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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 using SLM with M-QAM 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. Email Id: rasool.sk1@gmail.com1, prof.kollakrishnamuthy@gmail.com2
Online First: December 19, 2017
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Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is an efficient method of data transmission. It is a base for high speed communication systems. The main drawback of OFDM system is that it suffers from high Peak-to- Average Power Ratio (PAPR). Due to high PAPR there is inefficient use of high power amplifier and this could limit transmission efficiency.  OFDM  consist  of  large  number  of  independent  subcarriers,  as  a  result  of  which  the amplitude of such a signal can have high peak values. In this paper, we introduce a modified SLM technique to reduce PAPR. The simulation results show PAPR can be reduced by applying the proposed scheme. The complexity is also reduced in proposed scheme. The PAPR of original OFDM is near about 10db in my base paper and it reduces it to 6.6db using SLM. And by using the modified SLM technique PAPR is reduced nearly about 3.2dB in comparison to base paper.

Keyword : OFDM, SLM, PAPR, CCDF, QAM.

  Submitted
Dec 19, 2017
Published
Dec 19, 2017
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