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Peak to average power reduction using amplitude and sign adjustment

Sharif, Masoud and Florens, Cedric and Fazel, Maryam and Hassibi, Babak (2004) Peak to average power reduction using amplitude and sign adjustment. In: IEEE International Conference on Communications, (ICC '04), Paris, France, 20-24 June 2004. Vol.2. IEEE , Piscataway, NJ, pp. 837-841. ISBN 0780385330 http://resolver.caltech.edu/CaltechAUTHORS:SHAicc04

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Abstract

In this paper, we propose a method to reduce the peak to mean envelope power ratio (PMEPR) of multicarrier signals by modifying the constellation. For MPSK constellations, we minimize the maximum of the multicarrier signal over the sign and amplitude of each subcarrier. In order to find an efficient solution to the aforementioned non-convex optimization problem, we present a suboptimal solution by first optimizing over the signs using the result of [1], and then optimizing over the amplitudes given the signs. We prove that the minimization of the maximum of a multicarrier signal over the amplitude of each subcarrier can be written as a convex optimization problem with linear matrix inequality constraints. We also generalize the idea to other constellations such as 16QAM. Simulation results show that by an average power increase of 0.21 db and not sending information over the sign of each subcarrier, PMEPR can be decreased by 5.1 db for a system with 128 subcarriers.


Item Type:Book Section
Additional Information:© 2004 IEEE. Reprinted with Permission. Publication Date: 20-24 June 2004. Posted online: 2004-07-26. This work was supported in part by the National Science Foundation under grant no. CCR-0133818, by the Office of Naval Research under grant no.N00014-02-1-0578, and by Caltech’s Lee Center for Advanced Networking.
Subject Keywords:linear matrix inequalities; minimization; phase shift keying; probability; quadrature amplitude modulation; signal processing; MPSK constellations; PMEPR; amplitude adjustment; linear matrix inequality constraints; multicarrier signals; nonconvex optimization problem; peak to mean envelope power ratio; power reduction; sign adjustment
Record Number:CaltechAUTHORS:SHAicc04
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SHAicc04
Alternative URL:http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=29119&arnumber=1312619
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9762
Collection:CaltechAUTHORS
Deposited By: Kristin Buxton
Deposited On:17 Mar 2008
Last Modified:26 Dec 2012 09:52

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