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Wireless Infrared Communications
TLDR
The use of infrared radiation as a medium for high-speed short-range wireless digital communication, and several modification formats, including on-off keying (OOK), pulse-position modulation (PPM), and subcarrier modulation, are discussed. Expand
Fading correlation and its effect on the capacity of multielement antenna systems
TLDR
It is shown that the fading correlation affects the MEA capacity by modifying the distributions of the gains of these subchannels, which depends on the physical parameters of MEA and the scatterer characteristics. Expand
Free-space optical communication through atmospheric turbulence channels
TLDR
The use of ML detection in spatial diversity reception to reduce the diversity gain penalty caused by correlation between the fading at different receivers is described. Expand
Compensation of Dispersion and Nonlinear Impairments Using Digital Backpropagation
  • E. Ip, J. Kahn
  • Mathematics
  • Journal of Lightwave Technology
  • 15 October 2008
Optical fiber transmission is impacted by linear and nonlinear impairments. We study the use of digital backpropagation (BP) in conjunction with coherent detection to jointly mitigate dispersion andExpand
Simulation of Multipath Impulse Response for Indoor Wireless Optical Channels
TLDR
A recursive method for evaluating the impulse response of an indoor free-space optical channel with Lambertian reflectors, which enables accurate analysis of the effects of multipath dispersion on high-speed indoor optical communication systems. Expand
Capacity scaling in MIMO Wireless systems under correlated fading
TLDR
Results show that empirical capacities converge to the limit capacity predicted from the asymptotic theory even at moderate n = 16, and the assumption of separable transmit/receive correlations via simulations based on a ray-tracing propagation model is analyzed. Expand
Coherent detection in optical fiber systems.
TLDR
This work reviews detection methods, including noncoherent, differentially coherent, and coherent detection, as well as a hybrid method, and compares modulation methods encoding information in various degrees of freedom (DOF). Expand
Feedforward Carrier Recovery for Coherent Optical Communications
  • E. Ip, J. Kahn
  • Mathematics
  • Journal of Lightwave Technology
  • 4 September 2007
We study a carrier-synchronization scheme for coherent optical communications that uses a feedforward architecture that can be implemented in digital hardware without a phase-locked loop. We deriveExpand
Multiple-Subcarrier Modulation for Nondirected Wireless Infrared Communication
TLDR
It is found that MSM schemes can allow operation at higher data rates than single-carrier modulation schemes without equalization and can be more bandwidth-efficient and also can provide a simple and flexible method for multiple access to the channel. Expand
Analysis of infrared wireless links employing multibeam transmitters and imaging diversity receivers
TLDR
This paper quantifies link performance in terms of the transmitter power required to achieve a bit error rate (BER) not exceeding 10/sup -9/ with 95% probability and discusses the use of multibeam transmitters and imaging receivers to implement space-division multiple access (SDMA). Expand
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