A Signal-Space Distance Measure for Nondispersive Optical Fiber

Optimal input signal distribution and per-sample mutual information for nondispersive nonlinear optical fiber channel in large SNR limit

We consider a model nondispersive nonlinear optical fiber channel with additive white Gaussian noise at large SNR (signalto-noise ratio) in the intermediate power region. Using Feynman path-integral technique we for the first time find the optimal input signal distribution maximizing the channel’s per-sample mutual information. The finding of the optimal input signal distribution allows us to i...

A new Mahalanobis distance measure for clustering of fiber tracts

INTRODUCTION Data analysis in Diffusion Tensor Magnetic Resonance Imaging (DT-MRI) is highly sophisticated and can be thought of as a “pipeline” of closely connected processing and modeling steps. Cluster analysis of the orientation of the fiber direction and fiber tracts is typically carried on the major eigenvector. This type of cluster analysis is also important in reducing sorting bias in t...

Revision of a fuzzy distance measure

Signal Space Detection for DVD Optical Recording

A signal space detector (SSD) based on a single hyperplane is proposed which offers nearly the same performance as the fixed delay tree search with decision feedback (FDTS/DF) for the digital versatile disk (DVD) channel. The FDTS/DF detector with a reasonable decision delay performs almost as well as the optimal maximum likelihood sequence detector (MLSD) due to the EFMplus modulation code tha...

Optical Fiber Delay-Line Signal Processing

Single-mode optical fiber is an attractive delay medium for processing microwave frequency signals due to its extremely low loss ( <0.1 dB/ps) and large available time-bandwidth product (in excess of 105 ). Recent progress in the efficient tapping of light from single-mode fibers has made it possible to construct recirculating and nonrecirculating (tapped) delay-line structures that can perform...