电力系统自动化Issue(10)：66-70,5.DOI:10.7500/AEPS20130707001
一种降低电力线正交频分复用系统峰均比的方法
A Method for PAPR Reduction of OFDM System in Power Line Communication Channels
肖丽萍 1梁燕1
作者信息
- 1. 燕山大学信息科学与工程学院，河北省秦皇岛市 066004
- 折叠
摘要
Abstract
The drawbacks of the conventional selective mapping (SLM) method for peak to average power ratio (PAPR) reduction in an orthogonal frequency division multiplexing (OFDM) system are the loss in data rate transmission caused by transmitting side information and the high computational complexity.This paper proposes an improved SLM method without side information,which has the advantages of high bandwidth efficiency and low complexity.In the method,quaternary data is mapped onto ring circles first,and then finishes the serial-to-parallel conversion,sub-blocks division and phase factor rotation, when an original constellation point is mapped to multiple points with no coincidence on the ring circle.After inverse fast Fourier transform (IFFT) operations,one sub-block is cyclically shifted and recombined with another one,so more candidate signals are generated.The lowest PAPR signal can be selected for transmission finally.Thus,the method can further reduce the appearing probability of high PAPR.Computer simulation results show that the proposed scheme achieves excellent performance in terms of reduction both in PAPR and symbol error rate at the power line communication channel.关键词
电力线通信/正交频分复用/峰均比/边带信息/选择性映射/误符号率Key words
power line communication/orthogonal frequency division multiplexing (OFDM)/peak to average power ratio (PAPR)/side information/selective mapping (SLM)/symbol error rate引用本文复制引用
肖丽萍,梁燕..一种降低电力线正交频分复用系统峰均比的方法[J].电力系统自动化,2014,(10):66-70,5.
