| 1 | = Passive Self-Interference Suppression for Full-Duplex Infrastructure Nodes = |
| 2 | Submitted to ''IEEE Transactions on Wireless Communication'' - January 2013 |
| 3 | |
| 4 | Authors: Evan Everett, Achaleshwar Sahai, Ashutosh Sabharwal |
| 5 | |
| 6 | == Abstract == |
| 7 | Recent research results have demonstrated the feasibility of full-duplex wireless communication for short-range links. Although the focus of the previous works has been active cancellation of the self-interference signal, a majority of the overall self-interference suppression is often due to passive suppression, i.e., isolation of the transmit and receive antennas. We present a measurement-based study of the capabilities and limitations of three key mechanisms for passive self-interference suppression: directional isolation, absorptive shielding, and cross-polarization. The study demonstrates that more than 70 dB of passive suppression can be achieved in certain environments, but also establishes two results on the limitations of passive suppression: (1) environmental reflections limit the amount of passive suppression that can be achieved, and (2) passive suppression, in general, increases the frequency selectivity of the residual self-interference signal. These results suggest two design implications: (1) deployments of full-duplex infrastructure nodes should minimize near-antenna reflectors, and (2) active cancellation in concatenation with passive suppression should employ higher-order filters or per-subcarrier cancellation. |
| 8 | |
| 9 | == Links == |
| 10 | * [http://arxiv.org/abs/1302.2185 Download] |
| 11 | * See on [http://arxiv.org/abs/1302.2185 arXiv] |
| 12 | |
| 13 | |
| 14 | == Citation == |
| 15 | {{{ |
| 16 | @unpublished{Everett2013PassiveSuppressionFD, |
| 17 | Author = {Evan Everett and Achaleshwar Sahai and Ashutosh Sabharwal}, |
| 18 | Date-Modified = {2013-02-17 17:35:49 -0600}, |
| 19 | Keywords = {full-duplex}, |
| 20 | Month = {January}, |
| 21 | Note = {Submitted to \emph{IEEE Transactions on Wireless Communication}}, |
| 22 | Title = {Passive Self-Interference Suppression for Full-Duplex Infrastructure Nodes}, |
| 23 | Url = {http://arxiv.org/abs/1302.2185}, |
| 24 | Year = {2013}} |
| 25 | }}} |