İşbirlikli-Dikgen Olmayan Çoklu Erişimin Nakagami-m Sönümlemeli Kanallardaki Hata Analizi

Dikgen-Olmayan Çoklu Erişim Non-orthogonal Multiple Access -NOMA 5G ve ötesi ağlar için önemli isterler olan kitlesel iletişimi destekleyebilme ve yüksek spektral verimlilik sağlayabilme potansiyeli nedeniyle yeni nesil kablosuz iletişim için önem arz etmektedir. NOMA’da vericiye daha yakın konumda bulunan kullanıcılar -hücre içi kullanıcılar-, vericiye daha uzak konumda bulunan -hücre kenarı- kullanıcıların sembollerini bildiği için, NOMA’nın en büyük avantajlarından birisi de işbirlikli haberleşmeye uygun olmasıdır. Bu çalışmada işbirlikli-NOMA olarak adlandırılan bu sistemler için bit hata başarımları Nakagami-m sönümlemeli kanallarda analiz edilmiştir. İşbirlikli-NOMA için uçtan-uca bit hata olasılığı ifadesi kapalı formda elde edilmiştir. Elde edilen ifadeler Monte Carlo benzetimleri ile doğrulanarak sistem parametrelerinin İşbirlikli-NOMA’nın hata başarımı üzerindeki etkileri incelenmiştir

Anahtar Kelimeler:

Dikgen Olmayan Çoklu Erişim NOMA, 5G, İşbirlikli haberleşme, Hata analizi, Nakagami-m sönümleme

Error Analysis of Cooperative-Non-Orthogonal Multiple Access NOMA over Nakagami-m Fading Channels

Non-Orthogonal Multiple Access NOMA has a key role for future wireless networks because of its potential for supporting massive connectivity and achieving high spectral efficiency which are demands of top priority for 5G and beyond. Another major advantage of NOMA is that cooperative communication can be applied within NOMA since the intra-cell users -close to the base station- have the priori knowledge of cell-edge users’ -far from the base station- symbols. In this paper, we analyze error performance of these systems which are called as cooperative-NOMA over Nakagami-m fading channels. The end-to-end bit error probability for cooperativeNOMA is derived in closed-form. Then, the derived expressions are validated via Monte Carlo simulations and we investigate the effect of the system parameters on the error performance of cooperative-NOMA.

Keywords:

Non-Orthogonal Multiple Access NOMA , 5G, Cooperative communication, Error analysis, Nakagami-m fading,

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