移动多媒体广播SOFDM系统4M新传输模式

摘要

Inspired by the creative work of designing a new 4k transmitting mode in EURO DVB-H system, and based upon the existing 8M/2M modes in China mobile multimedia broadcasting (CMMB) system, a novel 4M transmitting mode for satellite orthogonal frequency division multiplexing (SOFDM) was proposed. The 4M mode was demonstrated that it can provide a higher data rate than the 2M mode, as well as a more sufficient spectrum utility than the 8M mode. As a result, according to a more reasonable pilots and data patterning, 4M mode presents a better BER performance in comparison with 4k mode.%借鉴欧洲DVB-H标准对OFDM系统研究新的4k传输模式这一思想,在中国移动多媒体广播SOFDM系统现有的8M和2M传输模式的基础上,提出并设计了一种新的传输模式-4M模式.理论研究表明,4M模式比2M模式具有更高的数据传输率,比8M模式具有更高的频谱利用率,为中国移动多媒体广播SOFDM信道传输体制的拓展与完善问题探索出了一条通用的技术途径.仿真分析表明,4M模式的导频和数据子载波分布合理,信道传输误码性能整体优于欧洲同类标准4k模式.