International Journal of Microwave Engineering and Technology
OFDM Systems with Reduced PAPR
Abstract
To reduce peak to average power radio (PAPR) of orthogonal frequency division multiplexing (OFDM) system, flexible and distortion less methods like SLM (Selected mapping) and PTS (Partial transmit sequences) are very useful. The variation of OFDM signal amplitudes is very wide with high PAPR. Huge PAPR necessitates a DAC with sufficient dynamic range to handle the OFDM signals' large peaks. PAPR reduction has been demonstrated to save considerable amounts of energy, with the net power savings being directly proportional to the desired average output power and heavily reliant on the clipping probability level. Here, we concentrate on two recently proposed flexible and distortion less methods for the reduction of the PAR by way of introducing little redundancy. There are two approaches available. A comparison is made between SLM and PTS. The transmitter in SLM selects one favorable transmit signal from a set of suitably varied signals that all represent the same data. In PTS, the transmitter creates a low PAR transmit signal by coordinating the addition of phase rotated signal segments in the proper order. Simulation results are used to compare the schemes in terms of system complexity and redundancy of transmit signals.References (5)
- Li Y., Zhou X., Guan J., “An improved Algorithm for PAPR Reduction of OFDM Systems”, Advanced Research on Computer Education, Simulation and Modeling (CESM), Springer, Volume 175, Year 2011.
- Rajesh S. Bansode, Dr. B.K Mishra & Aqsa Temrikar, “Design, Simulation & Performance Evaluation of OFDM System to Reduce PAPR using SLM & LCM with FPGA”, Global Journal of Researches in Engineering Electrical and Electronics Engineering Volume 13 Issue 15 Version 1.0 Year 2013.
- Kusum Lata and Shilpa Jaswal, “Analysis of Selective Mapping PAPR Reduction Technique in OFDM System”, International Journal of Advanced Research in Computer Engineering & Technology (IJARCET) Volume 4 Issue 5, May 2015.
- Prasad, S., Jayabalan, R., “ PAPR Reduction in OFDM Systems Using Modified SLM with Different Phase Sequences”, Wireless Pers Commun 110, 913–929 (2020). https://doi.org/10.1007/s11277-019-06763-7
- Anil Singh Rathore and Neelam Srivastava, “Analysis of Selective Mapping and Partial Transmit Sequence for PAPR Reduction”, Journal of Telecommunications, Volume 5, issue 1, October 2010.