基于同一训练序列的OFDM系统联合高效算法的研究

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。

Research on Efficient Joint Algorithm of OFDM Systems with One Training Sequence

Based on the key technology of a high-speed and wireless communication system -- Orthogonal Frequency Division Multiplexing, an efficient joint algorithm was proposed. The method can realize OFDM system synchronization, channel estimation and the lower peak-to-average ratio using one training sequence. The main method is to achieve synchronization and channel estimation with training sequences, and to lower the peak-to-average ratio with the coefficients of PTS algorithm. The results of simulation show that the system can realize synchronization, channel estimation and the lower peak-to-average ratio simultaneously. Comparing with realizing each function separately, the algorithm can not only realize all the functions above, but also save some resources and improve the validity of the system by using one training sequence.