带波束形成的在单频网广播中的信道均衡  

A Channel Equalization Method with Beamformer in Single Frequency Network (SFN)

作　　者：张立军[1] 归琳[1] 乔艳涛[1] 张文军[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030

出　　处：《上海交通大学学报》2004年第11期1857-1860,共4页Journal of Shanghai Jiaotong University

摘　　要：针对数字电视地面广播在单频网(SFN)应用中的复杂多径问题,提出了一种基于多输入多输出(MIMO)系统的SFN信道模型,以获取信号的空间信息,从而得到一种新的均衡方案.该方案用波束形成器将来自不同发射机的信号进行分离,有效避免了在此过程中SFN信号固有的大时延和大幅度多径,输出的各路信号通过一组均衡器,再经过相位和时延校正后合并输出,得到SFN增益.仿真结果表明,这种方法比传统的均衡方法得到了更快的收敛速度和更好的性能.In digital television terrestrial broadcasting (DTTB),to cope with the complex multi-path problem in single frequency network (SFN), an SFN channel model based on a multi-input and multi-output(MIMO) system was proposed. A new equalization scheme was derived from the model which exploits the space information of signal. A beamformer is used to separate signals which come from different directions. The SNF inherent large delay and large multi-path are avoided, and the SFN gain is obtained. The simulation shows the superiority of the method.

关 键 词：数字电视 单频网 波束形成 信道均衡 

分 类 号：TN934.3[电子电信—信号与信息处理]