توازن SINR از طریق اعمال توام تخصیص توان و انتخاب آنتن در مسیر فراسوی یک سیستم چند ورودی چند خروجی چند کاربره انبوه

نوع مقاله : مخابرات - سیستم

نویسندگان

دانشگاه سراسری یزد

چکیده

در این مقاله یک الگوریتم توزیعی مبتنی بر توان سیگنال پایلوت ارسال شده توسط آنتن­های‌BS  در مسیر فروسو جهت کنترل توان در مسیر فراسوی هر یک از کاربرها برای حل مسئله توازن در نرخ ارسال و دریافت بین کاربرها و آنتن­های BS در یک شبکه چند ورودی چند خروجی چند سلولی انبوه پیشنهاد شده است. الگوریتم پیشنهادی به گونه‌‌ای است که هر یک از کاربرها مجموعه‌ای از آنتن­های کلیه BS های سیستم را به‌عنوان آنتن­های گروهی خانگی خود انتخاب می­کنند و بر اساس توان پایلوت­های دریافتی از آنها اقدام به تنظیم توان خود از طریق حل یک معادله چند جمله‌ای می­کنند. الگوریتم به‌صورت بازگشتی و تکرارشونده اجرا شده و پس از چندین تکرار، SINR هر کاربر در آنتن­های گروهی خانگی خود به یک مقدار برابر همگرا خواهد شد. نتایج شبیه‌سازی عملکرد خوب الگوریتم در جهت افزایش بهره‌وری انرژی مصرفی به کمک انتخاب مناسب المان‌های آنتن و تنظیم توان ارسالی کاربران را نشان می‌دهد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

SINR Balanced Power Allocation and Antenna Selection in uplink Multiuser Massive MIMO Systems

نویسندگان [English]

  • J. Ranjbar
  • R. Saadat
Yazd university
چکیده [English]

 In this paper, a distributed pilot-based power control algorithm is proposed that controls the transmitted power of each user in the uplink direction base on pilot’s measurement in the downlink direction to address the SINR balancing and antennas selection in a multi-user massive MIMO system. In the proposed algorithm, each user chooses a set of antennas of all BSs as their home group antennas and based on their received pilot power, adjust their transmitting power by solving a polynomial equation. The algorithm is performed recursively and after several repetitions, the SINR values of all users converge to the same value in their home group antennas. The simulation results illustrate the improvement in energy efficiency by choosing proper antennas selection and power adjustment.

کلیدواژه‌ها [English]

  • Massive MIMO
  • SINR Balancing
  • Power Control
  • Antenna Selection
 
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