The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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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
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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.

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References

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