The Gaussian free space optical MIMO channel with Q-ary pulse position modulation

Letzepis, Nick; Holland, Ian; Cowley, William G.

doi:10.1109/twc.2008.061002

Cited by 99 publications

(54 citation statements)

References 28 publications

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“…Interestingly, the results expressed in Eqs. (10) and (12) indicate that, to achieve the same rate as the MRC combiner, the SC combiner needs an extra power (in dB) equal to ( )…”

Section: Outage Capacity Numerical Results and Comparisonsmentioning

confidence: 99%

“…Turbulence-induced random fluctuations are a slow time-varying process, with a coherence time on the order of milliseconds, and it is therefore appropriate to analyze the outage probability of the channel. To some extent, this has been done in the case of directdetection receivers [5][6][7][8][9][10][11][12]. In these works, the outage probability and capacity of the atmospheric channel is analyzed for ideal (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Capacity of coherent free-space optical links using diversity-combining techniques

Belmonte

Kahn

2009

Opt. Express

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Abstract:We study the performance of diversity combining techniques applied to synchronous laser communication through the turbulent atmosphere. We assume that a single information-bearing signal is transmitted over two or more statistically independent fading channels, and that the multiple replicas are combined at the receiver to improve detection efficiency. We consider the effects of log-normal amplitude fluctuations and Gaussian phase fluctuations, in addition to local oscillator shot noise. We study the effect of various parameters, including the ratio of receiver aperture diameter to wavefront coherence diameter, the scintillation index, and the number of independent diversity branches combined at the receiver. We consider both maximal-ratio combining (MRC) and selective combining (SC) diversity schemes. We derive expressions for the outage Shannon capacity, thus placing upper bounds on the spectral efficiency achievable using these techniques. ©2009 Optical Society of America

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“…Interestingly, the results expressed in Eqs. (10) and (12) indicate that, to achieve the same rate as the MRC combiner, the SC combiner needs an extra power (in dB) equal to ( )…”

Section: Outage Capacity Numerical Results and Comparisonsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Capacity of coherent free-space optical links using diversity-combining techniques

Belmonte

Kahn

2009

Opt. Express

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“…It is pointed out that the BER of OOK modulation is determined by both the turbulence level and the fixed threshold, and, therefore, can not be made arbitrarily small in the presence of atmospheric turbulence even when the SNR is asymptotically large. PPM modulation has been proposed as an error-floor-free alternative to the OOK modulation [37]- [39]. However, PPM modulation needs a complex transceiver design because of the tight synchronization requirements, and it also suffers from a poor bandwidth efficiency.…”

Section: Literature Reviewmentioning

confidence: 99%

Terrestrial Coherent Free-Space Optical Communication Systems

Niu¹,

Cheng²,

Holzman³

2012

Optical Communication

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“…Nevertheless, the levels of illumination specified for occupation ensure that a very high SNR is available. The availability of a large number of high SNR channels with sufficient bandwidth makes MIMO techniques a promising approach both using as a diversity and a multiplexing [3] . The number of transmitter and receiver are much more than the current RF MIMO system, which provides a large number of degrees of freedom by enabling the multiplexing gains over the multiple channels.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Performance Analysis of Spatial Multiplexing in MIMO Based Visible Light Communication System

Mondal¹,

Saha

Jang³

2013

The Journal of Korean Institute of Communications and Informati

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BSTRACTVisible light communication (VLC) is a rapidly growing area of research and applications, due to the potential and predicted high efficiency of bandwidth. One of the key challenges in VLC technology is the choice of devices which are going to be deployed VLC features. Smartphone rationally uses the most widely deployed visible light sensor i.e. image sensor in camera, which could be used to receive the intensity modulated data.Image sensor based VLC system would be the most deployable scenario but initially the capacity was not much attractive compared with photodetector based VLC system. Here, the spatial multiplexing is proposed in MIMO based VLC system to increase the system capacity by utilizing the property of spatial separation of optical light sources in smartphone's camera module. The active pixels of imaging plane act as the multiple receivers which could be able to use on MIMO spatial multiplexing to enhance the system performance.

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The Gaussian free space optical MIMO channel with Q-ary pulse position modulation

Cited by 99 publications

References 28 publications

Capacity of coherent free-space optical links using diversity-combining techniques

Capacity of coherent free-space optical links using diversity-combining techniques

Terrestrial Coherent Free-Space Optical Communication Systems

Performance Analysis of Spatial Multiplexing in MIMO Based Visible Light Communication System

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