- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 IEEE Asian Solid-State Circuits Conference (A-SSCC) - Tainan, Taiwan (2018.11.5-2018.11.7)] 2018 IEEE Asian Solid-State Circuits Conference (A-SSCC) - A Sub-Picosecond Hybrid DLL for Large-Scale Phased Array Synchronization
摘要： A large-scale timing synchronization scheme for scalable phased arrays is presented. This approach utilizes a DLL co-designed with a subsequent 2.5GHz PLL. The DLL employs a low noise, fine/coarse delay tuning to reduce the in-band rms jitter to 323fs, an order of magnitude improvement over previous works at similar frequencies. The DLL was fabricated in a 65nm bulk CMOS process and was characterized from 27MHz to 270MHz. It consumes up to 3.3mW from a 1V power supply and has a small footprint of 0.036mm2.
关键词： phase noise,tracking loops,CMOS integrated circuits,radio frequency,phase locked loops,phased-arrays,delay-lines
更新于2025-09-23 15:22:29
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[IEEE 2019 Photonics North (PN) - Quebec City, QC, Canada (2019.5.21-2019.5.23)] 2019 Photonics North (PN) - Study of nonlinear optical refractive index in thin films formed by bloom gelatin and organic materials : (Indigo carmine dye and phenol red Ph indicator)
摘要： The presence of phase noise (PN) severely deteriorates the sensitivity and range of frequency-modulated continuous wave radar systems. Thus, characterization and continuous monitoring of the PN is indispensable, and its estimation is often employed directly on chip. Although many contributions investigate methods for PN estimation, almost all of them consider a continuous-wave (CW) input signal. Differently, in this paper, we aim to estimate the PN from a linear frequency modulated continuous wave (FMCW) signal. For that, we propose two methods utilizing a so-called artificial on-chip target and further digital signal processing. These methods are evaluated in real-time and are the first-known solutions to determine PN estimates during the operation of an FMCW radar transceiver. We prove our methods with both simulation and measurement results from a hardware prototype. Further, we present techniques to efficiently realize the concepts in digital hardware. Finally, we compare and trade off the proposed methods against computational complexity and performance. The novel techniques may be applied to arbitrary input frequencies and bandwidths, and do not require a reference-clock input.
关键词： Delay lines,millimeter-wave radar,phase noise (PN),(FMCW),estimation,monolithic microwave integrated circuits,frequency-modulated continuous wave
更新于2025-09-19 17:13:59
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[IEEE 2019 International Conference on Electrical Engineering and Computer Science (ICECOS) - Batam Island, Indonesia (2019.10.2-2019.10.3)] 2019 International Conference on Electrical Engineering and Computer Science (ICECOS) - Modelling of Polymer Coated-based Optical Fiber Sensor for Moisture Measurement in Transformer Oil
摘要： The presence of phase noise (PN) severely deteriorates the sensitivity and range of frequency-modulated continuous wave radar systems. Thus, characterization and continuous monitoring of the PN is indispensable, and its estimation is often employed directly on chip. Although many contributions investigate methods for PN estimation, almost all of them consider a continuous-wave (CW) input signal. Differently, in this paper, we aim to estimate the PN from a linear frequency modulated continuous wave (FMCW) signal. For that, we propose two methods utilizing a so-called artificial on-chip target and further digital signal processing. These methods are evaluated in real-time and are the first-known solutions to determine PN estimates during the operation of an FMCW radar transceiver. We prove our methods with both simulation and measurement results from a hardware prototype. Further, we present techniques to efficiently realize the concepts in digital hardware. Finally, we compare and trade off the proposed methods against computational complexity and performance. The novel techniques may be applied to arbitrary input frequencies and bandwidths, and do not require a reference-clock input.
关键词： phase noise (PN),estimation,frequency-modulated continuous wave (FMCW),millimeter-wave radar,Delay lines,monolithic microwave integrated circuits
更新于2025-09-16 10:30:52
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[IEEE 2018 15th European Radar Conference (EuRAD) - Madrid, Spain (2018.9.26-2018.9.28)] 2018 15th European Radar Conference (EuRAD) - Self-Adaptive Short-Range Leakage Canceler for Automotive FMCW Radar Transceivers
摘要： Frequency modulated continuous wave (FMCW) radar sensors are key enablers for many of today’s driver assistance systems. For several reasons, these sensors are often placed right behind the bodywork of the car. This, however, causes an undesired signal re?ection, the so-called short-range (SR) leakage. Together with the phase noise (PN) contained within the radar transmit signal, the SR leakage may increase the overall system noise ?oor, thus degrading the detection sensitivity. In previous work, we proposed a cancelation concept for the SR leakage. Therein, however, the SR leakage was considered to be a static object re?ection with known re?ection parameters. In this work, we extend the proposed SR leakage canceler, and present a fully self-adaptive version of it. We prove our concept based on measurement results from a hardware prototype, wherein the proposed adaptive SR leakage cancelation is carried out in real-time on a ?eld programmable gate array (FPGA).
关键词： MMICs,Millimeter wave radar,adaptive systems,delay lines,digital integrated circuits
更新于2025-09-04 15:30:14