A Spatial Self-Interference Nullification Method for Full Duplex Amplify-And-Forward MIMO Relays

In full duplex amplify-and-forward (FD-AF) relays, self-interference from the transmit side causes a major problem hindering its commercial spread. To alleviate the front-end saturation problem, we propose a spatial self-interference nullification method employing extra transmit antennas in FD-AF mu...

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Bibliographic Details
Main Authors: Byungjin Chun, Lee, Yong H
Format: Conference Proceeding
Language:English
Subjects:
Capacity planning
Channel estimation
High definition video
Interference channels
MIMO
Mobile antennas
Receiving antennas
Relays
Stability analysis
Transmitting antennas
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Summary:In full duplex amplify-and-forward (FD-AF) relays, self-interference from the transmit side causes a major problem hindering its commercial spread. To alleviate the front-end saturation problem, we propose a spatial self-interference nullification method employing extra transmit antennas in FD-AF multiple-input-multiple-output (MIMO) relay systems, and analyze characteristics of the proposed system when there exist channel estimation errors. In particular, the probability of relay stability is derived, and the capacity of the relay is analyzed with zero delay assumption. The results indicate that excessive channel estimation errors drive FD-AF relay into unstable modes and cause capacity reduction.
ISSN:1525-3511
1558-2612
DOI:10.1109/WCNC.2010.5506436