Double-Layered Coordinated Resource Allocation In Multi-Cell MIMO-OFDMA Systems
محل انتشار: بیست و یکمین کنفرانس مهندسی برق ایران
سال انتشار: 1392
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 989
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شناسه ملی سند علمی:
ICEE21_144
تاریخ نمایه سازی: 27 مرداد 1392
چکیده مقاله:
In this paper, we aim to formulate the coordinated beam-forming problem for a multi-cell MIMO-OFDMA system by an optimization method. The formulation has been done fordownlink channel, using double layer pre-coder and post-coder matrices in both transmitter and receiver. We have proposed aniterative algorithm to find the proper beam-forming matrices in such a way that minimizes the mean square error (MMSE) in internal layer and maximizes the total system throughput in external layer. Our proposed algorithm guarantees the MMSE at each user in each subcarrier and also maximizes the sumrate of multi-cell system. The simulation results show that the proposed method leads to a greater throughput in comparisonwith conventional algorithms and provides substantial performance gains compared to single-cell optimization
کلیدواژه ها:
نویسندگان
Ahmad Kasaeyan
K.N. Toosi University
Kamal Mohamed-pour
K.N. Toosi University
Seyed Mehdi Hosseini Andargoli
Babol Noshirvani University