Wireless Side-Channels in MIMO Full-Duplex Systems
| dc.contributor.advisor | Sabharwal, Ashutosh | en_US |
| dc.creator | Bai, Jingwen | en_US |
| dc.date.accessioned | 2017-08-07T17:45:20Z | en_US |
| dc.date.available | 2017-08-07T17:45:20Z | en_US |
| dc.date.created | 2016-05 | en_US |
| dc.date.issued | 2016-04-25 | en_US |
| dc.date.submitted | May 2016 | en_US |
| dc.date.updated | 2017-08-07T17:45:20Z | en_US |
| dc.description.abstract | In this thesis, we propose a new approach for enhanced interference management via wireless side-channels in advanced wireless systems such as MIMO full-duplex systems. The rise of multiple radio interfaces, such as WiFi (operating in unlicensed ISM bands) and cellular (operating in licensed bands), with near-default inclusion in smartphones, allows for a new use of the ISM bands to manage interference in cellular bands, by creating wireless “side-channels” between mobile users. In a multi-user MIMO full-duplex system, an in-band full-duplex base station (BS) with multiple antennas communicates with multiple up- and downlink users in the same time-frequency slot. We characterize the impact of side- channels in managing interference from uplink users to downlink users in such MIMO full-duplex system. First, we experimentally quantify the likelihood of establishing ISM side-channels between smartphones in WiFi-free areas such as highways. Next, we study a side-channel assisted two-user MIMO full-duplex sys- tem and characterize its generalized degrees-of-freedom and diversity- multiplexing tradeoff. For such a system, we show that the optimal perfor- mance is achieved by our proposed vector bin-and-cancel strategy which leverages Han-Kobayashi message splitting. Then, we study a side-channel assisted multi-user MIMO full-duplex system from a cross-layer protocol design perspective. Our protocol design integrates automatic repeat request (ARQ) at the medium access control (MAC) layer with enhanced interference management via side-channels at the physical layer (PHY). Our proposed joint PHY-MAC protocols exploit the ARQ information offered by the MAC layer to reduce the data retransmission time and improve system goodput. Finally, we study a multi-cell multi-user MIMO full-duplex system, where new forms of intra- and inter-cell interference appear due to the full-duplex operation. We characterize the up- and downlink ergodic achievable rates for the case of linear precoders and receivers. The rate analysis includes practical constraints such as imperfect full-duplex radio chains, channel estimation error, training overhead and pilot contamination. We show that with large antenna arrays at base-stations, the gains from full-duplex are available at the network level despite the increased interference in the full-duplex networks. Moreover, full-duplex networks can use fewer antennas to achieve spectral efficiency gain over the half-duplex counterparts. We also demonstrate that under realistic multi-cell MIMO full-duplex network scenarios, side-channels are effective in significantly improving the spectral efficiency of cell-edge users. | en_US |
| dc.format.mimetype | application/pdf | en_US |
| dc.identifier.citation | Bai, Jingwen. "Wireless Side-Channels in MIMO Full-Duplex Systems." (2016) Diss., Rice University. <a href="https://hdl.handle.net/1911/96607">https://hdl.handle.net/1911/96607</a>. | en_US |
| dc.identifier.uri | https://hdl.handle.net/1911/96607 | en_US |
| dc.language.iso | eng | en_US |
| dc.rights | Copyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder. | en_US |
| dc.subject | MIMO | en_US |
| dc.subject | Wireless side-channels | en_US |
| dc.subject | Full-duplex | en_US |
| dc.subject | Multi-cell networks | en_US |
| dc.title | Wireless Side-Channels in MIMO Full-Duplex Systems | en_US |
| dc.type | Thesis | en_US |
| dc.type.material | Text | en_US |
| thesis.degree.department | Electrical and Computer Engineering | en_US |
| thesis.degree.discipline | Engineering | en_US |
| thesis.degree.grantor | Rice University | en_US |
| thesis.degree.level | Doctoral | en_US |
| thesis.degree.name | Doctor of Philosophy | en_US |
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