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Ergodic Interference Alignment With Delayed Feedback

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2 Author(s)
Kang, M.G. ; Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), ; Choi, W.

We propose new ergodic interference alignment techniques for $K$-user interference channels with delayed feedback. Two delayed feedback scenarios are considered—delayed channel information at transmitter (CIT) and delayed output feedback. It is proved that the proposed techniques achieve total $2K/(K+2)$ DoF which is higher than that by the retrospective interference alignment for the delayed feedback scenarios.

Published in:

Signal Processing Letters, IEEE  (Volume:20 ,  Issue: 5 )