Quadrature spatial modulation sub-carrier intensity modulation (QSM-SIM) for VLC
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Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this paper, a new spectrally efficient modulation scheme called quadrature spatial modulation sub-carrier intensity modulation (QSM-SIM) is proposed for multiple-input multiple-output (MIMO) visible light communication (VLC) systems. In QSM-SIM, in addition to the digital modulation symbols, two LED indices are used simultaneously for transmission of data bits with the help of a sinusoidal signal pair. Then, spatial modulation quad-LED complex modulation (SM-QCM), which is based on quad-LED complex modulation (QCM), is enhanced such that the number of LEDs is greater than four. Bit error rate (BER) performances of the considered modulation schemes are analyzed for different MIMO plans. The upper bound on BER performances of the QSM-SIM and SM-QCM schemes are derived analytically in order to validate the simulation results. In this work, pulse amplitude modulation (PAM), QCM, and SIM are used as benchmarks. In addition, for the purpose of reducing channel correlation, the power imbalance (PI) method is applied to the VLC-MIMO system. Best power imbalance factors are obtained for the considered modulation schemes and benchmarks under fixed signal to noise ratio (SNR) values. The results show that the proposed schemes outperform the benchmarks with PI communication scenarios.
Açıklama
Çelik, Yasin ( Aksaray, Yazar )
Anahtar Kelimeler
Index Modulation, QSM-SIM, SM-QCM, Visible Light Communication
Kaynak
Physical Communication
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
38
Sayı
-
