocorrelation and cross-correlation of the zero-correlation polyphase code are zero within a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 刘志国宋晓风
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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