数字电视接收机中的Block-DFE算法研究  

Research of Block Decision Feedback Equalization Algorithm for Digital TV Receiver

作　　者：黄秋元[1] 许艳[1,2] 龙必起 

机构地区：[1]武汉理工大学信息学院,湖北武汉430070 [2]江西理工大学应用科学学院,江西赣州341000 [3]上海明波通信技术有限公司,上海201203

出　　处：《电视技术》2009年第5期50-52,共3页Video Engineering

摘　　要：针对地面数字电视传输国家标准(DTMB),研究并提出一种新的数据块判决反馈均衡算法。该算法利用QR因式分解以解决最小二乘方探测问题。通过Matlab仿真对传统判决反馈均衡算法(DFE)、循环构造频域均衡算法(OLA-FDE)和数据块判决反馈均衡算法(Block-DFE)在不同信噪比下的性能作了比较,验证了Block-DFE算法的优越性。A new block decision feedback equalization algorithm used in Chinese Digital Terrestrial/Television Multimedia Broadcasting(DTMB) is presented in this paper.The algorithm relies on a QR factorization approach to the least-squares detection problem.The performance of traditional Decision Feedback Equalization(DFE) algorithm,Overlap and Add Frequency Domain Equalization(OLA-FDE) algorithm and Block Decision Feedback Equalization(Block-DFE) algorithm under different SNR is compared by Matlab simulation,which proves the advantages of Block-DFE algorithm.

关 键 词：地面数字电视传输国家标准 数据块判决反馈均衡 最小二乘方 QR因式分解 

分 类 号：TN911.5[电子电信—通信与信息系统]