小波与多分辨分析用于PN码捕获时刻的检测

DS－SS技术在CDMA系统中应用最为广泛，因此基于DS－SS方面的PN码捕获方法研究很多。传统的PN码捕获的判定是通过能量检测的办法进行的。基于PN码已被捕获时信号(被高斯白噪声污染的BPSK或QPSK信号）及未捕获信号（高斯白噪声）的特征，介绍了PN码捕获时刻的小波检测方法，并且研究了小波门限的性能。最后，对本检测方法的参数进行了统计，结果表明在这样的信号处理中，小波的多分辨分析具有优越的实用价值。

Application of Wavelet & Multi-Resolution Analysis to Detection of the Time of PN Code Acquisition

In the field of CDMA system, DS-SS technology has been used widely. Thereby, a great deal research on acquisition method of PN code is based on DS-SS. In the traditional way, the power detection method of judgment is used widely. Based on the characteristic of PN code acquired signal (namely BPSK signal or QPSK signal) and characteristic of un acquired signal (namely white Gaussian noise), this paper introduces the wavelet detection method of PN code acquisition time. Meanwhile, the performance of wavelet threshold is also studied. In the end, the statistics of parameters in this detection method is made. The result indicates that the wavelet & multi resolution has practical value in the signal processing.