Patent ID: 6282251
Filing Date: 2001-08-28
Classification: H03M,H04L

Abstract:
A method of detecting an input signal received over a plurality of time periods and corresponding to one of a plurality of states during each time period, the states being connected by branches, and the input signal having a value that is changeable from one of the plurality of time periods to a next of the plurality of time periods, the method comprising:detecting a first merged state in which the branches during a first merge time period lead to only one of the plurality of states;determining a metric for each of the plurality of states for each time period, the metric being based on an estimated value of noise in the input signal during a present time period and an estimated value of noise in the input signal during a previous time period and on the plurality of branches connected to the state for which the metric is being determined;identifying a likely branch leading to each of the plurality of states based on the metric determined;detecting a second merged state in which the branches during a second merge time period lead to only one of the plurality of states; anddetermining the value of the input signal for each time period between the first and second merged states based on the likely branches leading between the first and second merged states.