- 标题
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- 实验方案
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SPAD-Based LiDAR Sensor in 0.35 μm Automotive CMOS with Variable Background Light Rejection
摘要： We present a SPAD-based LiDAR sensor fabricated in an automotive certified 0.35 μm CMOS process. Since reliable sensor operation in high ambient light environment is a crucial factor in automotive applications, four SPADs are implemented in each pixel to suppress ambient light by the detection of photon coincidences. By pixel individual adjustment of the coincidence parameters to the present ambient light condition, an almost constant measurement performance is achieved for a wide range of different target reflectance and ambient illumination levels. This technique allows the acquisition of high dynamic range scenes in a single laser shot. For measurement and demonstration purpose a LiDAR camera with the developed sensor has been built.
关键词： time-of-flight (TOF),background rejection,single-photon avalanche diode (SPAD),range imaging,light detection and ranging (LiDAR),photon coincidence
更新于2025-09-04 15:30:14
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[IEEE 2018 International Conference on Radar (RADAR) - Brisbane, Australia (2018.8.27-2018.8.31)] 2018 International Conference on Radar (RADAR) - A Range Sidelobe Suppression Technique Based on Adaptive Spectral Shaping for LFM Waveforms
摘要： This paper considers the problem of adaptively controlling range sidelobes of target returns for radar systems employing linear frequency modulated (LFM) waveforms. Conventional pulse compression method uses a fixed window to shape the spectral response of a reference waveform to control the range sidelobes of all radar returns. This non-adaptive approach needs to apply a severe spectral window with a peak to sidelobe ratio (PSR) that exceeds the signal to noise ratio (SNR) of the strongest return to ensure successful detection of weak targets in the presence of strong radar returns. This leads to unnecessary processing loss for weak targets. In this paper we propose a new range sidelobe suppression technique that adaptively shapes target spectral response to reduce the processing loss, in particular for weak targets, thereby improving detection sensitivity of the radar systems. It is significantly less complex than many existing range sidelobe suppression techniques. We verify the performance improvement of the proposed adaptive technique over the conventional non-adaptive technique using both simulated and real data.
关键词： LFM waveforms,adaptive spectral shaping,radar systems,range sidelobe suppression
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) - Atlanta, GA, USA (2018.10.31-2018.11.2)] 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) - A New Series Hybrid DC-DC Converter for Wide Input Range with SiC
摘要： A new series hybrid DC-DC converter targeting for communication power supply with wide input range is designed in this paper implemented with Silicon Carbide (SiC) power transistor. The proposed hybrid converter is a combination of forward and flyback converter with full usage of transformer energy and optimized efficiency. Forward converter is the main energy delivery part and resonant network is utilized for full energy transferring and soft switching. Forward converter resets the magnetizing energy and delivers it to the output. The forward and flyback part are connected in such a novel way where flyback output is in series with the primary side. A highly compact architecture is realized with single core, multi-winding shared power transformer. Due to low gate charge and parasitic capacitance, SiC devices are premium power transistors for high frequency and high power applications. With a proper transformer design, an efficient series hybrid SiC converter is demonstrated for 100V-to-400V input at 480W output power.
关键词： Resonant secondary,Series hybrid,SiC,Wide input range,ZCS,cascaded flyback
更新于2025-09-04 15:30:14
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Editorial for the Special Issue on Micro-Resonators: The Quest for Superior Performance
摘要： Micro-resonators have reached a distinctive level of maturity due to the accumulated wealth of knowledge on their design, modeling, and manufacturing during the past few decades. Alongside this tremendous scientific progress, micro-resonators are now commonly found in most electronic systems. In this Special Issue, our attempt was to look deeper into less-common topics in this field, such as the nonlinear operation of micro-resonators that are envisioned to play a more important role with the evolution of this technological area.
关键词： Nonlinear Operation,Micro-Resonators,Fabrication,Frequency Stability,Tuning Range,Quality Factor
更新于2025-09-04 15:30:14