콘텐츠 본문
논문 해외 국제전문학술지(SCI급) FRAME DESIGN AND THROUGHPUT EVALUATION FOR PRACTICAL MULTIUSER MIMO OFDMA SYSTEMS
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2011-09
- 저자명 정의림공동(참여),JOUNG, J.,SHIN, W.-Y.,JANG, Y.-U.
- 학술지명 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
- 발행처명 Institute of Electrical and Electronics Engineers
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
논문 초록 (Abstract)
This paper describes the design of a time-division duplexing frame with a variety of pilots for multiuser multiple-input-multiple-output orthogonal frequency-division multiple access (MU-MIMO OFDMA) systems, where the base station and users are equipped with four and two transmitting and receiving antennas, respectively. In addition, a simplified scheduling algorithm for the MU-MIMO OFDMA is proposed, and its computational complexity is analyzed. The proposed scheduling algorithm shows comparable sum achievable rates to the optimal MU-MIMO OFDMA scheduling that searches for user pairs in an exhaustive manner, whereas its complexity is fairly reduced. Furthermore, to verify the performance of MU-MIMO OFDMA systems that employ the proposed frame structure and scheduling algorithm, a system-level comparison of the average cell throughputs between the proposed MU-MIMO and the conventional MIMO OFDMA systems is numerically performed in a practical cellular environment. As a result, vital information on how we can apply MU-MIMO OFDMA schemes in cellular environments is provided.
