【摘要】 正交频分复用(OFDM)系统对同步误差非常敏感,特别是与频分多址(FDMA)、时分多址(TDMA)、和码分多址(CDMA)等多址方式结合使用时,同步显得尤为重要。首先对OFDM系统进行了描述,然后介绍了两种传统的经典OFDM同步算法,即Schmidl&Cox算法和Park算法,针对OFDM系统中对同步要求较高的问题,提出了针对训练序列的一种新的算法,在符号同步其它性能指标不变的情况下,该算法抗噪声和抗多径性能好,符号定时同步精确,在高斯环境下定时误差很小。更多还原

【Abstract】 Orthogonal Frequency Division Multiplexing(OFDM) systems are very sensitive to the synchronization error,particularly with frequencydivisionmultipleaccess(FDMA), Time Division Multiple Access (TDMA),and Code Division Multiple Access (CDMA) multiple access mode when used in combination,synchronization is very important. The OFDM system is described,and then introduces two kinds of traditional classical OFDM synchronization algorithm,namely Schmidl&Cox algorithm and Park algorithm. As for the OFDM system for synchronous request higher problem,proposed in view of the training sequence of a new algorithm of symbol synchronization,in other performance indicators remain unchanged,the algorithm of noise and multipath performance is good,symbol timing synchronization precision,in Gauss environment timing error is very small.更多还原