Error Performance of Generalised Space Shift Keying for Indoor Visible Light Communications

Popoola, Wasiu O.; Poves, E.; Haas, Harald

doi:10.1109/tcomm.2013.022713.120501

Cited by 116 publications

(71 citation statements)

References 24 publications

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“…The GSSK modulation scheme can be implemented by activating a fixed number of sources, N a ,(1<N a < N t )in any symbol duration and varying the indices of the activated sources based on the bits contained in the symbol to be transmitted [13]. The scheme can also be implemented by varying both the number and the indices of the activated sources based on bits of the data symbol to be transmitted [8,14,15]. Considering the latter implementation of GSSK, a total of N t bits are transmitted per data symbol as against log 2 (N t ) in OSSK.…”

Section: Variants Of Optical Spatial Modulationmentioning

confidence: 99%

“…As described in Ref. [8], the number and position of ones (1s) in the bits of the symbol to be transmitted determine the number and the indices of the LEDs that will be activated. During a symbol duration, each activated LED transmits a return-to-zero (RZ) pulse of fixed but predefined width and a peak power P t .…”

Section: Variants Of Optical Spatial Modulationmentioning

confidence: 99%

“…(26) indicates that for a given SNR, the error performance of SPPM strongly depends on the individual channel path gain of each transmitter-receiver link as well as the difference between these channel gain values. The error performance plots for different system configurations are shown in Figure 6.ForthecaseofN r =1,N t = [2,4], and L = [2,8], the achieved symbol error rate (SER) is plotted against the SNR per bit γ b = γ s /M. To validate the analysis, simulation results are also included.…”

Section: Error Performance Analysis Of Sppmmentioning

confidence: 99%

“…[5] by activating multiple LEDs during each symbol's duration in order to increase the number of bits transmitted at a time instance. The use of optical space shift keying (OSSK) [6], spatial pulse amplitude modulation (S-PAM) [7], and generalised space shift keying (GSSK) [8] to boost VLC spectral efficiency using SM has equally been investigated.…”

Section: Introductionmentioning

confidence: 99%

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

Olanrewaju¹,

Ogunkoya²,

Popoola³

2017

Visible Light Communications

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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).

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Section: Variants Of Optical Spatial Modulationmentioning

confidence: 99%

Section: Variants Of Optical Spatial Modulationmentioning

confidence: 99%

Section: Error Performance Analysis Of Sppmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Olanrewaju¹,

Ogunkoya²,

Popoola³

2017

Visible Light Communications

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“…For ON-OFF keying (OOK) modulation, the ratio of the "ON" time to "OFF" time of the signal is adjusted in a transmission data frame to meet the dimming requirements, resulting in the design of a scheme maintaining the Hamming weights associated with the dimming requirement. Pulse-width modulation (PWM) is applied for dimming support [19][20][21], and can also be superposed with OOK and pulse-position modulation (PPM) [22,23]. These schemes are simple, but they either produce marginal rate enhancement or are vulnerable to noise.…”

Section: Introductionmentioning

confidence: 99%

Optimal Signal Amplitude of Orthogonal Frequency-Division Multiplexing Systems in Dimmable Visible Light Communications

Yun

Lee

Ahn

et al. 2014

Journal of the Optical Society of Korea

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Visible light communications (VLC) using the intensity modulation of light-emitting diodes (LEDs) provides a new communication medium to overcome the shortage of radio spectrum, and allows reuse of LED lighting infrastructures. Orthogonal frequency-division multiplexing (OFDM) was introduced to VLC for its merits in mitigating the fading effects resulting from delay spread, and in avoiding low-frequency ambient interference. Noise and clipping are two major factors that degrade the performance of OFDM in VLC. A larger signal easily overcomes noise, but experiences impairment by clipping. Therefore, degradation due to clipping has a trade-off relationship with that due to noise, depending on the signal amplitude of OFDM. In this paper, the optimal signal amplitude in the trade-off is obtained by simulation when the dimming and LED intensity are given. The former indicates a user's requirement for lighting, and the latter represents the channel quality. The required LED intensity-to-noise ratio, as the channel quality that guarantees dimming as well as an adequate bit-error rate (BER), is also discussed.

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

Wu,

Chen

2024

Int J Communication

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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.

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Error Performance of Generalised Space Shift Keying for Indoor Visible Light Communications

Cited by 116 publications

References 24 publications

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

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

Optimal Signal Amplitude of Orthogonal Frequency-Division Multiplexing Systems in Dimmable Visible Light Communications

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

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