Patent ID: 6760574
Filing Date: 2004-07-06
Classification: H04L

Abstract:
A method for detecting an input signal at a transceiver of a communication system, the method comprising:receiving the input signal; storing consecutive samples of the input signal, each stored sample corresponding to a specific indexed location; deriving an envelope signal from the input signal; characterizing actual arrival of the input signal by applying the envelope signal to a number of predetermined sequential threshold levels including a first threshold level; initiating a time count in response to the first threshold level being crossed by the envelope signal; storing a corresponding time count for each threshold level that is crossed by the envelope signal; indicating receipt of the input signal after a predetermined settling time that corresponds to a maximum time count; retrieving the time count corresponding to a last threshold crossed; subtracting the retrieved time count from the maximum time count thereby generating an index that specifies a location storing a sample of the input signal associated with the actual arrival of the input signal; and providing that sample of the input signal as the detected signal thereby compensating for timing misalignment between when receipt of the input signal was indicated and when the input signal actually arrived.