İki Yönlü Dik Uzaysal Modülasyon

Öz

Bu çalışmada, iki kullanıcının dik uzaysal modülasyon (quadrature spatial modulation (QSM)) iletim tekniği kullanarak, yarı çift-yönlü (half-duplex) bir röle yardımı ile   haberleşmesini sağlayan iki-yönlü QSM sistemi önerilmiştir. Buna göre, birinci zaman diliminde, eşit hızlı iki kullanıcı, bilgilerini, QSM iletim tekniği ile yarı çift-yönlü bir röleye iletmektedir. İkinci zaman diliminde ise, iki kullanıcıdan röleye gelen bilgi simgeleri ortak olarak çözüldükten sonra bit düzeyinde XOR (ayrıcalıklı veya) işlemi uygulanarak, QSM iletim tekniği ile  kullanıcıara gönderilmektedir. Her kullanıcı, röleden gönderilen bilgi ile kendi bilgisine XOR işlemi uygulayarak diğer kullanıcının bilgisine ulaşmaktadır. QSM  için tasarlanan sistem, aynı şekilde  referans bir yapı olabilmesi açısından uzaysal modülasyon (spatial modulation (SM)) sistemi için de gerçeklenmiştir.   İki-yönlü QSM ve SM sistemlerinin kuramsal hata analizi yapılarak ortalama bit hata olasılığı (ABEP) elde edilmiştir. Ayrıca farklı bant verimlilikleri ve MIMO yapıları için iki-yönlü QSM ve  iki-yönlü SM sistemlerinin hata başarımları karşılaştırılmıştır.

Anahtar Kelimeler

• Uzaysal modülasyon (SM),dik uzaysal modülasyon (QSM),fiziksel katman ağ kodlama (PLNC),çok-girişli çok-çıkışlı (MIMO)

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