29 April 2009 A hardware architecture for time reversal of short impulses based on frequency domain approach
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Abstract
In this paper, a compact and low-cost electronic circuit system is designed to time reverse short impulses in microwave regime. The proposed system consists of three major parts: (i) Fourier transform, to obtain discrete spectra of input impulses; (ii) Digital signal processing, to digitize spectral samples resulted from the first part and process them; and finally (iii) Inverse Fourier transform, to synthesize time-reversed impulses using discrete continuous wave elements. This architecture is composed of commercially available semi-conductor components, including oscillators, multipliers/mixers, band-pass-filters, amplifiers, and switches. Thus, it can embody a system-on-chip implementation of real-time time-reversal. Its performance is demonstrated by Advanced Design System simulations, with time-reversal of impulses with around 1.4 ns temporal width and [22, 29] GHz spectral coverage in noisy environments as examples.
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Shaoshu Sha, Varun K. Shenoy, Sungyong Jung, Mingyu Lu, Kyoungwon Min, Sungchul Lee, "A hardware architecture for time reversal of short impulses based on frequency domain approach", Proc. SPIE 7308, Radar Sensor Technology XIII, 73080T (29 April 2009); doi: 10.1117/12.818229; https://doi.org/10.1117/12.818229
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