一種基于先驗信息的機載MIMO雷達發(fā)射方向圖設(shè)計方法
doi: 10.11999/JEIT140911
基金項目:
國家自然科學基金(61271291, 61201285)，新世紀優(yōu)秀人才支持計劃(NCET-09-0630)，全國優(yōu)秀博士學位論文作者專項資金(FANEDD- 201156)，國家省部委基金和中央高校基本科研業(yè)務(wù)費專項資金資助課題
A Beampattern Design Method for Airborne MIMO Radar Based on Prior Information
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摘要: 在非均勻雜波背景下，針對旁瓣雜波抑制問題，該文提出一種基于先驗信息的機載多輸入多輸出(MIMO)雷達發(fā)射方向圖設(shè)計方法。該方法利用目標和雜波在空域和多普勒域的2維先驗信息，以最大化雷達空時匹配濾波后的輸出信雜噪比(SCNR)為準則，建立關(guān)于發(fā)射信號相關(guān)矩陣的優(yōu)化代價函數(shù)，并采用半正定規(guī)劃(SDP)方法進行求解。仿真表明，在非均勻雜波背景下，采用該文方法優(yōu)化設(shè)計的發(fā)射方向圖可有效提高空時2維匹配濾波后的輸出信雜噪比。Abstract: A beampattern design method for the airborne Multiple Input Multiple Output (MIMO) radar based on the prior information is proposed to suppress the sidelobe clutter in the non-homogeneous clutter environment. Using the two Dimensional (2D) prior information of the target and clutter in the spatial and Doppler domain, the cost function for the correlation matrix of the transmission waveform is established by employing the maximum output Signal-to-Clutter-plus-Noise Ratio (SCNR) criterion after the space-time matched filter and it can be solved by the Semi-Definate Programming (SDP). The simulation results indicate that the transmission beampattern optimized by the proposed method is able to increase effectively the SCNR output after the space-time 2D matched filter in the non-homogeneous clutter environment.
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