Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System
In an indoor multiple-input multiple-output (MIMO) visible light communication (VLC) system, line of sight (LoS) channel links are present between a light-emitting diode (LED) based transmitter and a photodetector (PD) based receiver. The PDs in the receiver are closely packed resulting in a high ch...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Sakarya University
2022-10-01
|
| Series: | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/1475990 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846111429087723520 |
|---|---|
| author | Aamir Ullah Khan Yasin Çelik Sultan Aldırmaz Çolak |
| author_facet | Aamir Ullah Khan Yasin Çelik Sultan Aldırmaz Çolak |
| author_sort | Aamir Ullah Khan |
| collection | DOAJ |
| description | In an indoor multiple-input multiple-output (MIMO) visible light communication (VLC) system, line of sight (LoS) channel links are present between a light-emitting diode (LED) based transmitter and a photodetector (PD) based receiver. The PDs in the receiver are closely packed resulting in a high channel correlation. To overcome channel correlation and improve the performance of the MIMO-VLC system, angle diversity receivers (ADRs) are commonly employed. The channel matrix entries depend on the normal vectors of the PDs, which in turn depend on the elevation angle (EA) of the PDs. Thus, by having normal vectors pointing in different directions, the channel correlation can be considerably reduced. This paper considers a special type of ADR called pyramid receiver (PR) and employs a 4x4 MIMO-VLC system. In this paper, different MIMO algorithms such as repetition coding (RC) and spatial multiplexing (SMP) are considered to exhibit and compare the bit-error-rate (BER) performance of the fixed and variable EA MIMO-VLC systems. The results show that an SMP-employed MIMO-VLC system outperforms the RC-employed MIMO-VLC system. SMP results in an spatial multiplexing gain that varies linearly with the number of LEDs whereas RC does not yield any spatial multiplexing gain. To attain the same spectral efficiency i.e. 4 bit/s/Hz, a larger signal constellation size is required for RC employed MIMO-VLC system to achieve the same BER as of an SMP employed MIMO-VLC system. Similarly, the BER performance of variable EA MIMO-VLC systems is better as compared to fixed EA MIMO-VLC systems. |
| format | Article |
| id | doaj-art-ccd6990869044947ac0bbeb83c7c7ba6 |
| institution | Kabale University |
| issn | 2147-835X |
| language | English |
| publishDate | 2022-10-01 |
| publisher | Sakarya University |
| record_format | Article |
| series | Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi |
| spelling | doaj-art-ccd6990869044947ac0bbeb83c7c7ba62024-12-23T08:10:55ZengSakarya UniversitySakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi2147-835X2022-10-0126594295510.16984/saufenbilder.84940828Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC SystemAamir Ullah Khan0https://orcid.org/0000-0003-2352-5697Yasin Çelik1https://orcid.org/0000-0001-8972-9970Sultan Aldırmaz Çolak2https://orcid.org/0000-0001-7154-0723KOCAELİ ÜNİVERSİTESİAKSARAY ÜNİVERSİTESİKOCAELİ ÜNİVERSİTESİIn an indoor multiple-input multiple-output (MIMO) visible light communication (VLC) system, line of sight (LoS) channel links are present between a light-emitting diode (LED) based transmitter and a photodetector (PD) based receiver. The PDs in the receiver are closely packed resulting in a high channel correlation. To overcome channel correlation and improve the performance of the MIMO-VLC system, angle diversity receivers (ADRs) are commonly employed. The channel matrix entries depend on the normal vectors of the PDs, which in turn depend on the elevation angle (EA) of the PDs. Thus, by having normal vectors pointing in different directions, the channel correlation can be considerably reduced. This paper considers a special type of ADR called pyramid receiver (PR) and employs a 4x4 MIMO-VLC system. In this paper, different MIMO algorithms such as repetition coding (RC) and spatial multiplexing (SMP) are considered to exhibit and compare the bit-error-rate (BER) performance of the fixed and variable EA MIMO-VLC systems. The results show that an SMP-employed MIMO-VLC system outperforms the RC-employed MIMO-VLC system. SMP results in an spatial multiplexing gain that varies linearly with the number of LEDs whereas RC does not yield any spatial multiplexing gain. To attain the same spectral efficiency i.e. 4 bit/s/Hz, a larger signal constellation size is required for RC employed MIMO-VLC system to achieve the same BER as of an SMP employed MIMO-VLC system. Similarly, the BER performance of variable EA MIMO-VLC systems is better as compared to fixed EA MIMO-VLC systems.https://dergipark.org.tr/tr/download/article-file/1475990angle diversity receiveroptical wireless communicationpyramid receivervisible light communication |
| spellingShingle | Aamir Ullah Khan Yasin Çelik Sultan Aldırmaz Çolak Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi angle diversity receiver optical wireless communication pyramid receiver visible light communication |
| title | Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System |
| title_full | Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System |
| title_fullStr | Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System |
| title_full_unstemmed | Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System |
| title_short | Performance Analysis of MIMO Techniques for a Pyramid Receiver in an Indoor MIMO-VLC System |
| title_sort | performance analysis of mimo techniques for a pyramid receiver in an indoor mimo vlc system |
| topic | angle diversity receiver optical wireless communication pyramid receiver visible light communication |
| url | https://dergipark.org.tr/tr/download/article-file/1475990 |
| work_keys_str_mv | AT aamirullahkhan performanceanalysisofmimotechniquesforapyramidreceiverinanindoormimovlcsystem AT yasincelik performanceanalysisofmimotechniquesforapyramidreceiverinanindoormimovlcsystem AT sultanaldırmazcolak performanceanalysisofmimotechniquesforapyramidreceiverinanindoormimovlcsystem |