Multi-criterion radar emission signal design method based on phase modulation

A technology for transmitting signals and radars, applied in the radar field, can solve the problems affecting the overall system performance and errors of the radar, and achieve the effect of improving the overall working performance, meeting the working requirements, and increasing mutual information.

Inactive Publication Date: 2013-08-28
XIDIAN UNIV
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Problems solved by technology

However, this method ignores the influence of clutter, and the environment model established is too ideal and simple. In the actual environment, it will have a great impact

Method used

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  • Multi-criterion radar emission signal design method based on phase modulation
  • Multi-criterion radar emission signal design method based on phase modulation
  • Multi-criterion radar emission signal design method based on phase modulation

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Embodiment Construction

[0027] refer to figure 1 , the implementation steps of the present invention are as follows:

[0028] Step 1, the frequency domain sampling is performed on the power spectrum of the radar target, clutter and noise respectively.

[0029] In this example, assuming that the power spectra of the radar target, clutter and noise are known, the frequency domain sampling is performed at the frequency domain sampling frequency f to obtain the power spectral density vector h of the radar target, the power spectral density vector c of the clutter and The power spectral density vector n of the noise, the lengths of these three vectors are all M, M=B / f, where B is the bandwidth of the radar transmitting signal.

[0030] In step 2, the power spectral density vector of the optimal signal is obtained based on the maximization of the output signal-to-noise ratio SCNR.

[0031] The radar can improve the target detection performance of the radar system by optimizing the transmitted signal and ...

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Abstract

The invention discloses a multi-criterion radar emission signal design method based on phase modulation. The multi-criterion radar emission signal design method based on the phase modulation mainly solves the problems that an existing technical signal is single in optimization criterion and ideal and simple in environmental model. The realization process of the multi-criterion radar emission signal design method based on the phase modulation includes the following steps: (1) respectively conducting frequency domain sampling on power spectra of a radar target, clutter and noise, (2) obtaining a power spectral density vector of an optimal signal with the maximized output signal-to-noise ratio as a criterion, (3) obtaining a power spectral density vector of the optimal signal with the maximized mutual information between the radar received echo and the target as a criterion, (4) building a multi-criterion signal optimization function in a weighting mode after conducting dimension unifying on the criterion of the maximized output signal-to-noise ratio and the criterion of the maximized mutual information between the radar received echo and the target, and (5) solving a radar phase coding signal through iteration to make the multi-criterion signal optimization function smallest. The multi-criterion radar emission signal design method based on the phase modulation takes effects of the clutter into consideration, and is more flexible in signal design, capable of meeting working requirements of a multitask radar system and favorable for promoting working performance of the whole system of a radar.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a multi-criteria radar transmission signal design method based on phase modulation, which can be used for the design and optimization of radar transmission signals in a clutter environment and meets the working requirements of a multi-task radar system. Background technique [0002] Traditional radar usually works in a fixed frequency band, uses fixed transmission signals, or periodically transmits signals according to a certain fixed pattern, which limits the ability of traditional radars to change with changes in the external environment of the radar. Due to the increasingly complex working environment faced by radars, traditional radars are not flexible enough in target detection, tracking and identification. With the continuous development of technologies such as modern digital and arbitrary waveform generation, and the support of theoretical achievements such as en...

Claims

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Application Information

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IPC IPC(8): G01S7/282
Inventor 刘峥吴旭姿刘韵佛张清帅
Owner XIDIAN UNIV
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