CS-MIMO雷达中测量矩阵的构造方法研究

项目名称： CS-MIMO雷达中测量矩阵的构造方法研究

项目编号： No.61501233

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 彭珍妮

作者单位： 南京航空航天大学

项目金额： 19万元

中文摘要： 压缩感知技术与MIMO雷达的结合是目前雷达领域的一个研究热点。本项目充分挖掘MIMO雷达自身特点，借助混沌非线性系统良好的随机性，以降低雷达系统复杂度和提升重构性能为目标，积极探索CS-MIMO雷达中测量矩阵构造的新方法。（1）基于MIMO雷达发射信号正交性特点，利用混沌序列设计发射信号，将测量矩阵的构造转化为发射波形的设计问题，降低整个CS-MIMO雷达系统复杂度；（2）利用随机滤波器实现测量矩阵“压缩测量”功能，用混沌系统设计滤波器系数，降低测量矩阵硬件实现难度，并提出可行的滤波器等效测量矩阵优化方法；（3）利用阵元位置随机分布的阵列在空域实现“压缩测量”，将测量矩阵设计转化为MIMO雷达随机阵列配置问题，以较少的阵元完成CS-MIMO雷达场景重构。通过本项目的研究，拓展现有CS-MIMO雷达测量矩阵的构造思路和方法，对于降低系统复杂度，推动CS-MIMO雷达走向工程应用具有重要意义。

中文关键词： 新概念雷达；压缩感知；多输入多输出；测量矩阵；混沌非线性系统

英文摘要： The combination of compressive sensing and MIMO radar is now hot research in the field of radar. This project will investigate the new construction methods of the measurement matrix for CS-MIMO radar by exploring the characteristics of the MIMO radar system and the good randomness of the chaotic nonlinear systems. The goal of this project is to reduce the complexity and improve the reconstruction performance of CS-MIMO radar systems. (1)Based on the orthogonality of the transmitting signal of MIMO radar, by designing the transmitting signal with the chaotic sequence, the construction of the measurement matrix will be converted to the waveform design problem, which will reduce the complexity of the whole CS-MIMO radar system. (2)Using the random filter to implement the function of the measurement matrix will be considered, which will be convenient for hardware implementation of the measurement matrix. The coefficient of the random filter will be designed by the chaotic system and the equivalent measurement matrix optimization method will be proposed. (3) Employing arrays with its elements randomly distributed to realize spatial compressing, the design of measurement matrix will be converted to the random array configuration problem. Thus the scene recovery of the CS-MIMO radar will be performed with less antennas. The research of this project will expand the existing construction thoughts and methods of measurement matrix, and will play an important role in reducing the complexity of the system and promoting the CS-MIMO radar to engineering applications.

英文关键词： new concept radar;compressive sensing;multiple-input multiple-output;measurement matrix;chaotic nonlinear system