改进的基于FFT的伪码快速捕获法  

Improvement of FFT-based pseudo-code fast acquisition method

作　　者：窦建华[1] 李雪[1] 王守亚[1] 

机构地区：[1]合肥工业大学计算机与信息学院,安徽合肥230009

出　　处：《微型机与应用》2013年第15期63-65,共3页Microcomputer & Its Applications

摘　　要：为了更好地适合在低信噪比环境下工作,对基于FFT的伪码快速捕获法进行了改进,即提出了将多个伪码周期进行相关运算后进行非相干积累。对其原理进行了详细的分析,并对它的捕获性能进行了仿真。通过分析和仿真结果可以看出,采用非相干处理的基于FFT的伪码快速捕获法捕获时间更短,并且更适合在低信噪比环境下工作,具有重要的工程应用价值。In order to fit better in the low SNR environment, FFT-based pseudo-code fast acquisition method is improved inthe paper, which put forward to carry out noncoherent accumulation after accomplishing correlation operation of multiply pseudo codecycle.This paper has carried on detailed analysis of its theory, and simulation for its capture performance. Through the analysis and results canbe seen that the incoherent processing of FFT-based pseudo-code fast acquisition method to capture time shorter, and more suitable forworking in a low SNR environments. It has important value in engineering.

关 键 词：伪码同步 捕获 快速捕获 非相干积累 

分 类 号：TN914.4[电子电信—通信与信息系统]