Influence of significant radar system parameters on resolution of image in Doppler Radar Tomography

2016 ◽  
Vol 1 (2) ◽  
pp. 104-107
Author(s):  
Ewa SWIERCZ
Keyword(s):  
Doppler Radar ◽  
Radar System ◽  
System Parameters

Data-Based Quadrature Imbalance Compensation for a CW Doppler Radar System

2013 ◽  
Vol 61 (4) ◽  
pp. 1718-1724 ◽  
Author(s):  
Aditya Singh ◽  
Xiaomeng Gao ◽  
Ehsan Yavari ◽  
Mari Zakrzewski ◽  
Xi Hang Cao ◽  
...  
Keyword(s):  
Doppler Radar ◽  
Radar System

VARIATION OF METEOR ECHO RATES WITH RADAR SYSTEM PARAMETERS

1951 ◽  
Vol 29 (5) ◽  
pp. 403-426 ◽  
Author(s):  
D. W. R. McKinley
Keyword(s):  
Radio Wave ◽  
Wave Length ◽  
Radar System ◽  
Antenna Gain ◽  
Scattering Pattern ◽  
Magnitude Distribution ◽  
System Parameters ◽  
Transmitter Power ◽  
Meteor Trail ◽  
Strong Filter

Observations made with crossed-polarization radar system systems do not support the suggestion that the ionized meteor trail may act as a strong filter–polarizer of the incident radio wave. Experiments have been carried out to determine the variation of normal meteor echo rates with transmitter power, antenna gain, and radio wave length, and all confirm Lovell's scattering formula, provided that account is taken of the effective broadening of the scattering pattern of the meteor trail with increasing wave length. The limiting sensitivity of the 9.22 m. 200 kw. radar is determined to be about 9th magnitude. During a strong visual shower the observed increase in visual rates and low-power radar rates, compared to high-power radar rates, is explained by assuming that the magnitude distribution of the shower meteors differs from the normal nonshower distribution.

scholarly journals Research on Non-Contact Monitoring System for Human Physiological Signal and Body Movement

Biosensors ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 58 ◽  
Author(s):  
Qiancheng Liang ◽  
Lisheng Xu ◽  
Nan Bao ◽  
Lin Qi ◽  
Jingjing Shi ◽  
...  
Keyword(s):  
Monitoring System ◽  
Doppler Radar ◽  
Body Movement ◽  
Radar System ◽  
The Body ◽  
Body Motion ◽  
Physiological Monitoring ◽  
Physiological Signal ◽  
Signal Monitoring ◽  
Monitoring Devices

With the rapid increase in the development of miniaturized sensors and embedded devices for vital signs monitoring, personal physiological signal monitoring devices are becoming popular. However, physiological monitoring devices which are worn on the body normally affect the daily activities of people. This problem can be avoided by using a non-contact measuring device like the Doppler radar system, which is more convenient, is private compared to video monitoring, infrared monitoring and other non-contact methods. Additionally real-time physiological monitoring with the Doppler radar system can also obtain signal changes caused by motion changes. As a result, the Doppler radar system not only obtains the information of respiratory and cardiac signals, but also obtains information about body movement. The relevant RF technology could eliminate some interference from body motion with a small amplitude. However, the motion recognition method can also be used to classify related body motion signals. In this paper, a vital sign and body movement monitoring system worked at 2.4 GHz was proposed. It can measure various physiological signs of the human body in a non-contact manner. The accuracy of the non-contact physiological signal monitoring system was analyzed. First, the working distance of the system was tested. Then, the algorithm of mining collective motion signal was classified, and the accuracy was 88%, which could be further improved in the system. In addition, the mean absolute error values of heart rate and respiratory rate were 0.8 beats/min and 3.5 beats/min, respectively, and the reliability of the system was verified by comparing the respiratory waveforms with the contact equipment at different distances.

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