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Degenerate Detector and Associated Code for a PR4 Channel

IP.com Disclosure Number: IPCOM000065337D
Original Publication Date: 1985-Nov-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Hartley, JD Martin, GN [+details]

Abstract

Degenerate Detector A detector examines the output of a channel and deduces the input. A maximum-likelihood detector assumes initial probability distribution for the possible inputs, modifies this distribution in the light of the output received, and then chooses the most probable input. Most detectors assume that the possible inputs are equiprobable. A degenerate detector is one with a simplified design, and which relies on an input restriction to ensure that the simplification does not increase the probability of detection error. PR4 Channel A PR4 channel fed with input designated by the string ... 0 0 0 1 0 0 0 ... yields an output identified by the samples ... 0 0 1 0 -1 0 0 ... Linear combinations of shifts of this input yield the corresponding linear combinations of shifts of this output.