中文摘要：

分析了基于模糊函数的直接序列扩频信号参数估计方法,研究了该方法在低信噪比环境下针对信号码元传输速率、码片周期等参数估计结果的有效性。在此基础上,提出了一种利用ANFIS（自适应神经模糊推理系统）网络先行去噪,再进行信号参数估计的改进方法。计算机仿真结果证明了这一改进方法的有效性。

英文摘要：

The method of direct sequence spread based on ambiguity function. It is found that there spectrum （ DS - SS） signal parameters estimation is analysed are errors in the estimation result of signal symbol transmission rate and PN chip period in lower SNR（Signal- to- Noise Ratio） environment. In order to soIve this problem, an improved method based on ANFIS network is proposed to increase the estimation accuracy. The computer simulation result has proved its effectiveness.