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PAPR Analysis of the OFDMA and SC-FDMA in the Uplink of a Mobile Communication System
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- 저자
- 이영선, 이일진, 김장수, 유흥균
- 발행일
- 200903
- 출처
- Journal of the Korean Institute of Electromagnetic Engineering and Science, v.9 no.1, pp.17-24
- ISSN
- 1598-2556
- 출판사
- 한국전자파학회 (KIEES)
- 초록
- In recent years, OFDMA(orthogonal frequency division multiple access) and SC-FDMA(Single Carrier Frequency Division Multiple Access) have been widely studied for the uplink of a mobile communication system. In this paper, PAPR(Peak-to-Average Power Ratio) and BER(Bit Error Rate) performance of the OFDMA and SC-FDMA systems are studied in relation to the uplink of a mobile communication system. Three kinds of sub-carrier allocation methods in the OFDMA system and 2 kinds of sub-carrier allocation methods in SC-FDMA system are suggested to compare and improve system performance. Simulation results show that in the OFDMA system, the first sub-band allocation method has better PAPR reduction performance than the other methods. In the SC-FDMA system, the distributed allocation method offers similar PAPR, compared with the sub-band allocation method. PAPR can be further reduced by adding a spectrum shaping filter with an appropriate roll of factor. Furthermore, it is found that on average, SC-FDMA can reduce the PAPR by more than 5 dB compared to OFDMA, when the total sub-carrier number is 1,024 and the sub-carrier number allocated to each user changes from 8 to 512. Because of the frequency diversity and low PAPR characteristics, SC-FDMA system of the distributed sub-carrier allocation method can achieve better BER performance than the OFDMA system.
- KSP 제안 키워드
- Allocation method, BER performance, Bit Error Rate(And BER), Frequency division multiple access(FDMA), Low PAPR, Orthogonal Frequency Division Multiple Access(OFDMA), PAPR Reduction, Peak-to-Average-Power-Ratio(PAPR), Reduction performance, Roll of factor, Shaping filter