Abstract:
In limited data length, an improved algorithm based on data division and overlap reservation is proposed to realize detection of Direct Sequence Spread Spectrum(DS-SS) signal in low Signal Noise Ratio(SNR). The signal detection is realized by one-dimensional search in non-zero cyclic frequencies without prior knowledge. Experimental results show that the algorithm can restrain noise effectively, and it has a good detecting ability of DS-SS signal in low SNR.
Key words:
Binary Phase Shift Keying(BPSK),
Direct Sequence Spread Spectrum(DS-SS) signal,
cyclic spectrum,
limited data length,
data segmentation
摘要： 在有限数据长度条件下，针对低信噪比下的二相相移键控(BPSK)直接序列扩频(DS-SS)信号，提出一种基于数据分段和重叠保留处理的改进检测算法。该算法无需信号的先验知识，通过在非零循环频率上的一维搜索实现信号检测。实验结果表明，该算法能有效抑制噪声，在低信噪比下对于DS-SS信号具有较好的检测性能。
关键词:
二相相移键控,
直接序列扩频信号,
循环谱,
有限数据长度,
数据分段
CLC Number:
ZHENG Feng, ZHANG Xin, LIU Feng, DAO Ran. Improved BPSK DS-SS Signal Detection Algorithm Based on Cyclic Spectrum[J]. Computer Engineering, 2012, 38(08): 82-84.
郑鹏, 张鑫, 刘锋, 陶然. 基于循环谱的改进BPSK直扩信号检测算法*[J]. 计算机工程, 2012, 38(08): 82-84.