1. Equivalent-Time Direct-Sampling Impulse-Radio Radar With Rotatable Cyclic Vernier Digital-to-Time Converter for Wireless Sensor Network Localization.
- Author
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Tseng, Shao-Ting, Chou, Hao-Chung, Hu, Bo-Syun, Kao, Yu-Hsien, Huang, Yuan-Hao, and Chu, Ta-Shun
- Subjects
DOPPLER radar ,WIRELESS sensor networks ,ULTRA-wideband communication ,NYQUIST frequency ,COMPLEMENTARY metal oxide semiconductors - Abstract
This paper presents a rotatable cyclic Vernier digital-to-time converter (DTC) with 1.8 ps timing resolution on an 80 ns time scale. The proposed DTC features high timing resolution, and can be utilized in beam-steering arrays, which is infeasible for ordinary Vernier DTCs. The proposed DTC was implemented within a passive time-equivalent direct-sampling ultra-wideband impulse-radio radar system and was fabricated in 65 nm CMOS technology. This radar system is capable of quantizing direct-sampled impulse waveforms to provide full degrees of freedom for backend digital signal processing. The measured differential nonlinearity/integral nonlinearity of the DTC was +4.6/−3 and 12.4/−9.4 where the LSB was 1.8 ps, and the total power consumption was 133 mW. Also, a new method for localization between wireless sensor nodes of equivalent-time direct-sampling radar is presented in this paper; this method can theoretically achieve resolution as high as that of regular radar. [ABSTRACT FROM PUBLISHER]
- Published
- 2018
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