Encoder-Assisted Communications over Additive Noise Channels
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Date
2020-11
Publication Type
Journal Article
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yes
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Abstract
A coding technique that is based on flash helping is proposed for communicating over additive noise channels where a helper observes the noise and can describe it to the encoder over a noise-free rate-limited bit pipe. The technique is applicable irrespective of whether the helper observes the noise causally or noncausally. On the single-user channel of general noise, the rate it achieves is the sum of the channel’s capacity without a helper and the rate of the bit pipe. For Gaussian noise and under an average-power constraint, it is optimal. Analogous results are derived for the additive noise multiple-access channel and the single-user Exponential channel. The approach is applicable also in some (noncausal) discrete settings, as demonstrated on the discrete modulo-additive noise channel.
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published
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Journal / series
Volume
66 (11)
Pages / Article No.
6607 - 6616
Publisher
IEEE
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Edition / version
Methods
Software
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Date collected
Date created
Subject
Additive noise; exponential channel; gaussian noise; helper; modulo-additive noise; multiple-access channel
Organisational unit
03529 - Lapidoth, Amos / Lapidoth, Amos