Iterative joint minimum mean square error decision feedback equalizer and turbo decoder

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.