Power Adaptive Feedback Communication Over an Additive Individual Noise Sequence Channel

Date Added: Aug 2009
Format: PDF

The authors consider a real-valued additive channel with an individual unknown noise sequence. They present a simple sequential communication scheme based on the celebrated Schalkwijk-Kailath scheme, which varies the transmit power according to the power of the sequence, so that asymptotically the relation between the SNR and the rate matches the Gaussian channel capacity R ~ 1 2 log(1 + SNR) for almost every noise sequence. They address the problem of communicating with feedback over the channel yn = xn + sn where the noise sequence sn can be any individual unknown sequence with arbitrary power.