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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Citation Formats

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.