تداخل چندسلولی در شبکه‌های چندرله در حضور کانال‌های محوشدگی ناکاگامی

نوع مقاله : مقاله پژوهشی

نویسنده

دانشکده مهندسی برق و کامپیوتر، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

چکیده

در این مقاله، سه پروتکل انتخاب رله برای شبکه‌های چندسلولی با چندین رله کدگشائی و ارسال که توسط چندین تداخلگر در گره‌های رله و مقصد مورد هدف قرار گرفته‌اند، پیشنهاد و تحلیل می‌شود. سه پروتکل زیر بررسی می‌شود: 1) بهترین - بدترین فرصت‌طلبانه (OBW) که در آن مقصد بهترین سیگنال بین ارسال‌های از طریق رله و مستقیم را انتخاب می‌کند. 2) ترکیب‌گر لینک مستقیم بهترین - بدترین (BWDC) که در آن مقصد ارسال‌های مستقیم و از طریق رله را با استفاده از ترکیب‌گر حداکثر نسبت ترکیب می‌کند. و 3) بهترین - بدترین فرصت‌طلبانه هیبرید (HOBW) که در آن مقصد تنها در صورتی ارسال از طریق رله را انتخاب می‌کند که ارسال مستقیم در حالت قطعی باشد. برای هر کدام از این حالات، روابط به فرم بسته برای احتمال قطع روی کانال‌های محوشدگی ناکاگامی مستقل و ناهمسان (i.n.i.d) به‌دست می‌آید. سپس مفاهیم طراحی جدیدی برای احتمال قطع در محیط‌های پرتداخل به‌دست می‌آید. در مقایسه با BWDC ،OBW و HOBW گیرنده با پیچیدگی کمتر را پیشنهاد می‌دهند. همچنین، OBW و HOBW به احتمال قطع کمتری نسبت به BWDC در محیط‌های پرتداخل دست می‌یابند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Multi-cell Interference in Multi-Relay Networks with Nakagami-m Fading Channels

نویسنده [English]

  • E. Soleimani Nasab
Department of Electrical and Computer Engineering, Graduate University of Advanced Technology, Kerman, Iran
چکیده [English]

In this paper, three relay selection protocols for multi-cell networks with multiple decode-and-forward relays targeted by multiple interferers at the relay and the destination are proposed and analyzed. The following three protocols are considered: 1) opportunistic best-worst (OBW) where the destination selects the best signal between the direct and the relayed transmissions, 2) best-worst direct link combiner (BWDC) where the destination combines the direct and the relayed transmissions using maximum ratio combining, and 3) hybrid opportunistic best-worst (HOBW) where the destination only selects the relayed transmission when the direct transmission is in outage. For each of these, new closed-form expressions for the outage probability over independent non-identically distributed (i.n.i.d.) Nakagami-m fading channels are derived. New design insights into the outage probability in the high interference regime are obtained. Compared to BWDC, OBW and HOBW offer a lower complexity receiver. Further, we show that OBW and HOBW achieve a lower outage probability relative to BWDC in the high interference regime.

کلیدواژه‌ها [English]

  • Interference channel
  • Decode-and-forward
  • Opportunistic relaying
  • Outage probability
  • Nakagami-m fading

مراجع

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