협동 전송 방식을 이용한 OFDMA 시스템에서의 자원 관리에 관한 연구

Resource Allocation in OFDMA System with User Cooperation

  • 발행 : 2006.11.17

초록

Orthogonal frequency division multiple access (OFDMA) has emerged as one of the core multiple access schemes in 4G to mitigate the problems of frequency selectivity and inter-symbol interferences. In OFDMA, cooperative transmission can be adopted in transmission between each user and base station. Cooperative transmission can provide better channel environments and additional transmitter diversity. In this paper, we formulate a user and subcarrier assignment problem in OFDMA system with user cooperation and propose an efficient scheme to solve it.

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