Open AccessTHE NEW ADAPTIVE ACTIVE CONSTELLATION EXTENSION ALGORITHM FOR PAR MINIMIZATION IN OFDM SYSTEMS
Author(s) -
K. B. Pavan Kumar,
R. Srinivasa Rao
Publication year - 2014
Publication title -
international journal of electronic signal and systems
Language(s) - English
Resource type - Journals
ISSN - 2231-5969
DOI - 10.47893/ijess.2014.1183
Subject(s) - clipping (morphology) , constellation , orthogonal frequency division multiplexing , computer science , extension (predicate logic) , reduction (mathematics) , algorithm , telecommunications link , control theory (sociology) , mathematics , telecommunications , channel (broadcasting) , control (management) , artificial intelligence , philosophy , physics , linguistics , geometry , astronomy , programming language
In this paper, the Peak-to-Average Ratio reduction in OFDM systems is implemented by the Adaptive Active Constellation Extension (ACE) technique which is more simple and attractive for practical downlink implementation purpose. However, in normal constellation method we cannot achieve the minimum PAR if the target clipping level is much below than the initial optimum value. To get the better of this problem, we proposed Active Constellation Algorithm with adaptive clipping control mechanism to get minimum PAR. Simulation results exhibits that the proposed algorithm reaches the minimum PAR for most severely low clipping signals to get minimum PAR.