Accuracy Analysis of Positioning Method for Fusion GPS Pseudo-Range and Continuous Wave Radar

2013 ◽  
Vol 756-759 ◽  
pp. 354-360
Author(s):  
Hui Juan Zhang ◽  
Chao Wei
Keyword(s):  
Continuous Wave ◽  
Calculated Data ◽  
Wave Radar ◽  
Global Positioning ◽  
Positioning Method ◽  
Measurement Principle ◽  
Trajectory Measurement ◽  
The Impact ◽  
Cw Radar ◽  
Range Test

Continuous wave (CW) radar and global positioning system (GPS) is the main equipment of trajectory measurement in range. Based on range test background, propose a method to fuse GPS pseudo-range and CW radar range to provide complete trajectory positioning parameters, effectively reduce the impact of the systematic error of the measuring element to improve positioning precision of aircraft orbit solving. Through research on the measurement principle and the practice calculated data is given in this paper. Finally, several famous practical examples and simulation results are presented to illustrate our method efficiently.

The Design and Implementation of CW Radar Signal Processing

2014 ◽  
Vol 686 ◽  
pp. 343-347
Author(s):  
Jin Tao ◽  
Chun Chen ◽  
Shang Fu Liu ◽  
Qing Wei Han
Keyword(s):  
False Alarm ◽  
Continuous Wave ◽  
Radar Data ◽  
Time Correlation ◽  
Radar Signal ◽  
Wave Radar ◽  
Low Altitude ◽  
Radar Data Processing ◽  
Data Terminal ◽  
Cw Radar

This paper study continuous wave radar data processing algorithm for low altitude detection, it is applied to continuous wave low altitude search radar data terminal, it can realize real-time correlation and track processing for the data of target echo and false alarm false alarm filtering, to get the real targets of track parameters. Finally, through the realization of FPGA, the experimental results achieve the precision of the system.

Monostatic continuous-wave radar integrating a tunable wideband leakage canceler for indoor tagless localization

2017 ◽  
Vol 9 (8) ◽  
pp. 1583-1590 ◽  
Author(s):  
Marco Mercuri ◽  
Paweł Barmuta ◽  
Ping Jack Soh ◽  
Paul Leroux ◽  
Dominique Schreurs
Keyword(s):  
Health Monitoring ◽  
Continuous Wave ◽  
Dynamic Range ◽  
Passive Microwave ◽  
Ultra Wideband ◽  
Strong Reduction ◽  
Wave Radar ◽  
Microwave Design ◽  
Stepped Frequency ◽  
Cw Radar

Continuous-wave (CW) radars have been recently investigated in healthcare aiming at contactless health monitoring. However, a major problem in monostatic CW architectures is represented by the unwanted leakage produced by poor isolation between transmitter and receiver, which can drastically decrease the receiver's sensitivity reducing therefore the radar dynamic range. Although this situation can be easily controlled in case of narrowband CW radar by an appropriate passive microwave design, it becomes much more complicated in case of stepped-frequency CW and frequency-modulated CW architectures that present an ultra-wideband nature. In this paper, a monostatic CW radar integrating a tunable wideband leakage canceler aiming at indoor tagless localization is presented and discussed. The use of the feedforward canceler allows a strong reduction of the unwanted leakage over the whole radar bandwidth. Experimental results demonstrate the feasibility of this approach, showing an outstanding improvement of the radar dynamic range.

scholarly journals Impact of spatial averaging on radar reflectivity at internal snowpack layer boundaries

2016 ◽  
Vol 62 (236) ◽  
pp. 1065-1074 ◽  
Author(s):  
N. RUTTER ◽  
H.-P. MARSHALL ◽  
K. TAPE ◽  
R. ESSERY ◽  
J. KING
Keyword(s):  
Continuous Wave ◽  
Microwave Remote Sensing ◽  
Surface Scattering ◽  
Spatial Averaging ◽  
Microwave Radar ◽  
Snow Stratigraphy ◽  
Wave Radar ◽  
Snowpack Properties ◽  
The Impact

ABSTRACTMicrowave radar amplitude within a snowpack can be strongly influenced by spatial variability of internal layer boundaries. We quantify the impact of spatial averaging of snow stratigraphy and physical snowpack properties on surface scattering from near-nadir frequency-modulated continuous-wave radar at 12–18 GHz. Relative permittivity, density, grain size and stratigraphic boundaries were measured in-situ at high resolution along the length of a 9 m snow trench. An optimal range of horizontal averaging (4–6 m) was identified to attribute variations in surface scattering at layer boundaries to dielectric contrasts estimated from centimetre-scale measurements of snowpack stratigraphy and bulk layer properties. Single vertical profiles of snowpack properties seldom captured the complex local variability influencing near-nadir radar surface scattering. We discuss implications of scaling in-situ measurements for snow radiative transfer modelling and evaluation of airborne microwave remote sensing of snow.

scholarly journals Brachialis Pulse Wave Measurements with Ultra-Wide Band and Continuous Wave Radar, Photoplethysmography and Ultrasonic Doppler Sensors

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 165
Author(s):  
Horst Hellbrück ◽  
Gunther Ardelt ◽  
Philipp Wegerich ◽  
Hartmut Gehring
Keyword(s):  
Blood Pressure ◽  
Pulse Wave ◽  
Continuous Wave ◽  
Cuff Pressure ◽  
Wide Band ◽  
Pulse Radar ◽  
Wave Measurements ◽  
Wave Radar ◽  
Complete Measurement ◽  
Cw Radar

The measurement and analysis of the arterial pulse wave provides information about the state of vascular health. When measuring blood pressure according to Riva-Rocci, the systolic and diastolic blood pressure is measured non-invasively with an inflatable pressure cuff on the upper arm. Today’s blood pressure monitors analyze the pulse wave in reference to the rising or falling cuff pressure. With the help of additional pulse wave analysis, one can determine the pulse rate and the heart rate variability. In this paper, we investigated the concept, the construction, and the limitations of ultrawideband (UWB) radar and continuous wave (CW) radar, which provide continuous and non-invasive pulse wave measurements. We integrated the sensors into a complete measurement system. We measured the pulse wave of the cuff pressure, the radar sensor (both UWB and CW), the optical sensor, and ultrasonic Doppler as a reference. We discussed the results and the sensor characteristics. The main conclusion was that the resolution of the pulse radar was too low, even with a maximum bandwidth of 10 GHz, to measure pulse waves reliably. The continuous wave radar provides promising results for a phantom if adjusted properly with phase shifts and frequency. In the future, we intend to develop a CW radar solution with frequency adaption.

Development of an airborne millimeter-wave FM-CW radar for mapping river ice

1993 ◽  
Vol 20 (6) ◽  
pp. 1057-1064 ◽  
Author(s):  
Norbert E. Yankielun ◽  
Michael G. Ferrick ◽  
Patricia B. Weyrick
Keyword(s):  
High Resolution ◽  
Data Acquisition ◽  
Millimeter Wave ◽  
Continuous Wave ◽  
River Ice ◽  
Ice Thickness ◽  
Detailed Knowledge ◽  
Wave Radar ◽  
Ice Conditions ◽  
Cw Radar

Analyses of a river's freezeup ice cover stability and its breakup rely on detailed knowledge of the cover's thickness and the variability of that thickness. A high-resolution, millimeter wave (26.5- to 40-GHz) frequency modulated-continuous wave radar with real-time data acquisition and digital signal processing and display capability was deployed from a low-flying (3–10 m) helicopter to continuously acquire, process, and display data during an ice thickness profiling survey of a 24-km study reach. A nominal sheet ice thickness of 50 cm, occasional areas of new ice sheet as thin as 5 cm, open leads, and massive ice accumulations of the order of 5 m thick were encountered. Radar profiling data agreed with ground truth from borehole measurements of the sheet ice, and provided a more detailed view of the ice conditions than that obtained from a low altitude video survey. The radar system provided rapid, safe, and accurate data acquisition, allowing detailed mapping of the ice conditions throughout the reach. Key words: airborne, FM-CW radar, high-resolution radar, ice profiling, millimeter waves, radar remote sensing, river ice.

scholarly journals Analysis of the Snow Water Equivalent at the AEMet-Formigal Field Laboratory (Spanish Pyrenees) During the 2019/2020 Winter Season Using a Stepped-Frequency Continuous Wave Radar (SFCW)

2021 ◽  
Vol 13 (4) ◽  
pp. 616
Author(s):  
Rafael Alonso ◽  
José María García del Pozo ◽  
Samuel T. Buisán ◽  
José Adolfo Álvarez
Keyword(s):  
Software Defined Radio ◽  
Continuous Wave ◽  
Snow Water Equivalent ◽  
Cosmic Ray ◽  
Relative Dielectric Permittivity ◽  
Near Surface ◽  
Wave Radar ◽  
Spanish Pyrenees ◽  
Snow Water ◽  
Stepped Frequency

Snow makes a great contribution to the hydrological cycle in cold regions. The parameter to characterize available the water from the snow cover is the well-known snow water equivalent (SWE). This paper presents a near-surface-based radar for determining the SWE from the measured complex spectral reflectance of the snowpack. The method is based in a stepped-frequency continuous wave radar (SFCW), implemented in a coherent software defined radio (SDR), in the range from 150 MHz to 6 GHz. An electromagnetic model to solve the electromagnetic reflectance of a snowpack, including the frequency and wetness dependence of the complex relative dielectric permittivity of snow layers, is shown. Using the previous model, an approximated method to calculate the SWE is proposed. The results are presented and compared with those provided by a cosmic-ray neutron SWE gauge over the 2019–2020 winter in the experimental AEMet Formigal-Sarrios test site. This experimental field is located in the Spanish Pyrenees at an elevation of 1800 m a.s.l. The results suggest the viability of the approximate method. Finally, the feasibility of an auxiliary snow height measurement sensor based on a 120 GHz frequency modulated continuous wave (FMCW) radar sensor, is shown.

Sign in / Sign up

Export Citation Format

Share Document