Paper Info
Title
PAPR reduction via Constellation Extension in OFDM systems using Generalized Benders Decomposition and Branch and Bound techniques
Abstract
In this paper, a novel Constellation Extension (CE) based approach is presented to address the high Peak-to-Average Power Ratio (PAPR) problem at the transmitter side, which is an important drawback of Orthogonal Frequency Division Multiplexing (OFDM) systems. This new proposal is formulated as a Mixed Integer Non-Linear Programming (MINLP) optimization problem, which employs Generalized Benders Decomposition (GBD) and Branch-and-Bound (BB) methods to determine the most adequate extension factor and the optimum set of input symbols to be extended within a proper quarter-plane of the constellation. The optimum technique based on GBD, denoted as Generalized Benders Decomposition for Constellation Extension (GBDCE), provides a bound with relevant improvement in terms of PAPR reduction compared with other CE techniques, although it may exhibit slow convergence. To avoid excessive processing time in practical systems, the sub-optimum Branch-and-Bound for Constellation Extension (BBCE) scheme is proposed. Simulation results show that BBCE achieves a significant PAPR reduction, providing a good trade-off between complexity and performance. We also show that the BBCE scheme performs satisfactorily in terms of Power Spectral Density (PSD) and Bit Error Rate (BER) in the presence of a non-linear High Power Amplifier (HPA).
Year
DOI
Venue
2016
10.1109/TVT.2015.2450178
IEEE Trans. Vehicular Technology
Keywords
Field
DocType
OFDM,branch-and-bound,constellation extension,generalized benders decomposition,peak power reduction
Convergence (routing),Branch and bound,Computer science,Nonlinear programming,Electronic engineering,Integer programming,Multiplexing,Optimization problem,Orthogonal frequency-division multiplexing,Bit error rate
Journal
Volume
Issue
ISSN
PP
99
0018-9545
Citations 
PageRank 
References 
4
0.47
20
Authors
3
Name
Order
Citations
PageRank
Martha C. Paredes Paredes1183.54
Escudero Garzas, J.240.47
M. Julia Fernández-Getino García3428.78