32.8 A 98.4fs-Jitter 12.9-to-15.1GHz PLL-Based LO Phase-Shifting System with Digital Background Phase-Offset Correction for Integrated Phased Arrays

2021 ◽  
Author(s):  
Alessio Santiccioli ◽  
Mario Mercandelli ◽  
Simone M. Dartizio ◽  
Francesco Tesolin ◽  
Saleh Karman ◽  
...  
Keyword(s):  
Phased Arrays ◽  
Phase Shifting ◽  
Phase Offset ◽  
Offset Correction ◽  
Background Phase

Performance Analysis of GPS/BDS Precise Point Positioning

2015 ◽  
Vol 713-715 ◽  
pp. 1123-1126
Author(s):  
Xiao Yu Li ◽  
Jun Wang ◽  
Ya Tao Liu
Keyword(s):  
Precise Point Positioning ◽  
Satellite Orbit ◽  
Gps Measurements ◽  
Differential Code Bias ◽  
Phase Offset ◽  
Antenna Phase ◽  
Offset Correction ◽  
Code Bias ◽  
Point Positioning ◽  
Processing Steps

Precise Point Positioning (PPP) with GPS measurements has achieved a level of success. In order to benefit from the multiple available constellations, research has been undertaken to combineGPS and BDS measurements in PPP processing.Mathematical models of GPS/BDS combined precise point positioning are introduced in this paper. GPS/BDS combined PPP models are developed based on the GPS-only PPP. The data pre-processing steps include applying satellite orbit and clock corrections, satellite antenna phase offset correction, receiver antenna phase offset correction, differential code bias corrections, troposphere delay corrections and the the Ionosphere-free observation combination is used. The results show that the positioning precision and convergence speed of GPS/BDS combined PPP are improved compared with GPS-only PPP.

scholarly journals Pulse Dispersion in Phased Arrays

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Randy L. Haupt ◽  
Payam Nayeri
Keyword(s):  
Phased Array ◽  
Phased Arrays ◽  
Separation Distance ◽  
Phase Shifting ◽  
Phased Array Antenna ◽  
Phased Array Antennas ◽  
Wideband Signals ◽  
First Results ◽  
Definition Of ◽  
The Time Domain

Phased array antennas cause pulse dispersion when receiving or transmitting wideband signals, because phase shifting the signals does not align the pulse envelopes from the elements. This paper presents two forms of pulse dispersion that occur in a phased array antenna. The first results from the separation distance between the transmit and receive antennas and impacts the definition of far field in the time domain. The second is a function of beam scanning and array size. Time delay units placed at the element and/or subarrays limit the pulse dispersion.

A 270-to-300 GHz LO-Path Phase Shifting Architecture for Sub-mm-wave Phased Arrays

2018 ◽  
Author(s):  
Zyad Iskandar ◽  
Alexandre Siligaris ◽  
Jose Lugo-Alvarez ◽  
Emmanuel Pistono ◽  
Philippe Ferrari
Keyword(s):  
Phased Arrays ◽  
Phase Shifting

scholarly journals A method to correct background phase offset for phase‐contrast MRI in the presence of steady flow and spatial wrap‐around artifact

2018 ◽  
Vol 81 (4) ◽  
pp. 2424-2438 ◽  
Author(s):  
Aaron A. Pruitt ◽  
Ning Jin ◽  
Yingmin Liu ◽  
Orlando P. Simonetti ◽  
Rizwan Ahmad
Keyword(s):  
Steady Flow ◽  
Phase Contrast ◽  
Phase Contrast Mri ◽  
Phase Offset ◽  
Background Phase
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