一種循環(huán)迭代的寬帶MIMO雷達(dá)正交稀疏頻譜波形設(shè)計(jì)方法

李玉翔; 任修坤; 孫揚(yáng); 鄭娜娥

doi:10.11999/JEIT160597

一種循環(huán)迭代的寬帶MIMO雷達(dá)正交稀疏頻譜波形設(shè)計(jì)方法

doi: 10.11999/JEIT160597 cstr: 32379.14.JEIT160597

基金項(xiàng)目:

國家自然科學(xué)基金(41301481)

計(jì)量
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出版歷程
- 收稿日期: 2016-06-06
- 修回日期: 2016-11-02
- 刊出日期: 2017-04-19

Cyclic Iterative Method for Wideband MIMO Radar Orthogonal Sparse Frequency Waveform Design

Funds:

The National Natural Science Foundation of China (41301481)

摘要

摘要: 甚高頻(VHF)和超高頻(UHF)寬帶MIMO雷達(dá)在實(shí)現(xiàn)目標(biāo)高分辨與成像方面表現(xiàn)出巨大潛力，但也面臨著工作頻段擁塞和電磁信號干擾問題。針對這一問題，該文提出一種基于循環(huán)迭代的寬帶MIMO雷達(dá)正交稀疏頻譜波形設(shè)計(jì)方法。首先，將期望頻譜矩陣作為待優(yōu)化的輔助變量，綜合考慮最小化發(fā)射波形頻譜與期望頻譜之間的均方誤差以及積分旁瓣電平為目標(biāo)函數(shù)，以發(fā)射波形恒模和期望頻譜幅度滿足上、下界約束為條件建立優(yōu)化模型；然后，在循環(huán)迭代的算法框架下，為提高運(yùn)算效率，利用快速傅里葉變換和譜分解技術(shù)實(shí)現(xiàn)模型的求解。仿真結(jié)果表明，優(yōu)化波形較現(xiàn)有方法具有更好的稀疏頻譜特性，同時(shí)還具有低自相關(guān)旁瓣和互相關(guān)性。
- 寬帶MIMO雷達(dá) /
- 稀疏頻譜 /
- 正交波形 /
- 循環(huán)迭代
Abstract: Wideband MIMO radar exhibits great potential in achieving the goals of high resolution imaging, but it also suffers from the electromagnetic signal congestion and interference problems, especially for radar that works in Very High Frequency (VHF) and Ultra High Frequency (UHF) band. To solve this problem, a cyclic iterative method for designing orthogonal sparse frequency waveforms is proposed. Firstly, the desired spectrum is used as an auxiliary variable, and a new objective function is constructed based on both the mean square error of the spectrum of transmitting waveform with the desired one and the integration side-lobe levels. The optimization model is established under the constraint that the waveform is constant envelope meanwhile the spectrum magnitude lies between the pre-established upper and lower bounds. Then, under the framework of cyclic iterative algorithm, fast Fourier transform and spectral decomposition techniques are used to improve computational efficiency. Simulation results show that the proposed method has good performance in designing orthogonal sparse frequency waveforms with low auto-correlation and cross-correlation side lobes.
- Wideband MIMO radar /
- Sparse frequency /
- Orthogonal waveform /
- Cyclic iterating

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