Optical MIMO-OFDM with generalized LED index modulation

Name: Optical MIMO-OFDM with generalized LED index modulation
Author: Yesilkaya, A., Basar, E., Miramirkhani, Farshad, Panayirci, E., Uysal, Murat

İsim	Optical MIMO-OFDM with generalized LED index modulation
Yazar	Yesilkaya, A., Basar, E., Miramirkhani, Farshad, Panayirci, E., Uysal, Murat
Basım Tarihi:	2017-08
Basım Yeri	- IEEE
Konu	Visible light communications (VLC), Multiple-input-multiple-output (MIMO) systems, Orthogonal frequency division multiplexing (OFDM), Optical-spatial modulation (OSM), LED index modulation, Maximum-a-posteriori probability (MAP) estimator
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	0090-6778
Kayıt Numarası	f0dc0051-48a6-41ae-b765-1f2801b373bf
Lokasyon	Electrical & Electronics Engineering
Tarih	2017-08
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	Visible light communications (VLC) is a promising and uncharted new technology for the next generation of wireless communication systems. This paper proposes a novel generalized light emitting diode (LED) index modulation method for multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM)-based VLC systems. The proposed scheme avoids the typical spectrum efficiency losses incurred by time- and frequency-domain shaping in OFDM signals. This is achieved by exploiting spatial multiplexing along with LED index modulation. Accordingly, real and imaginary components of the complex time-domain OFDM signals are separated first, then resulting bipolar signals are transmitted over a VLC channel by encoding sign information in LED indexes. As a benchmark, we demonstrate the performance analysis of our proposed system for both analytical and physical channel models. Furthermore, two novel receiver designs are proposed. Each one is suitable for frequency-flat or selective channel scenarios. It has been shown via extensive computer simulations that the proposed scheme achieves considerably better bit error ratio versus signal-to-noise-ratio performance than the existing VLC-MIMO-OFDM systems that use the same number of transmit and receive units [LEDs and photo diodes (PDs)]. Compared with the single-input single-output (SISO) DC biased optical (DCO)-OFDM system, both spectral efficiency and DC bias can be doubled and removed respectively simply by exploiting a MIMO configuration.
DOI	10.1109/TCOMM.2017.2699964
Cilt	65

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Optical MIMO-OFDM with generalized LED index modulation

Yazar Yesilkaya, A., Basar, E., Miramirkhani, Farshad, Panayirci, E., Uysal, Murat

Basım Tarihi 2017-08

Basım Yeri - IEEE

Konu Visible light communications (VLC), Multiple-input-multiple-output (MIMO) systems, Orthogonal frequency division multiplexing (OFDM), Optical-spatial modulation (OSM), LED index modulation, Maximum-a-posteriori probability (MAP) estimator

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 0090-6778

Kayıt Numarası f0dc0051-48a6-41ae-b765-1f2801b373bf

Lokasyon Electrical & Electronics Engineering

Tarih 2017-08

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin Visible light communications (VLC) is a promising and uncharted new technology for the next generation of wireless communication systems. This paper proposes a novel generalized light emitting diode (LED) index modulation method for multiple-input-multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM)-based VLC systems. The proposed scheme avoids the typical spectrum efficiency losses incurred by time- and frequency-domain shaping in OFDM signals. This is achieved by exploiting spatial multiplexing along with LED index modulation. Accordingly, real and imaginary components of the complex time-domain OFDM signals are separated first, then resulting bipolar signals are transmitted over a VLC channel by encoding sign information in LED indexes. As a benchmark, we demonstrate the performance analysis of our proposed system for both analytical and physical channel models. Furthermore, two novel receiver designs are proposed. Each one is suitable for frequency-flat or selective channel scenarios. It has been shown via extensive computer simulations that the proposed scheme achieves considerably better bit error ratio versus signal-to-noise-ratio performance than the existing VLC-MIMO-OFDM systems that use the same number of transmit and receive units [LEDs and photo diodes (PDs)]. Compared with the single-input single-output (SISO) DC biased optical (DCO)-OFDM system, both spectral efficiency and DC bias can be doubled and removed respectively simply by exploiting a MIMO configuration.

DOI 10.1109/TCOMM.2017.2699964

Cilt 65