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A Joint Optimization Method for Phase-Encoded Signals and Mismatched Filters Based on p-norm

A technology of phase encoding signal and mismatch filter, which is applied in the field of radar to achieve the effect of reducing the peak sidelobe level

Active Publication Date: 2017-09-01
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the initial signal of the phase-encoded signal is a phase-encoded signal with low range sidelobe levels, the existing methods may exclude some possible better optimization results

Method used

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  • A Joint Optimization Method for Phase-Encoded Signals and Mismatched Filters Based on p-norm
  • A Joint Optimization Method for Phase-Encoded Signals and Mismatched Filters Based on p-norm
  • A Joint Optimization Method for Phase-Encoded Signals and Mismatched Filters Based on p-norm

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Embodiment Construction

[0039] Such as figure 1 As shown, the joint optimization method of the p-norm-based phase encoding signal and the mismatch filter provided by the embodiment of the present invention includes the following steps:

[0040] Step 1, set the symbol length N of the phase encoded signal s s and the length N of the mismatch filter h h , and the maximum SNR loss SNR loss .

[0041] Among them, N h ≥N s , and N h +Ns is an even number. Usually, the signal-to-noise ratio loss SNR is required loss ≤1dB.

[0042] Step 2, determine the mismatch filter output result of the phase-encoded signal s passing through the mismatch filter h And the peak sidelobe level of the mismatch filter output result ρ of the phase-encoded signal s through the mismatch filter h

[0043] in, Indicates convolution, [.] T Represents the transpose, i∈[1,2,...,N s +N h -1].

[0044] Assuming that the phase-encoded signal is s, the mismatch filter is h, and the phase-encoded signal s passes through ...

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Abstract

The invention belongs to the technical field of radar, and discloses a combined optimization method for phase-coded signals and a mismatched filter based on a p-norm. The combined optimization method comprises the following steps: setting code element length of a phase-coded signal and length of a mismatched filter, and maximum signal to noise ratio loss; determining a mismatched filter output result of the phase-coded signal which passes through the mismatched filter, and peak-sidelobe level of the mismatched filter output result of the phase-coded signal which passes through the mismatched filter; establishing an optimization standard of the phase-coded signal and the mismatched filter; performing formal transformation on the optimization standard; solving to obtain phase of the phase-coded signal, phase of the mismatched filter, and amplitude of the mismatched filter; and establishing the phase-coded signal and the mismatched filter. The method can reduce distance sidelobe level of a radar reception channel.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a joint optimization method of a p-norm-based phase encoding signal and a mismatch filter, which is used for reducing the distance side lobe level of a radar receiving channel. Background technique [0002] The pulse compression technology solves the contradiction between the radar's operating range and range resolution, but the pulse compression signal usually has a high range side lobe, and the high range side lobe is not conducive to the radar's effective detection of the target, especially in the Weak target detection under multi-target or strong clutter background, the main lobe of the weak target is easily overwhelmed by the range side lobe of the strong target echo, resulting in missed alarms. Therefore, it is of great significance to design signal waveforms with good range sidelobe characteristics to improve the detection performance of radar. [0003] Judging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/28
CPCG01S7/2813
Inventor 刘宏伟周生华徐磊磊曹鼎臧会凯
Owner XIDIAN UNIV