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针对高速无线数据通信系统中的关键技术——正交频分复用,提出一种高效联合算法,即用同一组训练序列同时实现系统整数倍频偏同步、信道估计和降低峰均比。其主要方法是用训练序列实现系统的整数倍频偏同步和信道估计,同时用训练序列中的数据构成PTS算法的加权系数,以降低峰均比。仿真结果表明,该系统能用同一训练序列同时实现系统同步、信道估计和降低峰均比,与独立实现各功能相比,该算法不仅能够同时实现以上三种功能,而且由于利用一组训练序列,节省了资源,提高了系统的有效性。
Aiming at orthogonal frequency division multiplexing (OFDM), an efficient joint algorithm is proposed for the high-speed wireless data communication system, that is to say, the same set of training sequences can be used to simultaneously achieve system frequency offset synchronization, channel estimation and peak-to-average ratio reduction. The main method is to use the training sequence to achieve the system integer multiple frequency offset synchronization and channel estimation, while using the training sequence of data constitute the PTS algorithm weighting coefficients to reduce the peak-to-average ratio. The simulation results show that the system can simultaneously achieve the system synchronization, channel estimation and peak-to-average reduction with the same training sequence. Compared with the independent realization of each function, the system can not only achieve the above three functions simultaneously, but also utilize a set of training sequences , Save resources and improve the system’s effectiveness.