【摘要】 提出了一种适用于高速率QAM调制信号的NDA相位恢复算法,利用差分编码对该算法加以改进,以期扩展算法的处理范围。采用对QAM信号进行差分编码来获取同步信息的方法消除相位估计算法遗留的相位模糊问题,组建一套不需要数据辅助的数字解调算法结构。通过仿真说明改进后的算法有效解决了不足,为该算法应用于全数字接收机中提供了实现方案。更多还原

【Abstract】 The paper presents an algorithm to NDA phase recovery for high-speed QAM modulated signal,and improves it by differential encoding for the purpose of larger processing field.The simulated value indicates that the improved algorithm solved the shortcoming of the former effectively,and provides a practical solution of application to all digital receiver.更多还原