Achieving single channel, full duplex wireless communication


This paper discusses the design of a single channel full-duplex wireless transceiver. The design uses a combination of RF and baseband techniques to achieve full-duplexing with minimal effect on link reliability. Experiments on real nodes show the full-duplex prototype achieves median performance that is within 8% of an ideal full-duplexing system. This paper presents <i>Antenna Cancellation</i>, a novel technique for self-interference cancellation. In conjunction with existing RF interference cancellation and digital baseband interference cancellation, antenna cancellation achieves the amount of self-interference cancellation required for full-duplex operation. The paper also discusses potential MAC and network gains with full-duplexing. It suggests ways in which a full-duplex system can solve some important problems with existing wireless systems including hidden terminals, loss of throughput due to congestion, and large end-to-end delays.

DOI: 10.1145/1859995.1859997
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@inproceedings{Choi2010AchievingSC, title={Achieving single channel, full duplex wireless communication}, author={Jung Il Choi and Mayank Jain and Kannan Srinivasan and Philip Levis and Sachin Katti}, booktitle={MobiCom}, year={2010} }