频率分集分布式子阵雷达的相参积累检测方法  

Coherent Detection for Frequency Diversity Separated Sub-Array Radar

作　　者：姜伟[1] 吴嗣亮[1] 原浩娟[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《北京理工大学学报》2010年第1期95-99,共5页Transactions of Beijing Institute of Technology

基　　金：国家部委预研项目(020045089)

摘　　要：为了实现频率分集分布式子阵雷达的相参积累检测,提出一种基于广义似然比检验(GLRT)和条件广义似然比检验(CGLRT)的检测方法.分析了该方法的积累检测性能和解角度模糊性能,并且针对由频率分集引起的多普勒差异问题,提出基于Keystone变换的多普勒补偿方法.理论分析和仿真结果表明,与单频工作的分布式子阵雷达相比,频率分集分布式子阵雷达具有更好的相参积累检测性能,并且能够降低栅瓣的影响,提高解角度模糊能力.通过Keystone变换可在目标径向速度未知的情况下,进行多普勒差异的补偿,实现频率分集分布式子阵雷达的相参积累检测.A new coherent detection method based on generalized likelihood ratio test（GLRT） and constrained GLRT（CGLRT） is proposed, which can be used in coherent detection for frequency diversity separated sub-array radar. The Keystone transform is employed to compensate the Doppler frequency discrepancy introduced by frequency diversity. Theoretical analysis and simulation results show that frequency diversity separated sub-array radar obtains better detection performance and better angle ambiguity resolution performance compared with its counterpart using single frequency, and the Doppler frequency discrepancy can be compensated by the Keystone transform regardless of the unknown target radial velocity.

关 键 词：频率分集 分布式子阵 相参积累检测 广义似然比检验 KEYSTONE变换 

分 类 号：TN958.92[电子电信—信号与信息处理]