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文中研究了中国移动多媒体广播系统(CMMB,China Mobile Multimedia Broadcasting)精确符号同步问题。首先,根据CMMB的时隙结构的特点,采用ML算法进行时隙同步,其次,详细讨论了在CMMB系统中如何通过求取信道冲激响应(CIR,Channel Impulse Response)进行精同步。通过Xilinx FPGA硬件实现的复杂度和存储大小进行分析,对第一径检测的方法进行了改进。最后用Matlab对文中的算法进行性能仿真,可以看出该同步算法在性能上也有提升。
In this paper, China Mobile Multimedia Broadcasting (CMMB, China Mobile Multimedia Broadcasting) exact symbol synchronization problem. First of all, according to the characteristics of the time slot structure of CMMB, the ML algorithm is used to perform the time slot synchronization. Secondly, how to perform the fine synchronization by obtaining the channel impulse response (CIR) in the CMMB system is discussed in detail. The first-path inspection method was improved by analyzing the complexity and storage size of the Xilinx FPGA hardware implementation. Finally, using Matlab to simulate the performance of the algorithm in the paper, we can see that the synchronization algorithm also improves the performance.