Science Journal of Electrical & Electronic Engineering

April 2015, Volume 2015, ISSN:2276-6340

Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License.

Short Communication

 

A Modified Pre-Coding Technology for PAPR Reduction in V-OFDMsystem

Author: 1Bin Lei, 2Honggui Deng, 3Yu Jiang

Department of Computer Sciences, University of Lagos, Nigeria.

Accepted 7 March, 2015; Available Online 14 April, 2015

doi: 10.7237/sjeee/291

Abstract:

The Vector Orthogonal Frequency Division Multiplexing (VOFDM) system is a generalized version of the conventional Orthogonal Frequency Division Multiplexing (OFDM) system,and also hasthe disadvantage of highin the peak-to-average power ratio (PAPR). However, most technologies used in OFDM cannot be appliedto a V-OFDM system directlybecause of existingdifference between the OFDM and V-OFDM systems.After further research on the characteristics of V-OFDM system, a modifying pre-coding technology is proposed for PAPR reduction in VOFDM system, where power of each vector block (VB) is assigned to VOFDMblock for PAPR reduction.The simulation results show that the modified pre-coding technologycanreduce PAPR more effectivelyand has a 1 dB gain on signal noise ratio (SNR) when the bit error rate(BER) reached 10-3 in the case ofM = 4 (M represents thelengthof VBs) in VOFDM system.So the modified pre-coding technology isan attractive solution to the high PAPR of V-OFDM system.

Keyword:Vector Orthogonal Frequency Division Multiplexing (VOFDM); modified pre-coding technology; PAPR

 

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