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Current Trends in Science and Technology

an Open Access Publication ISSN: 0976-9730 | 0976-9498

Engineering and Technology

PAPR Reduction in OFDM Systems by a Modified Genetic Algorithm PTS Technique

Mr.Shaik. Rasool Saheb, Dr.K.Krishna Murthy
1Asst. Professor in H&S Dept. TKREC, Hyderabad 2Dept. of Electronics, PG Center, P.B. Siddartha Arts & Science College, Vijayawada, AP, India. E-mail Id: prof.kollakrishnamuthy@gmail.com1 , rasool.sk1@gmail.com2
Online First: December 19, 2017
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Abstract

In this paper, we propose a peak-to-average power ratio (PAPR) reduction method for an orthogonal frequency division multiplexing (OFDM) system by  combining the  im- proved genetic algorithm used the partheno-crossover operator (PCGA) with partial transmit sequence (PTS) scheme, called PCGA-PTS. Recently, the genetic algorithm based PTS scheme (GA-PTS)  is  a  novel  PAPR  reduction  method,  which  has lower  computational load  than  the  PTS  technique  and  is  a suboptimal PAPR reduction method. However, how to further improve the PAPR performance of GA-PTS in OFDM systems is still an active research. Therefore, this paper proposes a new PAPR reduction method to improve the PAPR performance of GA-PTS, based on the same computational complexity. Our proposed method uses a two-step crossover operator and a mutation operator to generate the offspring, and then selects the proper candidates from the offspring to be the individuals of new population, where the two-step crossover operator is composed of a crossover operator and a partheno-crossover operator. In simulation results, our proposed method has better PAPR performance than the GA-PTS technique in OFDM systems.


 

  Submitted
Dec 19, 2017
Published
Dec 19, 2017
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