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Performance Analysis of MIMO-OFDMA System Applying Dynamic Resource Allocation

동적 자원 할당 기법을 적용한 MIMO-OFDMA 시스템 성능 분석

  • Lee, Yun-Ho (Department of Radio Communication Engineering, Chungbuk National University) ;
  • Kim, Kyung-Seok (Department of Radio Communication Engineering, Chungbuk National University)
  • 이윤호 (충북대학교 전파통신공학과) ;
  • 김경석 (충북대학교 전파통신공학과)
  • Published : 2008.06.30

Abstract

The adaptive resource optimization problem in multi-input multi-output orthogonal frequency division multiple access (MIMO-OFDMA) systems is addressed. This paper, adaptive modulation and coding(AMC) and power control algorithms is proposed with SFC(Space-Frequency Coding), which aims to maximize the system capacity based on the CQI(Channel Quality Information). Firstly, power level is decided to each sub-channels with received feedback signal to noise ratio(SNR). In the second step, sub-carriers are allocated according to modulation type. Simulation results show that the proposed algorithm achieves a better performance than conventional algorithm in terms of capacity.

MIMO-OFDMA 시스템에서 자원 할당의 최적화 문제가 거론되고 있다. 본 논문은 SFC 방식 아래 채널에 대한 정보를 가지고 적응 변조 및 부호 기법과 전력 제어 기법을 적용하여 전체 시스템 처리량의 최대화에 목표를 두었다. 첫 번째로 수신 받은 채널에 대한 정보를 기반으로 각 서브 채널의 전력 레벨이 결정된다. 그 다음으로는 변조 타입에 맞게 서브캐리어가 할당되어진다. 시뮬레이션 결과는 실제로 전송되어진 데이터 용량 측면에서 기존의 알고리즘보다 제안한 알고리즘이 더 나은 성능을 보인다.

Keywords

References

  1. Jun Cai, Xuemin Shen, and J. W. Mark, "Downlink resource management for packet transmission in OFDM wireless communication systems", IEEE Trans., vol. 4, pp. 1688-1703, Jul. 2005
  2. P. Uthansakul, M. E. Bialkowski, "Multipath signal effect on the capacity of MIMO, MIMO-OFDM and spread MIMO-OFDM", IEEE CNF, vol. 3, pp. 989- 992, May 2004
  3. G. Li, H. Liu, "On the optimality of downlink OFDMA MIMO systems", IEEE CNF, vol. 1, pp. 324-328, Nov. 2004
  4. R. A. Berry, E. M. Yeh, "Cross-layer wireless resource allocation", IEEE Trans., vol. 21, pp. 59-68, Sep. 2004
  5. A. J. Goldsmith, S. G. Chua, "Adaptive coded modulation for fading channels", IEEE Trans., vol. 46, pp. 595-602, May 1998 https://doi.org/10.1109/26.668727
  6. Hongku Kang, Wooncheol Hwang, and Kiseon Kim, "Practical subchannel power controlled OFDM system under time-varying multipath channel", IEEE CNF, vol. 3, pp. 1015-1018, Oct. 2002
  7. Jian Xu, Jong Kyung Kim, Wonkyu Paik, and Jong-Soo Seo, "Adaptive resource allocation algorithm with fariness for MIMO-OFDMA system", IEEE CNF, vol. 6, pp. 1585-1589, May 2006
  8. M. Torabi, S. Aissa, and M. R. Soleymain, "On the BER performance of space-frequency block coded OFDM systems in fading MIMO channels", IEEE Trans., vol. 6. pp. 1366-1373, Apr. 2007