Equalization Reconstruction Algorithm Based on Reference Signal Frequency Domain Block Joint for DTMB-Based Passive Radar  

作　　者：Shuai Ma Zeqi Yang Hua Zhang Yiheng Liu Xiaode Lyu 

机构地区：[1]Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China [2]National Key Laboratory of Microwave Imaging Technology,Beijing 100190,China [3]School of Electronic Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China.

出　　处：《Journal of Beijing Institute of Technology》2024年第1期41-53,共13页北京理工大学学报（英文版）

摘　　要：Channel equalization plays a pivotal role within the reconstruction phase of passive radar reference signals.In the context of reconstructing digital terrestrial multimedia broadcasting(DTMB)signals for low-slow-small(LSS)target detection,a novel frequency domain block joint equalization algorithm is presented in this article.From the DTMB signal frame structure and channel multipath transmission characteristics,this article adopts a unconventional approach where the delay and frame structure of each DTMB signal frame are reconfigured to create a circular convolution block,facilitating concurrent fast Fourier transform(FFT)calculations.Following equalization,an inverse fast Fourier transform(IFFT)-based joint output and subsequent data reordering are executed to finalize the equalization process for the DTMB signal.Simulation and measured data confirm that this algorithm outperforms conventional techniques by reducing signal errors rate and enhancing real-time processing.In passive radar LSS detection,it effectively suppresses multipath and noise through frequency domain equalization,reducing false alarms and improving the capabilities of weak target detection.

关 键 词：passive radar frequency domain equalization reference signal reconstruction digital terrestrial multimedia broadcasting(DTMB) 

分 类 号：TN957.51[电子电信—信号与信息处理]