Patent ID: 7085985
Filing Date: 2006-08-01
Classification: H03M,H04L

Abstract:
1. A method for determining a plurality of closure symbols that will force an encoder to a predetermined state, the method comprising: assessing a plurality of impulse response states of the encoder; for each impulse response state of the plurality of impulse response states of the encoder, finding a minimum plurality of input symbols that, when applied to the encoder, will force the encoder to the predetermined state; for a data frame comprising a plurality of input symbols that will place the encoder into a particular impulse response state, determining a minimum plurality of encoder state transitions required to force the encoder to the predetermined state; selecting a plurality of closure symbols, from the minimum plurality of input symbols that, when padded to an end of the data frame, will force the encoder to undergo the minimum plurality of encoder state transitions when transitioning from one impulse response state of the plurality of impulse response states to the predetermined state; padding the plurality of closure symbols to the end of the data frame; and encoding the data frame; and wherein the encoding of the data frame forces the encoder to the predetermined state at the end of the data frame.