Performance of SDM/COFDM system in the presence of nonlinear power amplifier

被引：0
作者：
Mona Shokair
Hefdhallah Sakran
机构：
[1] El-Menoufia University,Faculty of Electronic Engineering
[2] Ibb University,Department of Electronics, Faculty of Engineering
来源：
Telecommunication Systems | 2012年 / 50卷
关键词：
OFDM; Peak to Average Power Ratio; Space Division Multiplexing (SDM); High Power Amplifier; μ-law compander;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The performance of Space Division Multiplexing/ Companded Orthogonal Frequency Division Multiplexing (SDM/COFDM) system will be evaluated in the presence of nonlinear amplifier. The evaluation comes from decreasing high dynamic range that is resulted from characteristics of OFDM and nonlinearity of power amplifier. The high dynamic range means high Peak to Average Power Ratio (PAPR). The reduction of dynamic range or PAPR is made by using a compander in this system, which is effective that is because of Gaussian distribution of OFDM signal where large OFDM signal only occurs infrequently. System simulation models are employed using Rapp’s nonlinear power amplification model. The simulation results show that the compander can provide better performance in comparison to a system that does not employ the compander, i.e., SDM/OFDM system. The effect of main parameter for the compander will be studied. Comparisons between the performances of our system and SDM/OFDM system that is used clipping technique for reduction of PAPR will be made. All these results are made at different modulation techniques and different sub-carriers
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页码：89 / 95
页数：6
相关论文
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