Bistatic MIMO radar high-speed movement target parameter estimation method based on dual-frequency transmission

A technology of target parameters and high-speed movement, applied in the direction of re-radiation, radio wave reflection/re-radiation, and measurement devices, can solve the problems of sacrificing the performance of matched filters, easy fluctuations, and the difficulty of effectively forming virtual arrays for MIMO radars. Achieve the effect of long-term accumulation and elimination of random phase

Active Publication Date: 2014-05-28
常熟紫金知识产权服务有限公司
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Problems solved by technology

This method expands the Doppler tolerance of the matched filter by reducing the duration of the matched filter, but this sacrifices the performance of the matched filter, which also makes it difficult for the MIMO radar to effectively form a virtual array
Most of the existing distance walking correction methods usually re...

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  • Bistatic MIMO radar high-speed movement target parameter estimation method based on dual-frequency transmission
  • Bistatic MIMO radar high-speed movement target parameter estimation method based on dual-frequency transmission
  • Bistatic MIMO radar high-speed movement target parameter estimation method based on dual-frequency transmission

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[0025] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.

[0026] The bistatic MIMO radar high-speed moving target parameter estimation method based on dual-frequency transmission of the present invention comprises the following steps:

[0027] Step 1: The receiving array of the bistatic MIMO radar receives the echo signals of high-speed and high-maneuvering targets, and the echo signals of the receiving array are separated according t...

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Abstract

The invention discloses a bistatic MIMO radar high-speed movement target parameter estimation method based on dual-frequency transmission. Echo signals of high-speed high-mobility targets are received through a receiving array of bistatic MIMO radar, and the echo signals of the receiving array are divided according to different carrier frequencies; conjugate multiplication is conducted on the two routes of echo data obtained through division, and whole cycle integration is conducted in a rapid time domain; Fourier conversion is conducted on the integrated data in a slow time domain, and each target speed is estimated; high-speed target matching filtering functions are set up; matching filtering is conducted on the echo signals of the receiving array to form a virtual array; the transmission angle of each target and the receiving angle of the target are estimated. The range walk of the high-speed targets is corrected according to the characteristic of the echo signals of the dual-frequency transmission MIMO radar, the problem that the parameter estimation performance is influenced by unstable factors such as Doppler spread and RCS rapid fluctuation is solved, and MIMO radar parameter estimation under the high-speed high-mobility targets is achieved.

Description

technical field [0001] The invention relates to the application field of a multiple-input multiple-output radar system, in particular to a parameter estimation method for a high-speed moving target of a bistatic MIMO radar based on dual-frequency transmission. Background technique [0002] Target detection is an important task of radar. However, in recent years, radars are facing serious challenges of high-speed and high-maneuvering targets, such as hypersonic and highly maneuvering fighter jets and missiles in the field of air defense, as well as orbital targets and space debris that need to be monitored when developing space resources. Modern radars usually use matched filtering and multi-pulse long-term coherent accumulation technology to improve the echo signal-to-noise ratio of low-observable targets, so as to achieve effective detection of low-speed moving targets. However, for high-speed and high-maneuvering targets, the high Doppler frequency it brings will cause se...

Claims

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Application Information

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IPC IPC(8): G01S13/50G01S7/41
CPCG01S7/41G01S13/50
Inventor 陈金立李家强朱艳萍顾红
Owner 常熟紫金知识产权服务有限公司
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