CMMB基带信道解调解码技术的实现方案  

Implementation on demodulating and decoding technology in broadcasting channel of CMMB

作　　者：颜千[1] 

机构地区：[1]同济大学电子与信息工程学院,上海201804

出　　处：《信息技术》2011年第4期73-76,共4页Information Technology

摘　　要：CMMB手机电视广播信道采用先进STiM i技术,无线信道的同步、载波频偏估计、信道估计和RS译码、LDPC译码这几个部分是CMMB解调系统研究的关键点。其中同步是OFDM技术中的关键技术之一,文中主要考虑时隙同步,符号同步和频率同步。RS和LDPC是CMMB系统中高效的两级前向纠错编码方式,其对应译码算法颇为复杂。The advanced STiMi technology is adopted in broadcasting channel of CMMB which includes several key points such as synchronization of wireless channel,estimation of carrier frequency offset,channel estimation,RS decode and LDPC decode etc.Synchronization is one of the critical technologies,time-slot synchronization,symbol synchronization and frequency synchronization would be the main considerations.RS and LDPC are the two-staged forward error correction coding method whose decoding algorithm is little complex.

关 键 词：移动多媒体广播 同步 信道估计 LDPC译码 CMMB 

分 类 号：TN929.5[电子电信—通信与信息系统]