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Modified Dummy Sequence Insertion Method for PAPR Reduction of OFDM Signal
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- Authors
- Jae-Kwon Lee, Jeong-Sang Park, Jin-Up Kim
- Issue Date
- 2007-09
- Citation
- Vehicular Technology Conference (VTC) 2007 (Fall), pp.1265-1268
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- One of the major drawbacks of the OFDM system is a large peak to average power ratio. This leads to performance degradation due to nonlinear distortion in the high power amplifier. In this paper, we propose a modified dummy sequence insertion (m-DSI) method whereby low complexity and high PAPR reduction can be realized in OFDM system. The m-DSI method designs the sequence that achieves low covariance value with other sequences. After IFFT operation, the m-DSI sequence with the lowest PAPR is selected for transmission. Also, in order to reduce the IFFT complexity, the N-point IFFT block is divided into two sub-IFFT blocks due to avoiding the repeated calculation of IFFT operation. Simulation results of the m-DSI method in comparison with the DSI method are presented. The results demonstrate that the m-DSI method yields superior PAPR performance and lower IFFT complexity than the DSI method with almost the same BER performance while utilizing the same number of dummy bits. © 2007 IEEE.
- KSP Keywords
- BER performance, Dummy sequence insertion(DSI), High PAPR, Insertion method, Low complexity, Nonlinear Distortion, OFDM signals, OFDM systems, PAPR Reduction, Peak to average Power ratio(PAPR), high power amplifier