A 65-nm Sub-10-mW Communication/Ranging Quadrature Uncertain-IF IR-UWB Transceiver With Twin-OOK Modulation
This article describes a robust noncoherent transceiver architecture for pulse-based ultrawideband (UWB) communication systems. To address synchronization and interference issues in the conventional noncoherent transceiver with on-off keying (OOK) modulation, two techniques are proposed. The first o...
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Published in | IEEE journal of solid-state circuits Vol. 59; no. 6; pp. 1656 - 1667 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
New York
IEEE
01.06.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subjects | |
Online Access | Get full text |
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Summary: | This article describes a robust noncoherent transceiver architecture for pulse-based ultrawideband (UWB) communication systems. To address synchronization and interference issues in the conventional noncoherent transceiver with on-off keying (OOK) modulation, two techniques are proposed. The first one is twin-OOK (T-OOK) modulation, in which two pulses are used to represent 1-bit data. A short-duration synchronization pulse is employed for baseband synchronization, while a long-duration data pulse based on frequency-hopping (FH) OOK is employed for data transmission. The proposed modulation scheme not only addresses the synchronization problem of a transceiver baseband but also enhances the spectrum efficiency of a transmitter by adopting an FH method. The second one is uncertain-intermediate frequency (IF) down-conversion with quadrature demodulation. The quadrature uncertain-IF receiver achieves robust demodulation over frequency drift and good narrowband-interference (NBI) tolerance with an on-chip bandpass filter (BPF). In addition, ranging accuracy is enhanced with in-phase and quadrature (IQ) two-path signals. A prototype 6-8-GHz communication/ranging UWB transceiver is implemented in 65-nm CMOS. The transceiver achieves-71-dBm sensitivity at 10 Mb/s and 0.96-cm root-mean-square (rms) ranging accuracy. The transmitter and the receiver have the power consumption of 3.83 and 5.38 mW, respectively. |
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ISSN: | 0018-9200 1558-173X |
DOI: | 10.1109/JSSC.2023.3322134 |