Achieving Single Channel, Full Duplex Wireless Communication

Achieving Single Channel, Full Duplex Wireless Communication

September 20–24, 2010, Chicago, Illinois, USA | Jung Il Choi, Mayank Jain, Kannan Srinivasan, Philip Levis, Sachin Katti
This paper presents a design for a single-channel, full-duplex wireless transceiver that achieves full-duplexing with minimal impact on link reliability. The design combines RF and baseband techniques, including a novel technique called *Antenna Cancellation*, to cancel self-interference. Experiments on real nodes show that the full-duplex prototype achieves median performance within 8% of an ideal full-duplex system. The paper also discusses potential gains in MAC and network performance, such as solving hidden terminals, congestion, and end-to-end delays in multihop networks. The implementation uses off-the-shelf hardware and wireless radios, and the full-duplex prototype achieves a median throughput gain of 84% compared to half-duplex operation. However, the design has limitations in terms of transmit power, size, and bandwidth. The paper evaluates the effectiveness of antenna cancellation, its impact on communication range, and its performance in different bandwidths. It also compares the performance of antenna cancellation with other techniques and discusses the challenges and future work, including the potential for extending the system to higher transmit power and wider bandwidth systems.This paper presents a design for a single-channel, full-duplex wireless transceiver that achieves full-duplexing with minimal impact on link reliability. The design combines RF and baseband techniques, including a novel technique called *Antenna Cancellation*, to cancel self-interference. Experiments on real nodes show that the full-duplex prototype achieves median performance within 8% of an ideal full-duplex system. The paper also discusses potential gains in MAC and network performance, such as solving hidden terminals, congestion, and end-to-end delays in multihop networks. The implementation uses off-the-shelf hardware and wireless radios, and the full-duplex prototype achieves a median throughput gain of 84% compared to half-duplex operation. However, the design has limitations in terms of transmit power, size, and bandwidth. The paper evaluates the effectiveness of antenna cancellation, its impact on communication range, and its performance in different bandwidths. It also compares the performance of antenna cancellation with other techniques and discusses the challenges and future work, including the potential for extending the system to higher transmit power and wider bandwidth systems.
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