Patent ID: 8542724
Filing Date: 2013-09-24
Classification: H04B,H04L

Abstract:
1. A method for underwater acoustic telemetry utilizing an iterative joint minimum mean square error equalizer and turbo decoder, said method comprising the steps of: processing input signals with a decision feedback equalizer; generating a coded output comprising an estimated symbol sequence; feeding the generated coded output to a turbo decoder with the turbo decoder outside of and separate from the decision feedback equalizer; feeding the estimated symbol sequence into a feedback portion of the equalizer; decoding the generated coded output with the turbo decoder; generating soft decoder output values; feeding the generated soft decoder output values to the feedback portion of the decision feedback equalizer; combining the soft decoder output values with the estimated symbol sequence; and using the combined soft decoder output values and estimated symbol sequence in a symbol-by-symbol detector to make symbol decisions in the decision feedback equalizer.