基于松弛交替投影的MIMO雷达相位编码波形设计

发布时间：2018-02-04 03:07

本文关键词： MIMO雷达波形设计功率谱逼近相位编码交替投影　出处：《电子学报》2016年12期 　论文类型：期刊论文

【摘要】：任务场景日趋复杂给MIMO(Mutiple-Input Mutiple-Output)雷达带来诸多挑战.为应对强散射体遮蔽干扰、阵元间波形互扰及特定频带干扰等复杂电磁环境,该文提出一种松弛迭代谱拟合交替投影算法来设计相位编码波形.该算法基于功率谱拟合及交替投影框架,并引入扩展的加速因子;首先,凭借功率谱与非周期相关函数的傅里叶变换关系,将相关特性拟合问题转化为功率谱近似问题;然后,构建理想波形频谱并利用松弛机制扩展优化投影区;最后,利用快速傅里叶变换及加速交替投影机制迭代优化.计算机仿真表明,该算法运算效率高、可有效避免局部停滞,与当前流行算法相比更适合在线波形设计.
[Abstract]:The scene is becoming more and more complicated task to MIMO (Mutiple-Input Mutiple-Output) radar brings many challenges. In order to cope with the strong scatterer interference shielding, wave interference between elements and specific band interference in complex electromagnetic environment, this paper proposes a relaxation spectrum fitting alternating projection algorithm to design the phase encoding waveform. The algorithm and alternating power spectrum fitting a projection based framework, and the introduction of acceleration factor expansion; first, by virtue of Fourier transform relationship between power spectrum and non periodic function, the correlation fitting problem is transformed into power spectrum approximation problem; then construct the ideal waveform and the relaxation mechanism extends to optimize the projection area; finally, using fast Fourier transform and the accelerating mechanism of alternating projection iterative optimization. Simulation results show that the high efficiency of the algorithm, which can effectively avoid local stagnation, compared with the current popular algorithm is more suitable for online wave Shape design.

【作者单位】：哈尔滨工业大学电子与信息工程学院;
【基金】：国家自然科学基金(No.61371181)
【分类号】：TN958
【正文快照】： 1引言为应对复杂任务场景,雷达自适应性显得尤为重要.波形分集可视为自适应性的一种体现且成为目前研究的热点[1~3].对于MIMO雷达而言,波形分集既能提高目标识别能力又能提高分辨力,成为提升雷达自适应性的重要切入点[4~6].避免强散射体遮蔽干扰需发射波形具备较低的自相关旁

【相似文献】