微型机与应用2017，Vol.36Issue(8)：60-62,66,4.DOI:10.19358/j.issn.1674-7720.2017.08.019
防止OFDM天线放大器峰值削波的AMAPR帧加权方法
Using AMAPR frame weighting method to achieve linear output for power of OFDM antenna amplifier
范晓晶 1张珅2
作者信息
- 1. 合肥工业大学 工程训练中心,安徽 合肥 230601
- 2. 华为软件技术有限公司,江苏 南京 21001
- 折叠
摘要
Abstract
The number of subcarriers for OFDM system causes large dynamic signal range and a very high PAPR (peak-to-average power ratio), which often causes nonlinear distortion of antenna amplifier and peak clipping and increases the bit error rate of the system.A more advanced algorithm for this issue is to use the peak factor PAR (peak-to-average ratio) as weight to reduce the PAPR, but the algorithm makes the input signal significantly attenuated, the signal to noise ratio decreased rapidly, and bit error rate increased.Based on the above problems, a new algorithm is proposed that is to use AMAPR (peak signal and antenna amplifier maximum ratio) to calculate weight of each frame.Only when the max power of input signal is greater than a maximum frame of power amplifier of the linear interval, then the linear compensation method is realized frame by frame.Calculation of the weighted coefficient will improve the signal to noise ratio as much as possible.Through simulation, the AMAPR frame weighting algorithm is proved that it can prevent peak clipping, improve the BER performance, and prevent signal attenuation.The new algorithm realizes the low cost antenna amplifier linear compensation.关键词
信号峰值与天线放大器线性极大值比/正交频分复用多载波调制/线性补偿/峰值削波Key words
AMAPR/OFDM/linear compensation/peak clipping分类
信息技术与安全科学引用本文复制引用
范晓晶,张珅..防止OFDM天线放大器峰值削波的AMAPR帧加权方法[J].微型机与应用,2017,36(8):60-62,66,4.
