PAPR Reduction in OFDM using SQRT and Mu-Law Companding Techniques

  V.Tejaswini,  K.Upendra Chowdary

Orthogonal Frequency Division Multiplexing (OFDM) is considered to be a promising technique against the multipath fading channel for wireless communications. OFDM is well known Technique for transmitting large data Over Radio waves. It has several advantages such as high number of orthogonal sub-carriers, no Inter-Symbol Interference, high spectral efficiency, tolerance in multipath delay spread, power efficiency, frequency selective fading immunity etc. Its main disadvantage is PAPR (Peak to Average Power Ratio) nothing but several sinusoidal leads that are a major drawback of multicarrier transmission system which leads to power inefficiency in RF section of the transmitter. These high peaks produce signal excursions into non-linear region of operation of the Power Amplifier (PA) at the transmitter, thereby leading to non-linear distortions and spectral spreading. In fact, PAPR in OFDM system is the most detrimental aspect which degrades power and spectral spreading. This paper presents Reduction of PAPR using mu-law and square root companding techniques. These Proposed techniques show better performance for reduction in PAPR.

Keywords- Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio (PAPR), Bit Error Rate (BER) Square Root Companding Technique (SQRT), mu-law

Unique Identification Number - IJEDR1703003
Page Number(s) - 17-22
Pubished in - Volume 5 | Issue 3 | July 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  V.Tejaswini,  K.Upendra Chowdary,   "PAPR Reduction in OFDM using SQRT and Mu-Law Companding Techniques", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 3, pp.17-22, July 2017, Available at :http://www.ijedr.org/papers/IJEDR1703003.pdf