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正交频分复用(OFDM)系统的主要缺点是峰均功率比(PAPR)增大会严重地降低了发射机中高功率放大器(HPA)的效率。部分传输序列(PTS)算法能有效地降低OFDM信号的PAPR概率,但随着PTS中分割子块的增多也带来了高的计算复杂度。为此,文中提出一种新的PTS算法,该算法比传统的穷尽搜寻法具有更佳的性能。仿真结果表明,文中所提PTS算法在降低PAPR相似的情况下,具有更小的计算复杂度。
A major disadvantage of an Orthogonal Frequency Division Multiplexing (OFDM) system is that an increase in PAPR can seriously degrade the efficiency of a high-power amplifier (HPA) in a transmitter. Partial transmission sequence (PTS) algorithm can effectively reduce the PAPR probability of OFDM signal, but with the increase of partitioned sub-blocks in PTS also brings a high computational complexity. Therefore, a new PTS algorithm is proposed in this paper, which has better performance than the traditional exhaustive search method. The simulation results show that the proposed PTS algorithm has less computational complexity under the condition of reducing the PAPR similarity.