Non-line-of-sight serial relayed link for optical wireless communications

He, Qunfeng; Xu, Zhengyuan; Sadler, Brian M.

doi:10.1109/milcom.2010.5680180

Cited by 31 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There are three main steps involved in the solution to {h n } L n=0 , estimating h based on (16), obtaining the sign indicator κ ij based on (23), and obtaining the LS solution b LS based on (25). The complexity of the above three steps is discussed as follows.…”

Section: Discussion On the Complexitymentioning

confidence: 99%

See 1 more Smart Citation

Estimation of NLOS optical wireless communication channels with laser transmitters

Zhang

Gong

2014

2014 48th Asilomar Conference on Signals, Systems and Computers

Self Cite

View full text Add to dashboard Cite

We propose channel estimation for the optical wireless scattering channel with a Laser Diode transmitter based on sparse pilots. For channel taps {hn} L n=0 , the proposed estimation approach consists of two steps, the estimation of the real part Re(hih * j ) in the first step and the estimation of {hn} L n=0 in the second step. Numerical results show that, compared with conventional channel estimation approach based on second-order moments, the proposed approach shows slight performance gain, and less than one tenth of the computational complexity.

show abstract

Section: Discussion On the Complexitymentioning

confidence: 99%

“…Recall that, in the previous step, the estimates of Re(h i h * i ) and Re(h i h * j ) have been obtained, given by (16). An estimate of |θ i − θ j |, denotes asθ ij for 1 ≤ i < j ≤ L, is given bŷ…”

Section: On Second-order Momentsmentioning

confidence: 99%

Estimation of NLOS optical wireless communication channels with laser transmitters

Zhang

Gong

2014

2014 48th Asilomar Conference on Signals, Systems and Computers

Self Cite

View full text Add to dashboard Cite

show abstract

“…A side-effect of the availability of both very large-area, and very compact sensors is that two different transceiver sizes may be produced: a large, high-powered uncollimated transceiver well suited to vehicles or buildings, and a much smaller low-power unit for humans or small UAVs. Asymmetrical transceiver design uses the direct trade-off between optical transmit power P DT and path loss ξd α (proportional to receiver area) in Equation 1 for fixed data rate (R b , P e ), wavelength ν, and distance d [2]…”

Section: Task 1: Literature Surveymentioning

confidence: 99%

Ultraviolet Communication for Medical Applications

Cross¹

2012

View full text Add to dashboard Cite

In this Phase I SBIR effort, Imaging Systems Technology (IST) demonstrated novel UVC-emitting Plasmashells in a breadboard system for ultraviolet (UV) non-line-of-sight (NLOS) communication for medical battlefield casualty care. UVC Plasma-shells were fabricated and tested as optical emitter components in the solar blind 200-280 nm UVC region, and were compared with a 273 nm UV LED. A survey of state-ofthe-art UVC optical components identified new devices that will make vehicle-mounted and man-portable UV NLOS systems practical by allowing power/area tradeoffs in transceiver design. A breadboard system was built to test a large-area 22 x 22 Plasma-shell transmitter panel that produced 17.6 mW optical power, with a PMT photon-counting receiver. Limited results were available from the breadboard system, however measurements of individual Plasma-shells showed emission of 12 and 24 μW at 253 and 273 nm respectively with potential for much higher output power. Ambient operating temperature was tested up to 100 °C and maximum is predicted to be 137 °C, and lifetime testing to 1050 hours shows no reduction in light output. 15. SUBJECT TERMS 16. SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT 18. NUMBER OF PAGES 19a. NAME OF RESPONSIBLE PERSON a. REPORT

show abstract

“…Recently, optical wireless communication (OWC) has received a lot of interest due to its ultrawide bandwidth and no EM radiation compared to the conventional radio system. As described in the work of Liu et al, in an OWC ad hoc communication system, the optical receiver has to periodically listen to the channel to detect whether the channel is occupied by other users.…”

Section: Introductionmentioning

confidence: 99%

Spectrum sensing in optical wireless communication network

2020

Trans Emerging Tel Tech

View full text Add to dashboard Cite

The main focus of this paper is on the issue of spectrum sensing or channel awareness in an optical wireless scattering communication network. We propose two spectrum sensing algorithms to detect M-ary pulse-position modulation signal under Poisson channel statistic. The first algorithm premises on symbol-by-symbol block processing, in which the photon-counting receiver collects the received photons during a symbol interval and a Neyman-Pearson decision rule is developed to determine the optimum decision threshold, whereas the second algorithm is based on chip-level sequential as well as diversity detection. Performances of both algorithms are extensively analyzed in terms of the detection probability, the false alarm probability, the average detection delay, and the average false alarm run length. Simulation results demonstrate that scheme 2 outperforms scheme 1 under different scenarios. We also analyze the existing algorithm on the considered signal model and verify the effectiveness of the proposed algorithms over existing spectrum sensing algorithm.Trans Emerging Tel Tech. 2020;31:e3716.wileyonlinelibrary.com/journal/ett

show abstract

Non-line-of-sight serial relayed link for optical wireless communications

Cited by 31 publications

References 17 publications

Estimation of NLOS optical wireless communication channels with laser transmitters

Estimation of NLOS optical wireless communication channels with laser transmitters

Ultraviolet Communication for Medical Applications

Spectrum sensing in optical wireless communication network

Contact Info

Product

Resources

About