TIT
2002
13 years 4 months ago
2002
We consider a two-dimensional problem of positron emission tomography where the random mechanism of the generation of the tomographic data is modeled by Poisson processes. The goa...
TIT
2002
13 years 4 months ago
2002
We consider Gallager's soft decoding (belief propagation) algorithm for decoding low density parity check (LDPC) codes, when applied to an arbitrary binary-input symmetric-ou...
TIT
2002
13 years 4 months ago
2002
We derive upper bounds on the rate of low density parity check (LDPC) codes for which reliable communication is achievable. We first generalize Gallager's bound to a general ...
TIT
2002
13 years 4 months ago
2002
TIT
2002
13 years 4 months ago
2002
We present a framework for iterative multiuser joint decoding of code-division multiple-access (CDMA) signals, based on the factor-graph representation and on the sum-product algor...
TIT
2002
13 years 4 months ago
2002
Abstract--We adapt methods originally developed in information and coding theory to solve some testing problems. The efficiency of two-stage pool testing of items is characterized ...
TIT
2002
13 years 4 months ago
2002
The entanglement-assisted classical capacity of a noisy quantum channel ( ) is the amount of information per channel use that can be sent over the channel in the limit of many uses...
TIT
2002
13 years 4 months ago
2002
TIT
2002
13 years 4 months ago
2002
We derive the Gilbert
TIT
2002
13 years 4 months ago
2002
Abstract--Minimum distances, distance distributions, and error exponents on a binary-symmetric channel (BSC) are given for typical codes from Shannon's random code ensemble an...