降低OFDM系统峰均比的压扩算法  

Research on Companding Transforms for PAPR Reduction in OFDM Systems

作　　者：马洪军[1] 郭志强[1] 王巨先[1] 康乐峰[1] 邢欣[1] 

机构地区：[1]北方自动控制技术研究所,太原030006

出　　处：《火力与指挥控制》2013年第11期104-106,110,共4页Fire Control & Command Control

摘　　要：首先对指数压扩函数进行化简,然后提出了一种新的降低正交频分复用(OFDM)系统峰均比的非线性压扩方案。该方案在保持信号压扩前后平均功率不变的前提下,可根据实际工程中对峰均比(PAPR)和误比特率(BER)性能的需要调整其参数。计算机仿真表明,与另外3种方案相比,新的压扩算法能有效地降低峰均比,并且保持较低的误比特率。In this paper,firstly the formula of the exponential companding schemes,is simplified propose a new nonlinear Companding is proposed transform to reduce the Peak-to-Average Power Ratio （PAPR） of Orthogonal Frequency Division Multiplexing （OFDM）. The proposed companding transform can always keep the average power unchanged, in addition, its parameter is adjustable to meet kinds of project demands on PAPR reduction and Bit Error Rate（BER） performance. Computer simulation shows that it can effectively reduce the PAPR and keep lower BER compared with three other schemes.

关 键 词：正交频分复用(OFDM) 峰均比 误比特率 自适应高斯-洛巴托求积 多项式曲线拟合 

分 类 号：E923.1[军事—军事装备学]