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Practical, real-time, full duplex wireless
Abstract
This paper presents a full duplex radio design using signal inversion and adaptive cancellation. Signal inversion uses a simple design based on a balanced/unbalanced (Balun) transformer. This new design, unlike prior work, supports wideband and high power systems. In theory, this new design has no limitation on bandwidth or power. In practice, we find that the signal inversion technique alone can cancel at least 45dB across a 40MHz bandwidth. Further, combining signal inversion cancellation with cancellation in the digital domain can reduce self-interference by up to 73dB for a 10MHz OFDM signal. This paper also presents a full duplex medium access control (MAC) design and evaluates it using a testbed of 5 prototype full duplex nodes. Full duplex reduces packet losses due to hidden terminals by up to 88%. Full duplex also mitigates unfair channel allocation in AP-based networks, increasing fairness from 0.85 to 0.98 while improving downlink throughput by 110% and uplink throughput by 15%. These experimental results show that a re- design of the wireless network stack to exploit full duplex capability can result in significant improvements in network performance.
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Citations
Cited by
In-band full-duplex technology: Techniques and systems survey
Kolodziej, K. E., Perry, B. T., & Herd, J. S. (2019) · IEEE Transactions on Microwave Theory and Techniques · doi:10.1109/tmtt.2019.2896561 · Cited by 640
BackFi: High Throughput WiFi Backscatter
Bharadia, D., Joshi, K. R., Kotaru, M., & Katti, S. (2015) · Proceedings of the 2015 ACM Conference on Special Interest Group on Data Communication · doi:10.1145/2785956.2787490 · Cited by 337
Self-citationWidely linear digital self-interference cancellation in direct-conversion full-duplex transceiver
Korpi, D., Anttila, L., Syrjala, V., & Valkama, M. (2014) · IEEE Journal on Selected Areas in Communications · doi:10.1109/jsac.2014.2330093 · Cited by 287
Sharma, S. K., Bogale, T. E., Le, L. B., Chatzinotas, S., Wang, X., & Ottersten, B. (2018) · IEEE Communications Surveys & Tutorials · doi:10.1109/comst.2017.2773628 · Cited by 248
Metadata
- Authors
- Jain, M., Choi, J. I., Kim, T., Bharadia, D., Seth, S., Srinivasan, K., Levis, P., Katti, S., & Sinha, P.
- Venue
- Proceedings of the 17th annual international conference on Mobile computing and networking
- Publisher
- ACM
- Published
- 2011-09-19
- Pages
- 301-312
- ISSN
- 1543-5679 (ISSN-L)
- OpenAlex
- W2128938148
- Cited by
- 1,367
- References
- 0
- FWCI
- 140.92
- Type
- conference paper
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Practical, real-time, full duplex wireless. https://app.cochat.ai/papers/10.1145/2030613.2030647
- The paper
- Jain, M., Choi, J. I., Kim, T., Bharadia, D., Seth, S., Srinivasan, K., Levis, P., Katti, S., & Sinha, P. (2011). Practical, real-time, full duplex wireless. Proceedings of the 17th annual international conference on Mobile computing and networking. https://doi.org/10.1145/2030613.2030647
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
