Journal of Satellite, Information and Communications (한국위성정보통신학회논문지)
- Volume 7 Issue 3
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- Pages.26-29
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- 2012
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- 2384-3853(pISSN)
Access timing offsets-resilient SC-FDMA
접속동기 오차에 강한 SC-FDMA 기법
- Received : 2012.10.30
- Accepted : 2012.12.03
- Published : 2012.12.31
Abstract
In this paper, we propose a Single Carrier Frequency Division Multiple Access(SC-FDMA) scheme with greatly enhanced tolerance of timing offset among the users. The type of the proposed scheme is similar to code spread Multiple Carrier Direct Spread Code Division Multiple Access(MC DS CDMA). The proposed scheme performs partial Discrete Fourier Transform(DFT) in order to solve high Peak to Average Power Ratio(PAPR) of the MC DS CDMA before Inverse Fast Fourier Transform(IFFT). Exploiting the property Properly Scrambled Walsh-Hadamard(PSW) code has zero correlation despite
본 논문에서는 상향링크에서 낮은 PAPR(Peak to Average Power Ratio)을 가지면서 사용자 간 동기 오차 범위를 크게 확장한 MCDS CDMA(Multiple Carrier Direct Spread Code Division Multiple Acceess) 형태의 SC-FDMA(Single Carrier Frequency Division Multiple Access) 기법을 제안한다. 제안하는 기법은 상향링크 준동기 환경에 강한 특성을 가진 MC DS CDMA 기법의 높은 PAPR을 갖는 단점을 보완하기 위해 부분 IFFT(Inverse Fast Fourier Transform) 연산 이전에 부분 DFT(Discrete Fourier Transform)연산을 수행한다. 제안하는 기법은