定时恢复是数字接收机同步系统的关键技术。经典数字接收机为防止最佳采样点抽取发生偏移造成接收信号散点图发散,往往通过锁相环控制抽样器以实现最佳采样点的抽取,而在全数字接收机中,最佳采样点是通过对采样信号进行插值计算得到的。全数字相位调制接收机定时恢复环路主要由平方定时相位偏差估计、定时控制单元和牛顿内插滤波器三部分组成。仿真结果充分表明该环路能够很好的实现MPSK、MQAM信号的定时恢复。 Timing recovery is the key technology of digital receiver synchronization system. Classical digital receiver in order to prevent the best sampling point offset caused scatter the received signal scatter, often through the phase-locked loop control sampler in order to achieve the best sampling point extraction, and in the all-digital receiver, the best sampling The point is calculated by interpolating the sampled signal. The all-digital phase modulation receiver timing recovery loop is mainly composed of square timing phase deviation estimation, timing control unit and Newton interpolation filter. The simulation results fully show that the loop can well achieve the timing recovery of MPSK and MQAM signals.