Görünür ışık haberleşme sistemleri için çoklu darbeli modülasyon tekniklerinin analizi

Yıl 2021, Cilt: 11 Sayı: 1, 103 - 110, 15.01.2021

Mehmet Sonmez

https://doi.org/10.17714/gumusfenbil.722570

Öz

Bu çalışmada, standart OPPM (Örtüşen Darbe Konum Modülasyonu), Sarılı OPPM ve Çok seviyeli PPM şemaları için bir performans analizi verilmiştir. Modülasyon şemalarının Bit Hata Oranı (BHO) performansları iletim mesafesine göre elde edilmiştir. Simülasyon sonuçlarından, MPPM’in OPPM ve W-OPPM den daha iyi bir performansa sahip olduğu görülmektedir. W-OPPM ve MPPM ile karşılaştırıldığında, standart OPPM daha iyi spektral verimliliğe sahiptir. Ayrıca slot başına örnek sayısı modülasyon yöntemleri için eşit alınırsa; MPPM, W-OPPM ve standart OPPM bir paket veriyi 19.29, 30.38 ve 38.41 us süresince iletir. Modülasyon ve demodülasyon süreçlerinin gözlemlenmesi için yöntemler ayrıca Alanda Programlanabilir Kapı Dizileri (FPGA) derleyicisi Quartus’ta tasarlanmıştır. Çalışmada özellikle, uygulanabilir demodülatör mimarileri elde edilmiştir.

Anahtar Kelimeler

Çok seviyeli PPM (MPPM), Örtüşen PPM (OPPM), Görünür ışık haberleşmesi (GIH), Sarılı OPPM (W-OPPM)

Analysis of multi-pulse modulation techniques for visible light communication systems

Öz

In this paper, a performance analysis is given for standard OPPM (Overlapping Pulse Position Modulation), W-OPPM (Wrapped OPPM) and Multilevel PPM (MPPM) schemes. The Bit Error Rate (BER) performances of modulation schemes are achieved in terms of transmission distance. From simulation results, it is shown that standard OPPM has better spectral efficiency compared to the MPPM and W-OPPM. Additionally, MPPM, W-OPPM and standard OPPM transmit a packet data during 19.29, 30.85 and 38.41us, respectively if the sample number per slot is taken as equal for modulation techniques. The methods are also designed in Field Programmable Gate Arrays (FPGA) complier Quartus to observe modulation and demodulation processes. Especially, it is achieved the practicable demodulator architectures in the paper.

Anahtar Kelimeler

Multilevel PPM (MPPM), Overlapping PPM (OPPM), Visible light communication (VLC), Wrapped OPPM (W-OPPM)

Kaynakça

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