Proceedings ArticleDOI
A low data rate FM-UWB transmitter with-based sub-carrier modulation and quasi-continuous frequency-locked loop
Bo Zhou,Rui He,Jian Qiao,Jinghui Liu,Woogeun Rhee,Zhihua Wang +5 more
- pp 1-4
TLDR
In this article, the authors describe the architecture and circuit design of a low data rate FM-UWB transmitter with a Δ-Σ fractional-N PLL with a multi-phase relaxation oscillator to enable sub-carrier modulation with reduced quantization noise.Abstract:
This paper describes the architecture and circuit design of a low data rate FM-UWB transmitter. A Δ-Σ fractional-N PLL with a multi-phase relaxation oscillator is designed to enable sub-carrier modulation with reduced quantization noise. The triangular waveform output of the relaxation oscillator directly modulates an LC VCO to have the UWB-compliant spectrum. The center frequency of the LC VCO is quasi-continuously tuned by a Δ-Σ DAC based frequency-locked loop with the power consumption of 1.1mW. The 3.43–4.03GHz FM-UWB transmitter implemented in 0.18μm CMOS consumes the total power of 9.6mW.read more
Citations
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Journal ArticleDOI
A Low-Energy Crystal-Less Double-FSK Sensor Node Transceiver for Wireless Body-Area Network
TL;DR: An energy-efficient crystal-less double-FSK transceiver for wireless body-area-network (WBAN) sensor nodes is implemented in 0.18-μm CMOS technology with a 1-V supply, and the injection-locking digitally controlled oscillator (IL-DCO) replaces the crystal oscillators, which leads to significantly reduce the energy consumption and system cost.
Journal ArticleDOI
A Gated FM-UWB System With Data-Driven Front-End Power Control
TL;DR: Experimental results show that the proposed gated FM-UWB system successfully demodulates the FSK information, achieving nearly 53% power saving with the data-driven power control enabled.
Journal ArticleDOI
Short-Range Low-Data-Rate FM-UWB Transceivers: Overview, Analysis, and Design
Bo Zhou,Patrick Chiang +1 more
TL;DR: High-robust relaxation oscillator for subcarrier generation, low-power ring oscillators for RF FM, automatic frequency calibration (AFC) for system robustness, and preamplifier-latch based analog phase interpolation for FM demodulation, are specially clarified.
Journal ArticleDOI
One Mbps 1 nJ/b 3.5–4 GHz Fully Integrated FM-UWB Transmitter for WBAN Applications
TL;DR: This paper introduces a fully integrated frequency-modulated ultra-wideband (UWB) transmitter implemented in 130 nm CMOS technology and uses a phase-locked loop (PLL)-based binary frequency-shift keying subcarrier generator to provide the modulated triangular waveform.
Proceedings ArticleDOI
Low power, non invasive UWB systems for WBAN and biomedical applications
TL;DR: The state-of-the-art UWB systems are reviewed, IC design challenges for WBAN and biomedical applications are addressed and the potential candidates for upcoming IEEE 802.15.6 body area network standard are considered.
References
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TL;DR: This tutorial overviews the state-of-the-art UWB in channel modeling, transmitters, and receivers of UWB radios, and outlines the research directions and challenges that needs to be overcome.
Proceedings ArticleDOI
Ultra-wideband communications: an idea whose time has come
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TL;DR: Constant-envelope FM-UWB uses high modulation index analog FM for spreading, combined with processing gain make this system an interesting option for robust LDR personal area network systems.
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Ernestina Cianca,Bharat Gupta +1 more
TL;DR: Frequency Modulated UWB as radar can meet the requirements of typical biomedical applications such as Non-Invasive Heart and Respiration Rate Monitoring and the integration of sensing and communication using FM-UWB and radar technology so that a single device can be obtained for two different operational mode.