认知无线电中直扩信号检测方案设计

In Cognitive Radio system, the method and design for direct sequence spread spectrum signal detection will play an important role in the detection result their real-time characters. This paper gave a brief introduction to the principle of autocorrelation detection in time domain of DSSS signal. A method based on peak-to-average ratio was proposed and simulated the performance in different SNR and different FFT resolution of spectrum. At last, a threshold value was recommended.