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Wide-main-lobe phase coding signal and mismatch filter combined optimization method

A phase-encoded signal and mismatch filter technology, applied in the field of radar, can solve the problems of reducing range side lobes and not proposing a phase-encoded signal mismatch filter design method, etc.

Active Publication Date: 2015-11-11
XIDIAN UNIV
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Problems solved by technology

However, for a wideband radar system, the signal processing bandwidth is fixed. At this time, it is impossible to reduce the range sidelobe by simply increasing the symbol length. At present, there is no design method for the mismatch filter based on the phase-encoded signal to solve this problem.

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Embodiment Construction

[0039] refer to figure 1 , a joint optimization method of a wide main lobe phase-encoded signal and a mismatch filter provided by an embodiment of the present invention includes the following steps:

[0040] Step 1, determine the symbol length N of the phase encoded signal s s and the main lobe width control amount M of the phase encoded signal s.

[0041] Step 1 specifically includes the following sub-steps:

[0042] (1a) Set the first phase encoding signal s 1 The symbol length N 1 ;

[0043] (1b) According to the first phase encoding s 1 The symbol length N 1 , to determine the symbol length N of the phase-encoded signal s s .

[0044] Among them, N s =b×N 1 , b is the increase multiple of the symbol length of the phase-encoded signal s, and the value of b is an integer, and N h -N s is an even number, N h +N s Also an even number.

[0045] (1c) Set the main lobe width control amount M=fix(δ×b) of the phase encoded signal s.

[0046] Among them, δ is an empi...

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Abstract

The invention belongs to the field of a radar technology, and discloses a wide-main-lobe phase coding signal and mismatch filter combined optimization method. The method comprises the following steps: determining a code element length Ns of a phase coding signal s and a main lobe width control amount M of the phase coding signal; setting a length Nh of a mismatch filter h, and according to the code element length Ns of the phase coding signal s, the main lobe width control amount M of the phase coding signal and the length Nh of the mismatch filter h, constructing a target function about the phase coding signal s and the mismatch filter h; and based on a minimum p norm optimization algorithm, solving the target function of the phase coding signal s and the mismatch filter h, and obtaining the mismatch filter h and an optimized phase coding signal s'. The method can reduce the distance sidelobe level of the phase coding signal after pulse compression.

Description

technical field [0001] The invention belongs to the technical field of radar, and specifically relates to a joint optimization method of a wide main lobe phase encoding signal and a mismatch filter, which is used to reduce the range sidelobe after pulse compression of the wide main lobe phase encoding signal and a mismatch filter level. Background technique [0002] The pulse compression technology solves the contradiction between the radar's operating range and range resolution, and has been widely used in the radar field. However, the pulse compression signal usually has a high range side lobe, and the high range side lobe is not conducive to the effective detection of the target by the radar, especially the weak target detection in the background of multiple targets or strong clutter, the main lobe of the weak target It is very easy to be overwhelmed by the range sidelobe of the strong target echo, resulting in missed alarms, which affects the detection performance of th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28
CPCG01S7/2813
Inventor 周生华刘宏伟徐磊磊臧会凯张可
Owner XIDIAN UNIV
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