Sliding the SLM-technique to Reduce the Non-Linear Distortion in OFDM Systems

Authors

  • M. A. Taher Dept. of Electrical, Electronics and System Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor D.E., MALAYSIA
  • M. J. Singh Dept. of Electrical, Electronics and System Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor D.E., MALAYSIA
  • M. B. Ismail Dept. of Electrical, Electronics and System Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor D.E., MALAYSIA
  • S. A. Samad Dept. of Electrical, Electronics and System Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor D.E., MALAYSIA
  • M. T. Islam Dept. of Electrical, Electronics and System Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor D.E., MALAYSIA

DOI:

https://doi.org/10.5755/j01.eee.19.5.2075

Keywords:

OFDM, peak to average power ratio, selected mapping, complexity

Abstract

In this paper, a novel technique that can be effectively used to reduce the peak-to-average power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) system is proposed. The proposed technique, called sliding selected mapping (SSLM), is considered a modified version of the conventional selected mapping (CSLM) scheme. SSLM uses a window with a predefined size of less than N, which carries the phase rotation vector (PRV). In contrast to the CSLM, SSLM uses length-f·N PRVs (0<f<1). The window is shifted by a step size (sliding) on the data sequence. At each shift, the modified data sequence undergoes IFFT operations to check the PAPR, similar to the CSLM. Thereafter, the shift index that corresponds to the minimum PAPR is chosen as the side information. Meanwhile, for comparison, the CSLM uses the PRV index as side information. Simulation results and mathematical computations show that our proposed technique requires less computational complexity. In addition, the corresponding amount of side information is significantly reduced compared with that of CSLM.

DOI: http://dx.doi.org/10.5755/j01.eee.19.5.2075

Downloads

Published

2013-05-01

How to Cite

Taher, M. A., Singh, M. J., Ismail, M. B., Samad, S. A., & Islam, M. T. (2013). Sliding the SLM-technique to Reduce the Non-Linear Distortion in OFDM Systems. Elektronika Ir Elektrotechnika, 19(5), 103-111. https://doi.org/10.5755/j01.eee.19.5.2075

Issue

Vol. 19 No. 5 (2013)

Section

TELECOMMUNICATIONS ENGINEERING

License

The copyright for the paper in this journal is retained by the author(s) with the first publication right granted to the journal. The authors agree to the Creative Commons Attribution 4.0 (CC BY 4.0) agreement under which the paper in the Journal is licensed.

By virtue of their appearance in this open access journal, papers are free to use with proper attribution in educational and other non-commercial settings with an acknowledgement of the initial publication in the journal.