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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。
Drawing on the European DVB-H standard to study the new 4k transmission mode of OFDM system, this paper proposes and designs a new transmission mode based on the existing 8M and 2M transmission modes of China Mobile Multimedia Broadcasting System (SOFDM) 4M mode. Theoretical studies show that 4M mode has a higher data transmission rate than 2M mode and has a higher spectrum utilization rate than 8M mode, which explores a common technical approach for the expansion and improvement of China Mobile Multimedia Broadcasting System SOFDM channel transmission . Simulation analysis shows that the 4M mode pilot and data subcarriers are distributed rationally, and the performance of channel transmission errors is better than that of similar standard 4k mode in Europe.