Peak to Average Power Ratio Reduction in OFDM Systems Using Clipping and Filtering Technique
Begared Salih Hassen
Begared Salih Hassen, Electronic Technique Department Institute of Technology, Baghdad, Iraq.
Manuscript received on March 02, 2014. | Revised Manuscript received on March 03, 2014. | Manuscript published on March 05, 2014. | PP: 155-158 | Volume-4 Issue-1, March 2014. | Retrieval Number: A2109034114/2014©BEIESP
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Abstract: Orthogonal Frequency Division Multiplexing (OFDM) has been currently under intense research for broadband wireless transmission due to its robustness against multipath fading. However OFDM signals have a problem with high Peak-to-Average power ratio (PAPR) and thus, a power amplifier must be carefully manufactured to have a linear input-output characteristic or to have a large input power back-off. The drawbacks of high peak to average power ratio (PAPR) can outweigh all the potential benefits of Orthogonal Frequency Division Multiplexing (OFDM) signals. In this Paper, a sophisticated PAPR reduction technique, named Iterative Clipping and filtering (ICF) is proposed for OFDM system. By considering the example of OFDM, with Quadrature Phase-Shift Keying (QPSK) mapping, simulation results under Matlab environment show that the proposed method performs well in reducing PAPR.
Keywords: OFDM, High Peak to Average Power Ratio, Iterative Clipping and Filtering.