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Waveform optimization design method in frequency controlled array mimo radar system

A technique of radar system and design method, which is applied in the field of radar communication, and can solve problems such as CS-MIMO radar performance degradation

Active Publication Date: 2017-12-26
HUBEI UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, CS-MIMO radar performance degrades when the target deviates from the grid points

Method used

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  • Waveform optimization design method in frequency controlled array mimo radar system
  • Waveform optimization design method in frequency controlled array mimo radar system
  • Waveform optimization design method in frequency controlled array mimo radar system

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Embodiment Construction

[0080] refer to figure 1 and figure 2 , the specific implementation steps of the present invention are as follows:

[0081] Step 1, according to the needs of the target environment, determine the transmit carrier frequency, frequency increment, number of antennas and waveform symbol length of the frequency control array MIMO radar;

[0082] In the present invention, because the coherence characteristics of the receiving matrix at the receiving end are considered during the waveform design process, known waveforms can be transmitted at the beginning, and the transmission waveforms are optimally designed according to the coherence characteristics, so that the coherence of the received data is as low as possible.

[0083] Consider the model of a narrowband frequency-steered-array MIMO radar system, whose array consists of N transmitting antennas and M receiving antennas. The frequency control array MIMO radar system transmits N different transmission signals x(t), which are ex...

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Abstract

The invention discloses a waveform optimized design method for a frequency controlled array MIMO radar system, aiming to solve the problem that too much test data is to be processed for obtaining distance, angle, and resolution of high dimension Doppler. The implementation process is: 1) according to the target environment requirement, determining the transmitting carrier frequency, frequency increment, antenna quantity, and waveform code element length of the frequency controlled array MIMO radar; 2) according to a received data model, constructing decoupling between transmitted waveforms and virtual steering vectors; 3) according to a constructed data matrix, determining the coherence of the data matrix; 4) according to the coherent characteristics of matrix completion, designing transmitting waveform of the frequency controlled array MIMO radar by use of optimized method. By use of the method, through the transmitting waveform design for the frequency controlled array MIMO radar, the coherence of the received data is made as low as possible. Therefore, the method has an advantage that smaller data quantity is needed when accurate target detection and estimation are obtained; the method can be applied in frequency controlled array MIMO radar waveform design.

Description

technical field [0001] The invention belongs to the technical field of radar communication, and specifically relates to a new system frequency control array MIMO radar waveform design method, which is used in frequency control array MIMO radar while obtaining higher distance, angle and Doppler dimension resolution. , reducing the measurement data that needs to be processed. Background technique [0002] The concept of Frequency diverse array (FDA) was first proposed by P.Antonik et al. at the 2006 IEEE Radar Annual Meeting. P.Antonik pointed out that the beam scanning angle of the frequency-controlled array beamformer changes with the distance, which provides more flexible beam scanning and also provides a way to resist multipath interference. In FDA, there is a small frequency increment in adjacent array elements, which is constant relative to time and far smaller than the carrier frequency, so the transmitted signals partially overlap in the frequency domain. [0003] MI...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G06F17/50
CPCG01S7/02G06F30/367
Inventor 巩朋成李婕张正文贺章擎赵晓晴
Owner HUBEI UNIV OF TECH
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