1. A method for decoding digital data received by a correspondent device over a communication channel, the data including a component corresponding to a plurality of values unknown to the correspondent device and a component corresponding to one or more values known a priority the correspondent device, at least one of the one or more values known a priori by the correspondent device stored in memory of the correspondent device, the method comprising: (a) the correspondent device retrieving from memory the at least one of the one or more known values; (b) the correspondent device applying a statistical measure using the at least one of the one or more known values to estimate the location of the component corresponding to the one or more known values; and (c) a decoder of the correspondent device using the one or more known values and the estimated location of the component corresponding to the one or more known values in decoding the data.