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介绍了一个基于最大似然同步和频偏以及信道估计的OFDM系统的设计方案,及其在超短波无线通信系统中的应用。计算机仿真表明,最大似然算法进行同步和信道估计,使OFDM系统具有较好的抗符号间干扰的性能,且该算法对系统的设计要求不高,易于工程实现。
A design scheme of OFDM system based on maximum likelihood synchronization and frequency offset and channel estimation is introduced and its application in ultrashort wireless communication system is introduced. Computer simulation shows that the maximum likelihood algorithm performs synchronization and channel estimation, which makes the OFDM system better anti-intersymbol interference performance. The proposed algorithm has less design requirements for the system and is easy to implement.