Kaskat bir sistemin FTR sönümlemeli kanallarda HQAM performans analizi

Yıl 2022, , 258 - 263, 15.04.2022

Caner Özen Mehmet Bilim

https://doi.org/10.28948/ngumuh.1034147

Cited By: 1

Öz

Bu çalışmada kaskat yapıya sahip bir sistemin dalgalanmalı iki ışınlı (fluctuating two-ray, FTR) sönümlenmeli kanallarda
altıgen karesel genlik modülasyonu (hexagonal quadrature amplitude modulation, HQAM) analizi gerçekleştirilmiştir. Yapılan
analizlerde ele alınan sistemin olasılık yoğunluk fonksiyonu (probability density function, PDF) kullanılmıştır. Sunulan hata
analizlerinde hem yaklaşık hata ifadesi hem de matematiksel olarak daha sade bir analiz için asimptotik hata ifadesi
türetilmiştir. Ele alınan sistemin performans değerlendirmeleri farklı kaskat bağlantı sayısı, sönümlenme parametre değerleri,
yansıtıcı parametre değerleri ve modülasyon seviyeleri için gerçekleştirilmiştir. Yapılan analizler sonucunda elde edilen
analitik ve asimptotik ifadelerin doğruluğu tam nümerik sonuçlarla gösterilmiştir.

Anahtar Kelimeler

Kaskat FTR sönümlenmesi, hata olasılığı analizi, HQAM tekniği

Performance analysis of HQAM for a cascaded system over FTR fading channels

Öz

In this study, performance analysis of a cascaded system with hexagonal quadrature amplitude modulation (HQAM) is performed over fluctuating two-ray (FTR) fading channels. The probability density function of the considered system is employed in the analysis. In the presented error analysis, both the approximate error expression and the asymptotic error expression for a simpler mathematical analysis are derived. Performance evaluations of the considered system are carried out for different number of cascade connections, fading parameter values, reflective parameter values and modulation levels. Finally, the accuracy of the analytical and asymptotic expressions obtained as a result of the analyses is shown with exact numerical results.

Anahtar Kelimeler

Cascaded FTR fading, Error probability analysis, HQAM technique

Kaynakça

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