突发模式通信中MMPE位同步方法的实现

Realization of MMPE Bit Sychronization Method in Burst Communication

针对突发模式通信中信号持续时间短、位同步难度大的特点,研究了最大平均功率(MMPE)位同步方法,即利用平均功率最大的采样时刻来估计最佳采样点,借助MATLAB仿真分析了观察区间长度对同步性能的影响,并结合FPGA与DSP实现了MMPE同步方法。测试结果显示,位同步抖动范围小于符号周期的8%。

According to the features of short signal duration and difficult bit synchronizaiton in burst communica- tion, the Maximum Mean Power Estimation（MMPE） bit synchronization method is studied, that is estimating the best sampling point by use of the sampling time with maximum mean power. The impact of length of observation time on synchronization is simulated with MATLAB. The MMPE method is realized based on FPGA and DSP. The test result shows that the dither range is less than 8 % of the symbol period.