An Energy Efficient Smart Crest Factor Reduction Scheme in Non-Contiguous Carrier Aggregated Signals

Dongwan KIM  Kyung-Jae LEE  Daehee KIM  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E102-A   No.3   pp.604-607
Publication Date: 2019/03/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E102.A.604
Type of Manuscript: LETTER
Category: Mobile Information Network and Personal Communications
Keyword: 
peak to average power ratio (PAR),  smart schedule,  energy efficiency (EE),  spectrum efficiency (SE),  

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Summary: 
One of essential requirements for the next generation communications is to support higher spectral efficiency (SE) and energy efficiency (EE) than the existing communication system. For increasing the SE, carrier aggregation (CA) has received great attention. In this paper, we propose an energy efficient smart crest factor reduction (E2S-CFR) method for increasing the EE while satisfying the required SE when the CA is applied. The proposed E2S-CFR exploits different weights on each carrier according to the required error vector magnitude (EVM), and efficiently reduces the peak to average power ratio (PAR). Consequently, we can reduce the bias voltage of a power amplifier, and it leads to save total consumed energy. Through performance evaluation, we demonstrate that the proposed E2S-CFR improves the EE by 11.76% compared to the existing schemes.