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Promising Practical Infrastructure Solutions for 6G Based on RIS and Cell Free Massive MIMO network | ||
| مجله مهندسی برق دانشگاه تبریز | ||
| مقالات آماده انتشار، اصلاح شده برای چاپ، انتشار آنلاین از تاریخ 15 اسفند 1403 | ||
| نوع مقاله: علمی-پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/tjee.2025.63976.4905 | ||
| نویسندگان | ||
| افشین ابراهیمی* 1؛ اکبر مظهری سرای2 | ||
| 1عضو هیات علمی/دانشگاه صنعتی سهند | ||
| 2دانشگاه صنعتی سهند | ||
| چکیده | ||
| Cell free massive MIMO system is a promising candidate to overcome the shortcomings of the conventional cellular system and a suitable technique to achieve the goals of the sixth generation (6G) networks. Costs of implementing on large scale is one of the major disadvantages of this system. Recently, with the emergence of reconfigurable intelligent surfaces (RIS), we can hope for the reduction of these costs and the practical implementation of this system. In this regard, in this paper we have investigated the spectral performance of the scalable form of cell free with and without RISs. Lower bounds of uplink spectral efficiency involving imperfect channel estimation and pilot contamination effects for L-MMSE and LP-MMSE decoders is derived. The simulation results confirm the superior spectral efficiency performance of RIS-based proposed system (especially in centralized RIS- cell free mode) compared to the Scalable cell free system. | ||
| کلیدواژه‌ها | ||
| Cell-free؛ Massive MIMO؛ RIS؛ Spectral Efficiency؛ dynamic cooperation clustering (DCC)؛ Direct and cascaded channels | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 331 |
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