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Research Paper | Electronics & Communication Engineering | India | Volume 3 Issue 5, May 2014

Performance of Linear Block Coded Selective Mapping scheme in Reduction of Peak to Average Power Ratio; Cubic Metric; and Block Error Rate in OFDM System

Pallavi Chandake | S.V.Sankpal

Abstract: Orthogonal Frequency Division Multiplexing (OFDM) ; is a well-known multicarrier modulation scheme. It works very efficiently in reliable data communications. Like any other technique; OFDM encounters some drawbacks; one of which is its high peak to average power ratio (PAPR). High PAPR requires a large power back off in the transmitting amplifier; which results in low power efficiency. Another metric representing the same problem is the cubic metric (CM) ; which gives a better prediction of the power capability than PAPR. In this paper; the scheme is introduced which combines selective mapping with block coding to reduce the PAPR and improve Block Error Rate (BLER) for OFDM systems. The proposed scheme is compared with the conventional selective mapping PAPR reduction method; which is well known for having a better reduction capability. The comparison is done in terms of Complementary Cumulative Distribution Function (CCDF) of the PAPR of the multicarrier signal. The simulation results show that the proposed scheme can achieve a better PAPR/CM reduction while maintaining the minimum BLER.

Keywords: Orthogonal Frequency Division Multiplexing OFDM, Peak to Average Power Ratio PAPR, Cubic Metric CM, Block Error Rate BLER, Selective Mapping, Block Coding

Edition: Volume 3 Issue 5, May 2014,

Pages: 1001 - 1005