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无监督条件下直扩信号特征码型估计方法

Unsupervised neural network based DS signal code sequence estimation
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摘要 针对于直序列扩频(DSSS)信号盲检测过程中,事先对用户信号特征序列未知这一情况,提出一种应用于非合作条件下对单用户DSSS系统的特征序列的自组织特征映射神经网络(SOFM)估计算法[1,2]。理论计算表明,该算法比传统的滑动相关检测法运算量小。仿真结果表明,该方法在非合作、低信噪比条件下实现对DSSS的解扩是可行的。同时,由于该方法是基于神经网络的训练和学习,有很强的适应性,是一种自适应解扩方法。 An idea of detection and blind estimation of direct sequence spread spectrum (DSSS) signal in low SNR is presented. Having not the apriority knowledge about the DSSS signal in the non-cooperation condition, we apply self-organizing feature map (SOFM) neural network theory^[1,2] to detect and identify the signal parameter and PN sequence. The computer simulation and experiment test demonstrates that the algorithm is effective. Comparing the traditional slip-correlation method, the SOFM algorithm's BER and implementation complexity is lower.
出处 《电路与系统学报》 CSCD 北大核心 2009年第3期103-106,共4页 Journal of Circuits and Systems
基金 国家自然科学基金资助项目(60472052)
关键词 SOFM神经网络 DSSS信号 盲检测 SOFM neural network blind estimation DSSS signal
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参考文献7

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