상세정보
학술대회
Space-time codes over PN sequences for DS/CDMA systems
- 발행일
- 200403
- 출처
- Wireless Communications and Networking Conference (WCNC) 2004, pp.1578-1582
- 협약과제
- 04MB1200, 60GHz Pico Cell 통신용 SoP(구:60GHz 광대역 무선 LAN 기술 개발), 조경익
- 초록
- In this paper, we investigate single carrier frequency-domain equalization (SC-FDE) for distributed spacetime block codes (D-STBC) in a relay-assisted transmission scenario over frequency-selective fading channels. We assume the special case of a single-relay where the source-to-relay (S ?넂 R), relay-to-destination (R ?넂 D), and source-to-destination (S ?넂 D) links experience possibly different channel delay spreads. Assuming perfect power control between R ?넂 D and S ?넂 D links and high signal-to-noise ratio for all underlying links, our performance analysis demonstrates that SC-FDE for D-STBC is able to achieve a maximum diversity order of min(L1, L 3) +L2+2 where L1, L2, and L 3are the channel memory lengths for S ?넂 R, S ?넂 D, and R ?넂 D links, respectively. This illustrates that the smaller of the multipath diversity orders experienced in S ?넂 A and R ?넂 D links becomes the performance bottleneck for the relaying path. For the special case of a non-fading relaying path where line-of-sight propagation is possible in either one of these underlying links, we demonstrate that the maximum diversity orders of L1+L2+2 and L3+L2+2 are achievable assuming non-fading R ?넂 D and S ?넂 R links, respectively. An extensive Monte Carlo simulation study is presented to corroborate the analytical results and to provide detailed performance comparisons among the competing schemes. © 2006 IEEE.
- KSP 제안 키워드
- Block codes, CDMA systems, Channel delay, D-STBC, Delay spread, Diversity Order, Frequency Selective Fading Channels, Frequency domain equalization(FDE), High signal-to-noise ratio, Line-Of-Sight(LOS), Line-of-sight propagation