Patent ID: 8898547
Filing Date: 2014-11-25
Classification: H03M

Abstract:
1. An apparatus comprising: a metric generator, coupled to the decoder, that is operative to calculate a plurality of metrics for a respective symbol of a signal received from a communication channel based on one of a first plurality of rate controls or one of a second plurality of rate controls that corresponds to the respective symbol; a decoder, that is coupled to the metric generator, that is configured to decode the signal using the first plurality of rate controls and the second plurality of rate controls to generate estimates of information bits encoded within symbols of the signal including using the plurality of metrics to decode the respective symbol; a rate control sequencer, coupled to the decoder, that is configured to provide the first plurality of rate controls to the decoder, wherein: the decoder firstly is configured to decode a first portion of the signal using the first plurality of rate controls such that each respective symbol within the first portion of the signal is decoded based on a respective one of the first plurality of rate controls; based on a change of a signal to noise ratio (SNR) corresponding to the communication channel, the rate control sequencer is configured to provide the second plurality of rate controls to the decoder; and the decoder secondly is configured to decode a second portion of the signal that follows the first portion of the signal using the second plurality of rate controls such that each respective symbol within the second portion of the signal is decoded based on a respective one of the second plurality of rate controls.