摘要
PSK 突发信号的识别和解调通常较为复杂。本文提出一种可工作在低信噪比条件下,结构较为简单、采用微处理器的移相式相关检测/解调方法。该过程为:对本机载频移相以获得信号的移相——相关序列,对该序列作谱分析实现信号识别与相位相干。文中还分析了噪声对系统的影响,建立了相关判决模型并给出最佳门限。
The demodulation for PSK burst communication systems is rather complicated in gener- al.Here a method based on microprocessor called‘Phase-shift Correlativity-detection/De- modulation’is presented,which can work in low SNR,completes recognition/demodulation of PSK burst signal and is comparatively simple.The process involves those of getting the phase-shift-correlativity series of signal by phase-shift of local-carrier,realizing the recogni- tion of signal and phase-coherent by spectrum analysis.Still this paper discusses the influence of noise,the model of correlativity-decision as well as the optimum threshold.
出处
《重庆邮电学院学报（自然科学版）》
1992年第2期25-32,共8页
Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)
