On peak to average power ratio of universal filtered OFDM signals

The orthogonal frequency division multiplexing (OFDM) modulation technique is one of the key strategies for multiuser signal transmission especially in smart grids and wind farms. This paper introduces an approach for peak-to-average power ratio (PAPR) reduction of such signals based on novel global harmony search (NGHS) and partial transmit sequence (PTS) schemes. In PTS technique, the data block to be transmitted is partitioned into disjoint subblocks, which are combined using phase factors to minimize PAPR. The PTS requires an exhaustive search over all combinations of allowed phase factors. Therefore, with respect to the fast implementation and simplicity of NGHS technique, we could achieve significant reduction of PAPR.

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

Open Mathematics ◽

10.1515/math-2016-0066 ◽

2016 ◽

Vol 14 (1) ◽

pp. 705-722 ◽

Cited By ~ 4

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.

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The Advanced Peak Cancellation Implement Method for OFDM Signals in CMMB

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.380-384.3538 ◽

2013 ◽

Vol 380-384 ◽

pp. 3538-3541

Author(s):

Qian Hui Liu ◽

Jian Wang

Keyword(s):

Low Power ◽

Power Amplifier ◽

Power Efficiency ◽

Average Power ◽

Reduction Technique ◽

High Peak ◽

Papr Reduction ◽

Power Ratio ◽

Comparative Performance ◽

Ofdm Signals

High peak-to-average power ratio (PAPR) is one of the main disadvantages for OFDM signals, which will always result in low power efficiency of power amplifier. The peak cancellation method is a powerful PAPR reduction technique. In this paper, the advanced peak cancellation implement method (APC) is proposed for OFDM signals. Extensive simulations demonstrate that in comparison with the conversational peak cancellation implement method, the APC is more suitable for OFDM signals due to less iteration and comparative performance.

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