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Title: PAPR Reduction of OFDM/OQAM System using Adaptive Clipping with Novel Step Size Based Active Constellation Extension
Authors: Vangala, S
Anuradha, S
Keywords: PAPR;AC;ACE
Issue Date: Dec-2017
Publisher: NISCAIR-CSIR, India
Abstract: The Active Constellation Extension (ACE) based on clipping technique is a lossless, simple and attractive Peak-to-Average Power Ratio (PAPR) reduction technique. But, when the target clipping level is set below an unknown initial optimum value, we observe it cannot achieve the minimum PAPR reduction. To overcome the shortcoming of low clipping ratio problem, a novel ACE algorithm with adaptive clipping control is proposed in this paper. First, an adaptive strategy is used to control the size of clipping level ‘A’. Secondly, a novel step factor μ considering the possible overlap is adopted, to complete iterative computations in order to increase the convergence speed. Simulation results verify that the modified algorithm has reduced the PAPR and improved the convergence speed significantly without side information and without any extra processing at the receiver end.
Page(s): 771-775
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Appears in Collections:JSIR Vol.76(12) [December 2017]

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