A Weighted OFDM Signal Scheme for Peak-to-Average Power Ratio Reduction of OFDM Signals

2013 ◽  
Vol 62 (3) ◽  
pp. 1406-1409 ◽  
Author(s):  
Chang Eon Shin ◽  
Kyung Soo Rim ◽  
Youngok Kim
Keyword(s):  
Average Power ◽  
Power Ratio ◽  
Ofdm Signal ◽  
Power Ratio Reduction ◽  
Ofdm Signals ◽  
Ratio Reduction

The Research of Companding Transform for Peak-to-Average Power Ratio Reduction of OFDM Signals

2011 ◽  
Vol 128-129 ◽  
pp. 1484-1488
Author(s):  
Xiu Yan Zhang ◽  
Wei Dong Wang ◽  
Lei Lei Pei ◽  
Yu Bo Duan
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Average Power ◽  
Original System ◽  
Power Ratio ◽  
Transform Method ◽  
Ofdm Signal ◽  
Power Ratio Reduction ◽  
Papr Performance ◽  
Ofdm Signals ◽  
Ratio Reduction

One of the main drawbacks of orthogonal frequency division multiplexing (OFDM) is the high peak-to-average power ratio (PAPR) of the OFDM signal. How to reduce the PAPR is the key to applying the technology of OFDM efficiently. In this paper, companding transform method is presented. The performance of the systerm BER is analysised, then PAPR is reduced by using the method through simulation. Simulation results have shown that the proposed methods are very effective and flexible to improve PAPR performance in the OFDM based on the performance of the system BER is not changed very much compare to the original system.

scholarly journals A novel generalized oppositional biogeography-based optimization algorithm: application to peak to average power ratio reduction in OFDM systems

2016 ◽  
Vol 14 (1) ◽  
pp. 705-722 ◽  
Author(s):  
Sotirios K. Goudos
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Average Power ◽  
Papr Reduction ◽  
Power Ratio ◽  
Ofdm Systems ◽  
Major Drawback ◽  
A New Technique ◽  
Power Ratio Reduction ◽  
Ofdm Signals ◽  
Ratio Reduction

AbstractA major drawback of orthogonal frequency division multiplexing (OFDM) signals is the high value of peak to average power ratio (PAPR). Partial transmit sequences (PTS) is a popular PAPR reduction method with good PAPR reduction performance, but its search complexity is high. In this paper, in order to reduce PTS search complexity we propose a new technique based on biogeography-based optimization (BBO). More specifically, we present a new Generalized Oppositional Biogeography Based Optimization (GOBBO) algorithm which is enhanced with Oppositional Based Learning (OBL) techniques. We apply both the original BBO and the new Generalized Oppositional BBO (GOBBO) to the PTS problem. The GOBBO-PTS method is compared with other PTS schemes for PAPR reduction found in the literature. The simulation results show that GOBBO and BBO are in general highly efficient in producing significant PAPR reduction and reducing the PTS search complexity.

scholarly journals Transform Methods for the Reduction of the Peak to Average Power Ratio for the OFDM Signal

2017 ◽  
Vol 2017 ◽  
pp. 1-17
Author(s):  
Rajendra Kumar ◽  
Vuttipol Santitewagul
Keyword(s):  
Average Power ◽  
Bandwidth Efficiency ◽  
Power Ratio ◽  
Ofdm System ◽  
Single Carrier ◽  
Ofdm Signal ◽  
Qam Modulation ◽  
Computational Requirement ◽  
Power Ratio Reduction ◽  
Ratio Reduction

The paper presents multitransform OFDM-OP system for an effective PAPR (peak to average power ratio) reduction that has a reasonable computational requirement, does not introduce any distortion, needs relatively insignificant decrease in the bandwidth efficiency, and provides a PAPR very close to that for the single carrier modulation systems thus effectively eliminating any PAPR penalty incurred by the multicarrier OFDM system. The PAPR system consists of a bank of multiple orthonormal transforms and a minimum PAPR evaluation unit for finding the optimum transform index. The paper also presents a hybrid OFDM-OP-DSI system comprised of the multiple transforms and a novel dummy symbol insertion. The PAPR reduction performance of the presented systems is compared with those of the various other transform techniques of the literature. Various simulations on the presented systems show that these can achieve a PAPR that is very close to that of a single carrier system for QAM modulation with the order of modulation selected to be 16, 64, and 256.

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