Generalized Spatial Modulation in Indoor Wireless Visible Light Communication

Alaka, S. P.; Narasimhan, T. Lakshmi; Chockalingam, A.

doi:10.1109/glocom.2015.7416970

Cited by 66 publications

(18 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therfore, It should be also noted here that spatial domain is not exploited to transmit any information bits. Consequently, in contrast to [2], [4] increasing the modulation order does not increase the number of required LEDs, as it will be shown in section II. Furthermore, in certain scenarios our SQM scheme can correct transmission error, i.e.…”

Section: Introductionmentioning

confidence: 92%

“…This architecture is less complex compared to the joint MLD proposed in [2]; especially for higher order modulation. For example, considering a modulation order of M = 256, the received signal y should be compared against 256 possible transmitted symbols in joint detection.…”

Section: B Sqm Transceiver Structurementioning

confidence: 99%

“…Schemes such as spatial modulation (SM) have been proposed to overcome the limited BW [2]. Other schemes such as optical space modulation (OSM) have been proposed to transmit bipolar signals [3].…”

Section: Introductionmentioning

confidence: 99%

“…even if the index of the antenna was incorrectly detected, the transmitted symbol can still be perfectly recovered without introducing any symbol error. In addition, our proposed SQM scheme implements a low complexity receiver, unlike the joint detection in [2] where an increase of one modulation order yields a two-fold increase in complexity, that is composed of two maximum likelihood detection (MLD) phases. Phase one detects the index of the transmitter, while phase two detects the amplitude, which limits the increase in complexity for high modulation order.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spatial quadrature modulation for visible light communication in indoor environment

Dawoud¹,

Héliot²,

Imran

et al. 2017

2017 IEEE International Conference on Communications (ICC)

View full text Add to dashboard Cite

Abstract-In this paper, a novel low-complexity and spectrally efficient modulation scheme for visible light communication (VLC) is proposed. Our new spatial quadrature modulation (SQM) is designed to efficiently adapt traditional complex modulation schemes to VLC; i.e. converting multi-level quadrature amplitude modulation (M -QAM), to real-unipolar symbols, making it suitable for transmission over light intensity. The proposed SQM relies on the spatial domain to convey the orthogonality and polarity of the complex signals, rather than mapping bits to symbol as in existing spatial modulation (SM) schemes. The detailed symbol error analysis of SQM is derived and the derivation is validated with link level simulation results. Using simulation and derived results, we also provide a performance comparison between the proposed SQM and SM. Simulation results demonstrate that SQM could achieve a better symbol error rate (SER) and/or data rate performance compared to the state of the art in SM; for instance a E b /No gain of at least 5 dB at a SER of 10 −4 .

show abstract

Section: Introductionmentioning

confidence: 92%

Section: B Sqm Transceiver Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatial quadrature modulation for visible light communication in indoor environment

Dawoud¹,

Héliot²,

Imran

et al. 2017

2017 IEEE International Conference on Communications (ICC)

View full text Add to dashboard Cite

show abstract

“…Such schemes are referred to as generalised spatial modulation (GSM) [5,[16][17][18]. GSM offers spectral efficiency gain by increasing the number of bits transmitted during each symbol duration.…”

Section: Generalised Spatial Modulation (Gsm)mentioning

confidence: 99%

Spatial Modulation – A Low Complexity Modulation Technique for Visible Light Communications

Olanrewaju¹,

Ogunkoya²,

Popoola³

2017

Visible Light Communications

View full text Add to dashboard Cite

In visible light communication (VLC), the fundamental limitation on the achievable data rate/spectral efficiency is imposed by the optical source, particularly the phosphorconverted white light emitting diode (LED). These low-cost white LEDs favoured in solid-state lighting have very limited modulation bandwidth of less than 5 MHz, typically. This imposes a severe limitation on the attainable data rate. This is recognised in the literature and has led to the emergence of techniques such as multiple-input-multipleoutput (MIMO) VLC systems as a means of addressing this challenge. The MIMO approach takes advantage of the multi-LED/multi-receiver structure to improve performance. In this chapter, we shall be discussing spatial modulation (SM) as a novel lowcomplexity MIMO technique for the VLC system. The SM technique exploits the spatial location of the individual LED as an additional degree of freedom in data modulation. Moreover, the chapter includes the comparison analysis of the SM technique with other traditional methods of modulation such as on-off keying (OOK) and pulse position modulation (PPM).

show abstract

Performance analysis in multiuser downlink visible light communication MIMO system using SSK and optical orthogonal codes

Wu,

Chen

2024

Int J Communication

View full text Add to dashboard Cite

SummaryThis paper considers multiuser downlink transmission and detection in a multiple input‐multiple output (MIMO) visible light communication (VLC) system. We combine two promising techniques: space‐shift keying (SSK) and optical orthogonal codes (OOCs). Multiuser downlink transmission is realized by allowing each activated LED to transmit user‐specific OOC simultaneously. An OOC despreader is implemented at the front end of each user terminal (UT) to extract the desired signal and mitigate multiuser interference (MUI). The second part of UT receiver aims to extract the index of the corresponding active LED based on maximum likelihood (ML) or zero‐forcing (ZF) algorithm. The figure of merit we used to access the performance of the proposed downlink multiuser SSK system is the average symbol error rate (SER). Comprehensive Monte Carlo simulations have been undertaken for different system setup to evaluate SER at UT receiver. It is demonstrated that for a specified SER, the required SNR for ML‐based detection algorithm is 3 dB less than the ZF detector in the MUI‐free scenario. On the other hand, the ZF detector outperforms ML detector in the case with residual MUI and limited channel state information (CSI). Both algorithms are computationally attractive, hence can be put into practice in multiuser VLC MIMO system.

show abstract

Generalized Spatial Modulation in Indoor Wireless Visible Light Communication

Cited by 66 publications

References 20 publications

Spatial quadrature modulation for visible light communication in indoor environment

Spatial quadrature modulation for visible light communication in indoor environment

Spatial Modulation – A Low Complexity Modulation Technique for Visible Light Communications

Performance analysis in multiuser downlink visible light communication MIMO system using SSK and optical orthogonal codes

Contact Info

Product

Resources

About