【摘要】 介绍了直扩系统中利用匹配滤波器方法进行捕获的特点和电路结构,重点研究了在高斯白噪声环境下采用部分周期相关匹配滤波器捕获方法的性能,推导了捕获方法的检测概率和虚警概率。最后利用Simulink对匹配滤波器捕获方法进行了仿真,给出了对应不同匹配长度和不同门限的检测概率和虚警概率曲线。更多还原

【Abstract】 A new PN code acquisition method is proposed based on the correlation of part PN period. The probability of detection and probability of alarm of this acquisition method is discussed in the presence of AWGN channel. In the end, the paper apply simulink to simulate the acquisition method based on matched filter, and give the simulation result which corresponds to the different filter length and different threshold.更多还原