Alamouti-type STBC for subcarrier intensity modulated wireless optical communications

Song, Xuegui; Cheng, Julian

doi:10.1109/glocom.2012.6503563

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…However, the authors did not study the truncation error of their series solutions, and they only considered subcarrier BPSK over the Gamma-Gamma channels. Recently, we investigated the error rate performance of subcarrier intensity-modulated MIMO OWC systems employing both Alamouti code and repetition code, and the preliminary results were presented in [19] and [20]. In this paper, we study the error rate performance of subcarrier intensity-modulated MIMO OWC systems employing both the Alamouti code and repetition code over the Gamma-Gamma channels.…”

Section: Introductionmentioning

confidence: 99%

Subcarrier Intensity Modulated MIMO Optical Communications in Atmospheric Turbulence

Song¹,

Cheng²

2013

J. Opt. Commun. Netw.

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We investigate spatial diversity techniques for subcarrier phase-shift keying (PSK)-modulated optical wireless communication links over the Gamma-Gamma channels. Both repetition code and the Alamouti-type orthogonal space-time block code (OSTBC) are considered. Highly accurate series error rate expressions are derived by using a moment generating function approach with a series expansion of the modified Bessel function. Truncation error analyses and asymptotic error rate analyses are also presented. Our asymptotic analyses show that the diversity order of the studied system depends only on the effective number of small-scale cells of the scattering process in the atmosphere. Our performance analyses confirm that the repetition code outperforms OSTBC for subcarrier PSK-based systems over the Gamma-Gamma channels. The asymptotic performance loss of the Alamouti-coded system with respect to the repetitioncoded system is also quantified analytically.

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Section: Introductionmentioning

confidence: 99%

Subcarrier Intensity Modulated MIMO Optical Communications in Atmospheric Turbulence

Song¹,

Cheng²

2013

J. Opt. Commun. Netw.

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“…Among the spatial diversity methods that have received particular interest, we can mention: optical spatial modulation (OSM), 27,28 repetition coding (RC), 7,26,[29][30][31][32] and optical space time codes (OSTC). [33][34][35][36][37] However, all of these works assume a constructive combination of the transmitted beams at the receiver. Different optical paths, separated by at least the coherence length of turbulence (which is usually smaller than a few tenths of metre), propagate through media having different characteristics; hence, different optical waves are received with a different amplitude and phase at the receiver.…”

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confidence: 99%

Ground‐to‐GEO optical feeder links for very high throughput satellite networks: Accent on diversity techniques

Mengali

Kourogiorgas

Lyras

et al. 2020

Satell Commun Network

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This paper studies the use of optical feeder links in very high throughput satellites (VHTS) networks with emphasis on gateway diversity techniques to mitigate the inherent propagation losses in optical frequencies. Focusing on a GEO scenario, the paper considers a system-wide approach investigating various challenges of optical feeder links. These include transmission schemes amenable for transparent on-board processing, optical channel models taking into account blockage by clouds and fading caused by atmospheric turbulence in addition to complexity of on-board and on-ground processing. The channel models are then used to dimension the ground segment towards ensuring a given availability percentage (e.g., 99.9%). The channel model and payload complexity further influence the choice of link layer techniques used for counteracting fading due to atmospheric turbulence in the absence of blockage. An elaborate end-to-end simulator incorporating the proposed channel models capturing the nuances of various processing blocks like optical-electrical conversion is developed. The system performance results provide interesting insights and a framework for assessing the feasibility and advantages of optical feeder links in VHTS systems. K E Y W O R D Sanalog and digital transparent payloads, channel models, GEO networks, microdiversity and macrodiversity, optical feeder links, optical ground station network selection, optical received time series, optical SNR | INTRODUCTIONA key challenge towards future generation very high throughput satellites (VHTS) is the limited spectrum of about 2 GHz available in the Ka band (20/30 GHz). A potential solution for resolving this issue could be to move the feeder links from the Ka band to the Q/V band (40/50 GHz) 1-4 or even to the W band (70/80 GHz) 5 where bandwidths of up to 5 GHz are available. While this allows for the use of radio frequency (RF) domain expertise, the bandwidth available is limited compared with requirement estimates and the spectrum is also solicited in the emerging 5G paradigm. 6 Another revolutionary solution is to move the feeder link from RF frequencies to optical frequencies. [7][8][9] Both these approaches are challenging due to the attenuation by atmospheric phenomena (e.g., rain and clouds) whose severity increases with the frequency. In both cases, a network of multiple gateways with smart switching capabilities is thus envisaged. 10,11 While RF at high frequencies is less impaired than the optical counterpart, larger number of gateways is nonetheless required to achieve very high throughputs due to the limited available bandwidth per

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Alamouti Code Generator in Optical Domain Using Mach–Zehnder Interferometer

Kumar

Singh

Kumar

2020

Lecture Notes in Electrical Engineering

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Alamouti-type STBC for subcarrier intensity modulated wireless optical communications

Cited by 7 publications

References 22 publications

Subcarrier Intensity Modulated MIMO Optical Communications in Atmospheric Turbulence

Subcarrier Intensity Modulated MIMO Optical Communications in Atmospheric Turbulence

Ground‐to‐GEO optical feeder links for very high throughput satellite networks: Accent on diversity techniques

Alamouti Code Generator in Optical Domain Using Mach–Zehnder Interferometer

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