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: |
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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) |
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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 |