| 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。 |
| 关键词: 直接序列扩频 模糊函数 参数估计 ANFIS网络 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（60672067）；广西教育厅科研项目
（桂教科研\[2008\]27号） |
|
| An Improved DS-SS Signal Parameters Estimation Method Based on Ambiguity Function |
| YANG Shuang,JI Jian-bo,ZHOU Ju-xuan |
| (Department of Electronic Engineering, Guilin College of Aerospace Technology,
Guilin 541004,China) |
| Abstract: |
| The method of direct sequence spread spectr
um(DS-SS) signal parameters estimation is analysed based on ambiguity function.I
t is found that there are errors in the estimation result of signal symbol trans
mission rate and PN ch
i
p period in lower SNR(Signal-to-Noise Ratio) environment. In order to solve this
problem,a
n improved method based on ANFIS network is proposed to increase the estimation
accuracy. The
computer simulation result has proved its effectiveness. |
| Key words: DS-SS ambiguity function parameter estimation ANFIS network |
