Patent ID: 6278754
Filing Date: 2001-08-21
Classification: H04L

Abstract:
In an asynchronous communication system incorporating a detection-transition sample estimation scheme in order to identify symbols in respective symbol intervals of an input data signal, a demodulator circuit comprising:an initial detection sample estimation circuit which receives said input data signal and produces estimated detection samples based on a plurality of samples within each symbol interval and in accordance with at least one detection control signal;a transition sample estimation circuit which receives said input data signal and produces estimated transition samples each based on a plurality of samples of said input data signal in accordance with at least one transition control signal; anda control signal generator for generating said detection and transition control signals in accordance with classifications of said detection and transition samples as to positions of the detection and transition samples within said symbol intervals, said control signal generator classifying certain of said detection samples as being prior to a reference position in a symbol interval and classifying certain of said detection samples as being subsequent to said reference position, and ensuring that every sample immediately following a sample classified as prior to said reference position is classified as subsequent to said reference position.