一种用于卫星通信的自适应编码调制信号接收方法

摘要

针对常规接收方法接收自适应编码调制信号时存在的接收过程易中断、数据不连续等问题,提出了一种适用于卫星信道的自适应编码调制信号接收方法.该方法通过采用统一的解调结构实现对不同调制信号的连续跟踪;利用接收端保存的帧同步字调制波形副本与接收信号中的帧同步字波形的相关结果,对解调方式切换时载波相位跳变值进行估计和补偿,解决了帧同步的连续跟踪问题.与现有方法相比,该方法不需要导频信号,可节省系统开销.%For adaptive coding and modulation signal receiving,switching demodulation mode is apt to in-terrupt the signal reception and causes undesired data discontinuity using regular receiving methods. To mitigate the disadvantage,a new adaptive receiving method is presented. This method uses a unified de-modulation structure to realize the continuous track of various modulation signals. A correlation value of frame-synchronization-word( FSW) wave is measured between the FSW modulation wave saved in the re-ceiving terminal and the FSW wave in the received signal to implement the estimation and compensation of the phase error during the switch of demodulation modes. The continuous track of frame synchronization is consequently achieved. The simulations demonstrate the feasibility of the presented method.