A New Method to Enhance Performance of Digital Frequency Measurement and Minimize the Clock Skew

2011 ◽  
Vol 11 (10) ◽  
pp. 2421-2425 ◽  
Author(s):  
N. Suresh Kumar ◽  
D. V. Rama KotiReddy
Keyword(s):  
Frequency Measurement ◽  
New Method ◽  
Clock Skew ◽  
Digital Frequency

A new method of demodulating the digital frequency modulation signals

2003 ◽  
Vol 2 (2) ◽  
pp. 5-10
Author(s):  
Jin-cai Sun ◽  
Wei-jie Zhu ◽  
Yi-yun Sun ◽  
Hui Xiao
Keyword(s):  
Frequency Modulation ◽  
New Method ◽  
Digital Frequency

New Method of Measuring Phase Characteristics of Antenna Using Doppler Frequency Measurement Technique

2004 ◽  
Vol 52 (12) ◽  
pp. 3312-3318 ◽  
Author(s):  
Q. Liu ◽  
S. Tsuruta ◽  
K. Asari ◽  
J. Ping ◽  
F. Kikuchi ◽  
...  
Keyword(s):  
Measurement Technique ◽  
Doppler Frequency ◽  
Frequency Measurement ◽  
New Method

A Displacement Sensor Based on Differential Frequency Measurement

2005 ◽  
Vol 295-296 ◽  
pp. 319-324
Author(s):  
Dong Lin Peng ◽  
Xing Hong Zhang ◽  
Xiao Kang Liu
Keyword(s):  
Angular Displacement ◽  
Frequency Measurement ◽  
Transmission Error ◽  
New Method ◽  
Displacement Sensor ◽  
Electric Wave

For many reasons, the study of differential frequency measurement had disappeared for some years. This paper applies the differential frequency measurement previously used to measure transmission error to static differential frequency measurement. A new method called method of duality for gear and electric wave is proposed to explain the differential frequency measurement in a new way to discover its essence. A novel angular displacement sensor is designed. The composite error is ±17″ based on the static differential frequency measurement.

scholarly journals New Method for Cut-off Frequency Measurement of Picoammeter

1982 ◽  
Vol 18 (7) ◽  
pp. 699-703
Author(s):  
Kiyoaki KIKUCHI ◽  
Koji OKAMOTO ◽  
Akira SUZUKI
Keyword(s):  
Frequency Measurement ◽  
New Method

Countdown Frequency Measurement and its Application in Radar AFC

2014 ◽  
Vol 556-562 ◽  
pp. 2650-2653
Author(s):  
Xiong Shi
Keyword(s):  
Control System ◽  
High Stability ◽  
Frequency Control ◽  
Electric Circuit ◽  
Frequency Measurement ◽  
Crystal Oscillator ◽  
Digital Frequency ◽  
Frequency Control System ◽  
Time Standard ◽  
Radar Frequency

High stability and constant-temperature crystal oscillator as time standard, microcontroller as control core, the countdown frequency measuring electric circuit, rapidly and timely surveying the transmitting frequency during the constant radar transmitted pulse, is a digital frequency measurement module. This module is an important constituent part in digital automatic radar frequency control system, having been successfully applied in a self-adaption frequency control system of meter wave warning radar.

scholarly journals High-Resolution Multi-Channel Frequency Standard Comparator Using Digital Frequency Measurement

Sensors ◽  
2021 ◽  
Vol 21 (16) ◽  
pp. 5626
Author(s):  
Bo Xiao ◽  
Ya Liu ◽  
Xiaohui Li ◽  
Zhifeng Deng ◽  
Yanrong Xue
Keyword(s):  
Measurement Method ◽  
Measurement Accuracy ◽  
Frequency Standard ◽  
Frequency Measurement ◽  
Low Noise ◽  
Measurement Technology ◽  
Zero Crossing ◽  
Noise Floor ◽  
Digital Frequency ◽  
Atomic Frequency

The rapid improvement accuracy of the atomic frequency standard puts forward higher requirements for the measurement resolution of the atomic frequency standard comparison system. To overcome the defect that the single zero-crossing point detection is sensitive to noise in the traditional dual mixer time difference measurement method, a digital frequency measurement method is proposed. This method combines sinusoidal beat technology, multi-channel synchronous acquisition technology, and digital frequency measurement technology, and uses differential compensation of system error to realize the precision measurement of atomic frequency standard. The frequency measurement accuracy is less than 2.5 × 10−14 and the noise floor is better than 6.5 × 10−15/τ = 1 s. The system has a high frequency measurement accuracy and a low noise floor, which can realize the precise measurement of a highly stable frequency source.

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