扩频码快速捕获的瞬时相关谱估计法  

REALIZATION OF FAST ACQUISITION OPTIMUM RECEIVER BY INSTANT CORRELATION SPECTRAL ESTIMATION

作　　者：程翥[1] 王壮[1] 皇甫堪[1] 庄钊文[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2002年第10期1385-1390,共6页Journal of Electronics & Information Technology

基　　金：国家部级基金

摘　　要：该文提出了一种低信噪比大多普勒频移条件下扩频码快速捕获的方法,该方法依据回波信号与本地扩频码瞬时相关谱上的显著峰值的存在性判决信号的存在性,与前人的方法相比,该方法在简化了系统复杂性的同时保持了并行多通道最优接收机的性能。This paper presents a new method of fast code acquisition under low SNR, and large Doppler shift condition. The method gives decision base on the peak existence in the spectral of instant correlation between the local code and the zero-IF received signal. This scheme not only promises a performance as good as that of parallel channel optimum receiver but also has a much simpler structure.

关 键 词：扩频码 快速捕获 瞬时相关 谱估计法 傅氏变换法 扩频系统 

分 类 号：TN914.42[电子电信—通信与信息系统]