TY - GEN
T1 - Practical, real-time, full duplex wireless
AU - Jain, Mayank
AU - Choi, Jung Il
AU - Kim, Taemin
AU - Bharadia, Dinesh
AU - Seth, Siddharth
AU - Srinivasan, Kannan
AU - Levis, Philip
AU - Katti, Sachin
AU - Sinha, Prasun
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by generous gifts from DoCoMo Capital,the National Science Foundation under grants #0832820, #0831163,#0846014 and #0546630, the King Abdullah University of Scienceand Technology (KAUST), Microsoft Research, scholarships fromthe Samsung Scholarship Foundation, a Stanford Graduate Fellowshipand a Stanford Terman Fellowship. We would like to thankMango Communications, especially Patrick Murphy, for timely arrangement for theWARP boards and support. Finally, we sincerelythank the anonymous reviewers for their invaluable comments.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2011
Y1 - 2011
N2 - 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. © 2011 ACM.
AB - 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. © 2011 ACM.
UR - http://hdl.handle.net/10754/599375
UR - http://dl.acm.org/citation.cfm?doid=2030613.2030647
UR - http://www.scopus.com/inward/record.url?scp=80053601254&partnerID=8YFLogxK
U2 - 10.1145/2030613.2030647
DO - 10.1145/2030613.2030647
M3 - Conference contribution
SN - 9781450304924
SP - 301
EP - 312
BT - Proceedings of the 17th annual international conference on Mobile computing and networking - MobiCom '11
PB - Association for Computing Machinery (ACM)
ER -