A novel approach to fractional-N PLLs generating ultra-fast low-noise chirps for FMCW radar

Integration ◽  
2021 ◽  
Vol 76 ◽  
pp. 139-147
Author(s):  
Frank Herzel ◽  
Arzu Ergintav ◽  
Gunter Fischer
Keyword(s):  
Low Noise ◽  
Fmcw Radar ◽  
Novel Approach

Computation of Parameters of a Form Grinding Wheel for Grinding of Shaving Cutter for Plunge Shaving of Topologically Modified Involute Pinion

2005 ◽  
Vol 127 (4) ◽  
pp. 819-828 ◽  
Author(s):  
Stephen P. Radzevich
Keyword(s):  
Transmission Error ◽  
Low Noise ◽  
Tooth Surface ◽  
Grinding Wheel ◽  
Cnc Machine ◽  
Surface Machining ◽  
Form Grinding ◽  
Novel Approach ◽  
Light Trucks ◽  
Part Surface

The paper is targeting on the finishing of precision gears for low-noise/noiseless transmission for cars and light trucks. Transmission error is the predominant cause of gear noise. The application of a topologically modified pinion results in reduction of transmission error up to two times. The required modification of the pinion tooth surface is provided on a plunge shaving operation with application of a shaving cutter of an appropriate design. A novel approach for computation of parameters of a form grinding wheel for grinding of the shaving cutter for plunge shaving of a precision involute pinion with topologically modified tooth surface is reported in the paper. The developed approach for computation of parameters of the form grinding wheel is focused on application of the shaving cutter grinder with a lack of CNC articulation. The problem under consideration is solved using the DG/K-based approach of part surface machining earlier developed by the author. (The DG/K-approach is based on fundamental results obtained in differential geometry of surfaces, and in kinematics of multi-parametric motion of a rigid body in E3 space (See Radzevich, S.P., Sculptured Surface Machining on Multi-Axis CNC Machine. Monograph, 1991, Vishcha Shkola Publishers, Kiev (in Russian). See also Radzevich, S.P., 2001, Fundamentals of Surface Machining. Monograph, Rastan, Kiev (in Russian).) An analytical solution to the problem is discussed in the paper. The solution has been used for developing software for the Mitsubishi ZA30CNC shaving cutter grinder for the needs of the automotive industry. Computer simulation reveals high accuracy of the ground shaving cutter.

Novel Approach to Voltage Adjustment of Low-noise Signaling in Power over Coax Circuits

2021 ◽  
Author(s):  
Yutaka Uematsu ◽  
Soshi Shimomura ◽  
Yasuhiro Ikeda ◽  
Hidetatsu Yamamoto ◽  
Hideyuki Sakamoto
Keyword(s):  
Low Noise ◽  
Novel Approach

scholarly journals Evaluation of a robust correlation-based true-speed-over-ground measurement system employing a FMCW radar

2019 ◽  
Vol 11 (7) ◽  
pp. 686-693 ◽  
Author(s):  
Torsten Reissland ◽  
Bjoern Lenhart ◽  
Johann Lichtblau ◽  
Michael Sporer ◽  
Robert Weigel ◽  
...  
Keyword(s):  
Continuous Wave ◽  
Field Measurements ◽  
Proof Of Concept ◽  
Fmcw Radar ◽  
Radar Sensors ◽  
Novel Approach ◽  
Ground Measurement ◽  
Wave Radar ◽  
24 Ghz

AbstractThis paper presents a novel approach for the determination of True-Speed-Over-Ground for trains. Speed determination is accomplished by correlating the received signals of two side-looking radar sensors. The theoretically achievable precision is derived. Test measurements are done in two different scenarios to give a proof of concept. Thereafter a series of field measurements is performed to rate the practical suitability of the approach. The results of the measurements are thoroughly evaluated. The test and field measurements are carried out using a 24 GHz frequency modulated continuous wave radar.

scholarly journals Educational Low-Cost C-Band FMCW Radar System Comprising Commercial Off-the-Shelf Components for Indoor Through-Wall Object Detection

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2758
Author(s):  
Hyunmin Jeong ◽  
Sangkil Kim
Keyword(s):  
Continuous Wave ◽  
Low Cost ◽  
Low Noise ◽  
Radar System ◽  
Indoor Environments ◽  
Voltage Controlled Oscillator ◽  
Band Frequency ◽  
Fmcw Radar ◽  
Sensing Applications ◽  
Commercial Off The Shelf

This paper presents an educational low-cost C-band frequency-modulated continuous wave (FMCW) radar system for use in indoor through-wall metal detection. Indoor remote-sensing applications, such as through-wall detection and positioning, are essential for the comprehensive realization of the internet of things or super-connected societies. The proposed system comprises a two-stage radio-frequency power amplifier, a voltage-controlled oscillator, circuits for frequency modulation and system synchronization, a mixer, a 3-dB power divider, a low-noise amplifier, and two cylindrical horn antennas (Tx/Rx antennas). The antenna yields gain values in the 6.8~7.8 range when operating in the 5.83~5.94 GHz frequency band. The backscattered Tx signal is sampled at 4.5 kHz using the Arduino UNO analog-to-digital converter. Thereafter, the sampled signal is transferred to the MATLAB platform and analyzed using a customized FMCW radar algorithm. The proposed system is built using commercial off-the-shelf components, and it can detect targets within a 56.3 m radius in indoor environments. In this study, the system could successfully detect targets through a 4 cm-thick ply board with a measurement accuracy of less than 10 cm.

scholarly journals A design methodology for programmable-gain low-noise TIA in CMOS

2021 ◽  
Vol 72 (3) ◽  
pp. 147-157
Author(s):  
Agata Romanova ◽  
Vaidotas Barzdenas
Keyword(s):  
Low Noise ◽  
Cmos Process ◽  
Entry Level ◽  
Amplifier Model ◽  
Novel Approach ◽  
Resistive Feedback ◽  
Reference Design ◽  
Optical Time ◽  
Programmable Gain ◽  
Frequency Behavior

Abstract The work reports on the design of an area-efficient inductor-less low-noise CMOS transimpedance amplifier suitable for entry-level optical time-domain reflectometers. The work suggests a novel approach for implementing a programmable-gain in capacitive feedback TIA with an independent adjustment of the low- and high-frequency behavior using the input stage biasing impedance and one of the feedback capacitors. The approach addresses a typical noise problem of fast feed-forward or resistive feedback topologies while alleviating the trade-off of the key TIA performance indicators. A more accurate amplifier model is proposed which takes into account the effects due to capacitive isolation and both biasing circuits. Further modifications to the reference design are suggested including the PMOS-based implementation of the biasing circuit to address the voltage headroom issue. The circuit was implemented using a standard 180 nm CMOS process and operates from 1.8 V supply with the drawn current of 11.7 mA.

A wide-band digital seismograph system

1970 ◽  
Vol 60 (5) ◽  
pp. 1417-1424 ◽  
Author(s):  
M. D. Burke ◽  
E. R. Kanasewich ◽  
J. D. Malinsky ◽  
J. F. Montalbetti
Keyword(s):  
Wide Spectrum ◽  
Broad Band ◽  
Seismic Energy ◽  
Wide Band ◽  
Low Noise ◽  
Operating Conditions ◽  
Operational Amplifiers ◽  
Natural Period ◽  
Novel Approach ◽  
Seismic System

Abstract A three-component, broad-band seismic system which records directly onto seven-track digital tape is described. A novel approach of synthesizing a desired response by a differential filtering and summing technic using low-noise operational amplifiers is demonstrated. As an example, the usable velocity sensitivity of a Willmore Mark II seismometer having a natural period of 1.5 sec is extended out to about 40 sec under normal operating conditions. Seismic energy over a wide spectrum may thus be recorded.

scholarly journals Incremental Decision Rules Algorithm: A Probabilistic and Dynamic Approach to Decisional Data Stream Problems

Mathematics ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 16
Author(s):  
Nuria Mollá ◽  
Alejandro Rabasa ◽  
Jesús J. Rodríguez-Sala ◽  
Joaquín Sánchez-Soriano ◽  
Antonio Ferrándiz
Keyword(s):  
Data Streams ◽  
Data Science ◽  
Decision Rules ◽  
Simulated Data ◽  
Adaptive Method ◽  
Low Noise ◽  
Decision Situation ◽  
Novel Approach ◽  
Rule Set ◽  
Rule Method

Data science is currently one of the most promising fields used to support the decision-making process. Particularly, data streams can give these supportive systems an updated base of knowledge that allows experts to make decisions with updated models. Incremental Decision Rules Algorithm (IDRA) proposes a new incremental decision-rule method based on the classical ID3 approach to generating and updating a rule set. This algorithm is a novel approach designed to fit a Decision Support System (DSS) whose motivation is to give accurate responses in an affordable time for a decision situation. This work includes several experiments that compare IDRA with the classical static but optimized ID3 (CREA) and the adaptive method VFDR. A battery of scenarios with different error types and rates are proposed to compare these three algorithms. IDRA improves the accuracies of VFDR and CREA in most common cases for the simulated data streams used in this work. In particular, the proposed technique has proven to perform better in those scenarios with no error, low noise, or high-impact concept drifts.

scholarly journals A new high-integrated weak field sensor for automotive applications

2009 ◽  
Vol 7 ◽  
pp. 89-94
Author(s):  
T. Thiessen ◽  
M. Prochaska
Keyword(s):  
Magnetic Field ◽  
Analog Circuit ◽  
Decisive Role ◽  
Low Noise ◽  
Production Costs ◽  
Smart Sensor ◽  
Automotive Applications ◽  
Novel Approach ◽  
Field Sensing ◽  
Magnetic Field Sensing

Abstract. Especially in the field of automotive applications smart sensor systems for magnetic field sensing face increasing requirements concerning low cost, low power consumption and high magnetic performance. Over the past years AMR sensors play a decisive role in this application area because of their robustness and stability. In the following a high-integrated smart sensor system for magnetic field sensing is presented. A novel approach for the detection of weak magnetic fields is shown, which is based on an AC-excitation of AMR elements. In contrast to common used sensors this concept is based on a nonlinear AMR element without Barber pole construction. By means of this methodology sensitivity as well as temperature and life time stability is significantly improved, while the production costs compared to common-used sensors are reduced. Within this novel approach new signal conditioning algorithms and analog circuit topologies are presented, which are able to meet low offset and low noise requirements.

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