A closed-form expression for the total degradation in OFDM systems

被引：0
|
作者：
Rosati, Stefano [1 ]
Candreva, Enzo Alberto [2 ]
Vanelli-Coralli, Alessandro [2 ]
Corazza, Giovanni E. [2 ]
机构：
[1] Ecole Polytech Fed Lausanne, LCM, CH-1015 Lausanne, Switzerland
[2] Univ Bologna, Elect & Informat Engn Dept, Bologna, Italy
来源：
INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS AND NETWORKING | 2015年 / 33卷 / 06期
关键词：
OFDM; total degradation; nonlinear distortion; HPA; SDR; back-off; TRANSMISSION; PERFORMANCE;
D O I：
10.1002/sat.1093
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
In this paper, building upon Bussgang's theorem, we present a new expression for the total degradation (TD) in OFDM systems. This novel expression is applicable to any high power amplifier (HPA) model. In case of ideal clipping HPA model and for particular realizations of Rapp and Saleh HPA models, it and can be expressed in closed form. It enables a significant speed-up in computing TD, because it avoids end-to-end system simulations. As a consequence, it simplifies the evaluation of TD as a function of the back-off, yielding a more accurate evaluation of the optimum HPA back-off (i.e., the back-off value that minimizes TD). Numerical results show a perfect agreement between the proposed analytical framework and the Monte Carlo simulation results.Copyright (c) 2014 John Wiley & Sons, Ltd.
引用
收藏
页码：543 / 555
页数：13
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