突发模式下h=1/8的8CPFSK信号定时估计  

Timing of burst mode 8CPFSK signal with h=1/8

作　　者：张屹[1] 宋征卫[1] 赵民建[1] 

机构地区：[1]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《电路与系统学报》2008年第5期141-144,共4页Journal of Circuits and Systems

摘　　要：针对突发模式下需要快速准确的定时同步要求,提出了一种适用于h=1/8LRC成形的8CPFSK调制信号定时估算方法。该方法在每个数据包前嵌入特定的前导字序列,通过计算信号自相关的平方和FFT变换提取出定时信息。仿真结果和DSP硬件电路测试都表明该方法可以快速准确地实现定时同步,适用于突发模式非相干解调系统。To satisfy the demand of accurately and rapidly timing synchronize in the burst mode, a symbol timing algorithm is proposed for pulse shaped 8-CPFSK with h=0.125. In this algorithm, certain preamble sequences are first embedded in each data packet. By calculating the square of the autocorrelation of the signal and Fast Fourier transformation （FFT）, the timing information parameters can be acquired. Simulation results and field experiments on the DSP hardware circuits in the actual wireless environment show that the proposed algorithm can acquire clock synchronization rapidly and accurately. This algorithm can be exploited in the noncoherent demodulation system in burst mode.

关 键 词：MCPFSK 定时估计 

分 类 号：TN929.5[电子电信—通信与信息系统]