CMMB系统同步算法FPGA实现及验证  

Synchronization Algorithm for CMMB System FPGA Implementation and Verification

作　　者：孙宇明[1] 赵鹏[1] 王青[1] 朱倩[1] 

机构地区：[1]北京控制工程研究所,北京100190

出　　处：《互联网天地》2013年第4期80-84,共5页China Internet

摘　　要：为了提高CMMB系统广播信号接收同步精度,提出了一种使用CMMB信标进行载波和定时精确同步的算法。首先通过基于循环前缀的算法进行小数倍频偏估计和定时粗同步,再利用同步信号中伪随机序列的相关特性进行整数倍频偏估计和精确定时同步。仿真表明,在高斯白噪声下,CMMB系统同步算法的小数倍频偏性能与基于循环前缀的算法相当,但可以进行整数倍估计且定时精度高,在多径信道下,CMMB系统同步算法的估计精度优于基于循环前缀算法。实验结果验证了仿真的正确性。To improve the CMMB system broadcast signal receive synchronization precision, a fine carrier and timing fine synchronization algorithm based on CMMB beacon was presented. By means of the algorithm based on CP finish the fractional frequency estimation and coarse timing synchronization, and accomplish the integer frequency offset estimation and fine timing then. The simulation results show that, in additive white Gaussian noise channel, the new algorithm can accomplish the integer frequency estimation and the timing estimation precision is better than the algorithm based on CP when the fractional frequency estimation precision is the same,in the muhipath channel, the, new algorithm estimation precision is better than the algorithm based on CP. The practice result is the same as the simulation result.

关 键 词：正交频分复用 信标 定时估计 频率估计 

分 类 号：TN943[电子电信—信号与信息处理]