最大似然估计算法及其电路实现  

ML Estimation Algorithm and Its Hardware Implementation

作　　者：齐华[1] 刘军[2] 艾渤[2] 

机构地区：[1]西安工业学院,陕西西安710032 [2]武警工程学院,陕西西安710086

出　　处：《弹箭与制导学报》2003年第3期65-68,共4页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：研究了正交频分复用OFDM(OrthogonalFrequencyDivisionMultiplexing)系统中的时域符号同步技术,通过对一种利用最大似然ML(MaximumLikelihood)估计[1-3]进行时域符号粗同步的算法的仿真分析,提出了相应的FPGA(FieldProgrammableGateArray)硬件电路设计方案,经高清晰度电视HDTV(HighDefinitionTV)样机现场测试,证明所给算法的可行性和有效性。This paper investigates the symbol synchronization in HDTV. Through Matlab and Quartus simulation, it presentes an algorithm for coarse symbol synchronization in time domain, which utilizes ML estimation and is suitable for BDB-T COFDM transmission system. A correspondent hardware designed scheme based on FPGA is proposed with excellent performance through testing process in the functional HDTV.

关 键 词：最大似然估计 正交频分复用 OFDM系统 数字视频广播 时域符号 粗同步 电路 高清晰度数字电视 现场可编程门阵列 

分 类 号：TN934.3[电子电信—信号与信息处理]