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On Channel Output Feedback in Deterministic Interference Channels
Date
2009-01-01
Author
Sahai, Achaleshwar
Aggarwal, Vaneet
Yüksel Turgut, Ayşe Melda
Sabharwal, Ashutosh
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In this paper, we study the effect of channel output feedback on the sum capacity in a two-user symmetric deterministic interference channel. We find that having a single feedback link from one of the receivers to its own transmitter results in the same sum capacity as having a total of 4 feedback links from both the receivers to both the transmitters. Hence, from the sum capacity point of view, the three additional feedback links are not helpful. We also consider a half-duplex feedback model, where the forward and the feedback resources are symmetric and time-shared. Surprisingly, we find that there is no gain in sum-capacity with feedback in a half-duplex feedback model, when interference links have more capacity than direct links.
URI
https://hdl.handle.net/11511/96471
DOI
https://doi.org/10.1109/itw.2009.5351427
Conference Name
IEEE Information Theory Workshop (ITW)
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Department of Electrical and Electronics Engineering, Conference / Seminar
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A. Sahai, V. Aggarwal, A. M. Yüksel Turgut, and A. Sabharwal, “On Channel Output Feedback in Deterministic Interference Channels,” presented at the IEEE Information Theory Workshop (ITW), Taormina, İtalya, 2009, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/96471.