一种降低OFDM信号PAPR的改进PTS方法  

A kind of reducing PAPR of OFDM signal using improved PTS method

作　　者：曾庆芳[1] 何选森[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《计算机工程与应用》2012年第7期154-157,共4页Computer Engineering and Applications

摘　　要：部分传输序列(PTS)方法通过选择合适的相位序列以降低信号峰值出现的概率,该方法不会使信号发生畸变。但是传统的PTS技术计算复杂度非常大,需遍历所有可选的相位因子,其计算量随分割子序列数按指数增长。提出了一种正倒二叉树多层相位序列方法,该方法通过对称的树形搜索,搜索出最优的相位序列。仿真结果表明,该方法大大降低系统的复杂度,同时PA-PR得到更好的抑制。By choosing the appropriate phase sequence, Partial Transmit Sequence（PTS）method reduces the probability of the signal peak, this method does not make the signal distortion. But conventional PTS technique has very large computational complexity, needs to traverse all the optional phase factor, its calculation sequence increases with the number of separate exponential growth. In this paper, a multi-phase sequence method is proposed, which is inverted binary tree. By symmetrical tree searching, this method searches out the optimal phase sequence. Simulation results show that the method reduces the system complexity, while the PAPR has been better suppressed.

关 键 词：正交频分复用 峰均比 部分传输序列 累加分布函数 

分 类 号：TN911[电子电信—通信与信息系统]