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Sensors 2018, 18(1), 88; https://doi.org/10.3390/s18010088

Performance Comparison with Different Antenna Properties in Time Reversal Ultra-Wideband Communications for Sensor System Applications

Institute of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
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Received: 31 October 2017 / Revised: 22 December 2017 / Accepted: 26 December 2017 / Published: 30 December 2017
(This article belongs to the Section Sensor Networks)
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Abstract

The complexity reduction of receivers in ultrawideband (UWB) communication when time reversal (TR) technique is applied makes it suitable for low-cost and low-power sensor systems. Larger antenna dispersion can generally lead to a less stable phase center and will increase the interference in UWB communications based on pulse radio, whereas a higher antenna gain will result in higher channel gain and further larger channel capacity. To find out the trade-off between antenna gain and dispersion, we performed the channel measurements using different antennas in a dense multipath environment and established the distribution of channel capacities based on the measured channel responses. The results show that the capacity loss caused by antenna dispersion cannot be compensated by antenna gain with line-of-sight transmission to some extent, the effect of phase center on the communication system is negligible, and antennas with smaller time dispersion will have a better energy focusing property and anti-interference performance in TR systems. View Full-Text
Keywords: UWB antenna; time reversal; channel measurement; channel capacity UWB antenna; time reversal; channel measurement; channel capacity
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Yang, Y.; Wang, B.-Z.; Ding, S. Performance Comparison with Different Antenna Properties in Time Reversal Ultra-Wideband Communications for Sensor System Applications. Sensors 2018, 18, 88.

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