一种改进的类零相关正交多相码设计方法  

Improved Design of Zero-Correlation-Zone-Like Orthogonal Polyphase Code Waveform

作　　者：孙颖[1] 何子述[1] 刘娜[1] 李军[1] 林华[2] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731 [2]中国工程物理研究院电子工程研究所,四川绵阳621900

出　　处：《雷达科学与技术》2014年第3期273-279,284,共8页Radar Science and Technology

基　　金：国家自然科学基金(No.61032010;61201280);国家自然科学基金联合基金(No.11076006)

摘　　要：正交波形设计是MIMO雷达的关键问题。精心设计的正交波形能显著提高MIMO雷达性能。针对正交波形设计问题,提出了一种具有严格正交性的类零相关正交多相码设计方法。应用该方法设计的波形具有严格正交性,且在零相关区域不但具有低自相关旁瓣和低互相关,而且在经匹配滤波和等效发射波束形成之后具有高主副比及良好的多普勒容忍性。设计思路是首先利用序列二次规划方法设计得到满足上述性能的连续相位编码,之后将其量化为离散的正交多相码。仿真结果验证了所提方法的有效性和实用性。Orthogonal waveform design is the key problem of the MIMO radar. Elaborately designed orthogonal waveform can improve the radar performance. For this reason, a zero-correlation-zone-like orthogonal polyphase code design method is proposed. The orthogonal waveforms obtained by the proposed method have strict orthogonality, low autocorrelation sidelobe, and low cross-correlation in zero correlation zones. And also, high mainlobe to peak sidelobe ratio（MPSR） and good Doppler tolerance are relized after the matched filtering and equivalent transmit beamforming. The sequential quadratic programming method is used to design the continuous phase code that satisfies the above design requirements. Then it is quantified to be the discrete polyphase code. Eventually, the optimal waveform is obtained, which can directly used in practice. The simulation results verify the validity and practicability of the proposed method.

关 键 词：MIMO雷达 类零相关码 序列二次规划 距离高分辨 

分 类 号：TN958[电子电信—信号与信息处理] TN911.7[电子电信—信息与通信工程]