单比特量化信号空域谐波抑制与目标重构方法  

Spatial Harmonic Suppression and Target Reconstruction Method for 1-bit Quantization Signal

作　　者：徐新菊 叶佩平 金林[3] 姚元[3] 吴刚[3] 晋本周 XU Xinju;YE Peiping;JIN Lin;YAO Yuan;WU Gang;JIN Benzhou(College of Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;China Electronics Technology Group Corporation,Beijing 100846,China;Nanjing Research Institute of Electronics Technology,Nanjing 210039,China)

机构地区：[1]南京航空航天大学电子信息工程学院,南京211106 [2]中国电子科技集团有限公司,北京100846 [3]南京电子技术研究所,南京210039

出　　处：《现代雷达》2022年第8期20-24,共5页Modern Radar

基　　金：国家自然科学基金资助项目(61971218)。

摘　　要：对于单比特量化信号,常规线性处理方法难以有效抑制非线性量化导致的谐波分量。文中提出了一种基于线性与非线性联合的空域谐波抑制与目标重构方法。首先,基于线性预处理和预检测,获取接收信号的主要分量,建立降维观测模型;然后,基于广义消息传递算法,对降维后的信号模型进行求解,抑制谐波分量并对真实目标进行重构。针对网格失配问题,通过对预检测结果进行参数估计,实现了对降维模型的修正。仿真结果表明:文中所提方法可对真实目标进行重构,并有效抑制单比特量化导致的空域谐波。For 1-bit quantization signal,conventional linear processing method can not suppress the harmonic component caused by nonlinear quantization.A joint method is proposed to perform harmonic suppression and target reconstruction in spatial domain based on linear and nonlinear combination.Firstly,based on linear preprocessing and predetection,the main components of the received signal are obtained and the dimension reduction observation model is established.Secondly,based on the generalized approximate message passing(GAMP),dimension reduction signal model is solved so as to suppress harmonic components and reconstruct true targets.To address the grid mismatch problem,the dimension reduction model is modified by estimating the parameters of predetected targets.Simulation results show that the proposed method can reconstruct true targets and effectively suppress the spatial harmonics caused by 1-bit quantization.

关 键 词：单比特量化 谐波抑制 非线性重构 

分 类 号：TN957.51[电子电信—信号与信息处理]