A low complexity peak-to-average power ratio reduction scheme based on selected mapping and radix-II IFFT in OFDM systems
| Autor: | Mohsen Kazemian, Pooria Varahram, Shaiful Jahari Hashim, Ronan Farrell, Borhanuddin Mohd Ali |
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| Rok vydání: | 2017 |
| Předmět: |
Sequence
Computational complexity theory Computer science Orthogonal frequency-division multiplexing Real-time computing Fast Fourier transform Spectral density 020206 networking & telecommunications 020302 automobile design & engineering 02 engineering and technology Reduction (complexity) 0203 mechanical engineering Search algorithm 0202 electrical engineering electronic engineering information engineering Radix Electrical and Electronic Engineering Algorithm |
| Zdroj: | Telecommunication Systems. 67:21-30 |
| ISSN: | 1572-9451 1018-4864 |
| DOI: | 10.1007/s11235-017-0312-5 |
| Popis: | Because of its lack of feedback process and the simplicity of its searching algorithm, conventional selected mapping (CSLM) is an efficient peak-to-average power ratio (PAPR) reduction technique in orthogonal frequency division multiplexing systems compared to the present techniques such as partial transmit sequence and active constellation extension. The requirement for large numbers of inverse fast Fourier transform (IFFT) blocks to provide desired PAPR reduction performance is introduced as the most significant drawback of the CSLM. This paper uses the special structure of an N-point radix-II IFFT in the CSLM and proposes a low complexity method to reduce the redundant calculations with almost the same PAPR reduction, bit-error rate, and power spectral density performances as those of the CSLM. The simulation results show that the computational complexity is reduced by at least 46.8% compared to that of the CSLM with approximately the same PAPR performance. |
| Databáze: | OpenAIRE |
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