• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Optimal Design of Piecewise Linear Companding Transforms for PAPR Reduction in OFDM Systems

Vol. 10, No.1, January 31, 2016
10.3837/tiis.2016.01.012, Download Paper (Free):

Abstract

Orthogonal frequency division multiplexing (OFDM) signals suffer from the problem of large peak-to-average power ratio (PAPR) which complicates the design of the analog front- end of the system. Companding is a well-known PAPR reduction technique that reduces the PAPR by transforming the signal amplitude using a deterministic function. In this paper, a novel piecewise linear companding transform is proposed. The design criteria for the proposed transform is developed by investigating the relationships between the compander and decompander's profile and parameters with the system's performance metrics. Using analysis and simulations, we relate the companding parameters with the bit error rate (BER), out-of-band interference (OBI), amount of companding noise, computational complexity and average power. Based on a set of criteria developed thereof, we formulate the design of the proposed transform. The main aim is to preserve the signal’s attributes as much as possible for a predetermined amount of PAPR reduction. Simulations are carried out to evaluate and compare the proposed scheme with the existing companding transforms to demonstrate the enhancement in PAPR, BER and OBI performances.


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Cite this article

[IEEE Style]
Sana Mazahir and Shahzad Amin Sheikh, "Optimal Design of Piecewise Linear Companding Transforms for PAPR Reduction in OFDM Systems," KSII Transactions on Internet and Information Systems, vol. 10, no. 1, pp. 200-220, 2016. DOI: 10.3837/tiis.2016.01.012

[ACM Style]
Mazahir, S. and Sheikh, S. A. 2016. Optimal Design of Piecewise Linear Companding Transforms for PAPR Reduction in OFDM Systems. KSII Transactions on Internet and Information Systems, 10, 1, (2016), 200-220. DOI: 10.3837/tiis.2016.01.012