摘要
针对低信噪比直接序列扩频 (DS/ SS)信号难以检测的问题 ,特别是 Q PSK调制的直扩信号 ,本文提出了一种新的相关检测方法。该方法将 PSK信号的自相关函数能量集中时段提取出来处理 ,从而提高检测性能。计算机仿真表明 ,在信号带宽内信噪比为 -12 d B时 ,该方法不仅能够有效检测 Q PSK调制的直扩信号 ,而且对 BPSK调制的直扩信号也有同样的检测性能。
In this paper, we propose a new detection method based on correlation to solve the difficulty of detecting DS/SS signal with low SNR, especially QPSK DS/SS signal It picks up the energy of selfcorrelation function in the centralized time quantum to process, so that the performance of detection is improved The results of computer simulations show that when the SNR is -12 dB in the bandwidth of signal, the method can detect not only QPSK DS/SS signal but also BPSK DS/SS signal effectively
出处
《现代电子技术》
2005年第5期50-51,55,共3页
Modern Electronics Technique
