OFDM系统中基于序列组间距离传输信令信息  

Signalling transmission based on the distances between training sequences for OFDM systems

作　　者：郝博[1] 王军[1] 王昭诚[1] 

机构地区：[1]清华大学电子工程系清华信息科学与技术国家实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2013年第7期972-976,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(60902003);教育部博士基金资助项目(20090002120026)

摘　　要：随着正交频分复用(OFDM)系统应用环境的增多,需要定义更多的信令信息以实现系统物理层配置的多样性,从而使得在不同信道环境下系统均具有与之较匹配的模式并实现最佳性能。欧洲第二代数字地面广播DVB-T2系统中就定义了2种分集模式、7种保护间隔以及6种快速Fourier变换(FFT)长度。该文在该系统基础上,提出以多个训练序列之间相对距离传输信令的方法,并对传输序列的数量、携带信息量及误检门限进行了分析。研究和仿真表明:该方法在提高了信令信息的传输容量的同时,减小了相关器的复杂度,并且达到了DVB-T2系统S2信令的误码性能。Increases in orthogonal frequency division multiplexing （OFDM） system application environments mean that more signaling must be defined to ensure the system diversity configuration of physical layer, This system has better matched patterns and achieves the optimum performance in different channel environments. Europe＇s second-generation digital terrestrial broadcasting DVB-T2 has defined 2 kinds of diversity modes, 7 kinds of guard intervals and 6 kinds of FFT lengths. A signalling transmission method based on this system was developed using relative distances between the training sequences. Analyses and simulation results show that this method improves the signaling capacity, reduces the receiver complexity and achieves the performance of $2 signaling in the DVB-T2 system.

关 键 词：正交频分复用(OFDM) 序列组 传输信令 相对距离 

分 类 号：TN945.4[电子电信—信号与信息处理]