Criterion for Reducing Error Rate Degradation by Nonlinear Amplifier for Multicarrier Transmission

Osamu TAKYU  Tomoaki OHTSUKI  Masao NAKAGAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.7   pp.3057-3061
Publication Date: 2005/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
multi-carrier transmission,  nonlinear distortion,  peak power problem,  

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Summary: 
One of the drawbacks of multicarrier transmission schemes is that the transmitted signals have high peak-to-average power ratio (PAPR). When PAPR of the signal is larger than the input-back off (IBO) of the high power amplifier (HPA), signal powers larger than the saturation threshold of the HPA cause the saturation events so that the error rate performance is degraded. To improve the error-rate performance degraded by the nonlinear distortion, not only the signal power above the saturation threshold but also the interval of the signals causing the saturation events at HPA should be reduced. In this paper, we propose the total exceeding power (TEP) as a new criterion for improving the error rate performance degraded by the nonlinear amplifier for multicarrier transmission.