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Improving communication reliability by use of an intermittent feedback channel

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1 Author(s)

This paper describes and analyzes a feedback communication scheme where the feedback channel is used only to inform the transmitter, at specified times (prior to a final decision), which message the receiver considers most likely. The feedback information is used by the transmitter to modify its transmission according to a rule known also to the receiver. When orthogonal signals are used and only an average transmitter power constraint is imposed, the error probability can be made to decrease in an N -fold exponential manner with increasing

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Information Theory, IEEE Transactions on  (Volume:15 ,  Issue: 1 )