摘要
提出一种基于过采样的直接序列扩谱(Direct-Sequence Spread Spectrum,DS-SS)/二进制相移键控(Binary Phase Shift Keyed,BPSK)信号延迟相乘多重相关检测方法,并推导了延迟相乘相关原理,分析了基于过采样的延迟相乘相关方法对输出信噪比(Signal to Noise Ratio,SNR)的影响。理论推导和仿真证明,基于过采样的延迟相乘恢复DS-SS/BPSK信号载波方法保留了待测信号中噪声的高斯白噪声特性;采用多重相关的方法还可进一步提高输出信噪比。
The DS-SS/（ Binary Phase Shift Keyed, BPSK ） signal detection approach with delay muhiplication multi-correlation is proposed in this paper. The principium of delay multiplication correlation is deduced; the influence on output SNR （Signal to Noise Ratio） relative to delay multiplication multi-correlation based on over sampling is analyzed. The theoretical analysis and simulation show that delay multiplication correlation based on over sampling can recover the carrier of DS-SS/BPSK signal and remains the additive Gaussian white noise characteristic of input noise at the same time; in addition, its output SNR can he increased by passing through multicorrelation detectors.
出处
《信息与电子工程》
2006年第5期351-355,共5页
information and electronic engineering
