带波束形成的在单频网广播中的信道均衡

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．

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

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.