GNSS signals
Joint acquisition algorithm with assisted information for weak GNSS signals
... multi-satellite signals are neglected by the scalar- based acquisition and ...the GNSS signals from different satellites are exploited, the acquisition sensitivity will be improved ...
11
Evaluation Of Radio Frequency Interference (RFI) On Global Navigation Satellite System (GNSS) Signals
... earth. GNSS signal that reach the earth has very low power levels approximately -160 to -130 dBm, rendering them highly susceptible to ...of GNSS satellite signals by a GNSS ...Any ...
24
Detection of buried objects using reflected GNSS signals
... (GNSS) signals for sensing the Earth has been growing rapidly in recent ...detecting GNSS signals after they have been reflected off the Earth's surface and using them to determine the ...
13
Study and Analysis of GNSS Signals using In-house Developed Interference Tool
... navigation signals belonging to the same group and with the signals of the satellites belonging to other groups is an important parameter that must be considered while designing a GNSS receiver and ...
7
Cycle slip detection during high ionospheric activities based on combined triple frequency GNSS signals
... the GNSS signal drops below the tracking ...the GNSS signal pierce point along the ionosphere and motion of the receiver can lead the power fades of the signals to be under 30 dB-Hz, a condition ...
20
A ranging code based on the improved Logistic map for future GNSS signals: code design and performance evaluation
... codes for the different open signals. In order to com- pare different candidates of code families, selection cri- teria have been set up and constantly strengthened over the last decade. These criteria model the ...
13
Side peak cancellation method for sine BOC(m,n) modulated GNSS signals
... stand-alone implementation which is limited by a nar- rower hold-in range [6]. In addition, as it will be shown later, the extended BOC-PRN discriminator presents a re- duced resistance vis-à-vis the noise. Another ...
14
Sub-carrier shaping for BOC modulated GNSS signals
... Recent developments in the Galileo program have intro- duced a variety of new modulation schemes including the Binary Offset Carrier (BOC) [1] that has several advan- tages over traditional Binary Phase Shift Keying ...
18
Amelioration of Acquisition of a Degraded Signal in a GNSS Receiver Embeded in an Observation Satellite by Using Double Bloc Zero Padding Method (DBZP)
... modernized GNSS signals can be seriously degraded by the presence of bit sign transitions at each spreading code ...acquisition signals, in comparison with a classical acquisition method which is ...
9
Assessing avionics based GNSS integrity augmentation performance in UAS mission and safety critical tasks
... the GNSS antenna(e) masking matrixes for all aircraft manoeuvres with inputs from the 3DM, GCS and ...direct GNSS signals received by the aircraft in the presence of ionospheric and tropospheric ...
10
A new approach for GNSS tomography from a few GNSS stations
... of GNSS signals at the tomographic epoch and also for dis- cretization of the tomographic field is ...only GNSS networks with several stations, but also GNSS networks with few stations, ...
12
Assessing GNSS integrity augmentation techniques in UAV sense and avoid architectures
... The GNSS and Sensors Layer (GSL) passes the aircraft Position, Velocity, Time (PVT) and attitude (Euler angles) data (from the on board Inertial Navigation Systems, Air Data Computer, ...etc.), GNSS data ...
13
Using Multiple GNSS Constellations with Strict Quality Constraints for More Accurate Positioning in Urban Environments
... (GNSS) signals are capable of improving satel- lite availability for both standalone and differential ...using GNSS is constrained by severe multipath and poor satellite geometry, especially in ...
13
Determining Real Permittivity from Fresnel Coefficients in GNSS-R
... detecting GNSS signals reflected off the ground, and processing them to monitor its properties remotely (see ...except GNSS satellites, thus enabling the system to be light and compact (see ...by ...
8
Formulating a Vector Wave Expression for Polarimetric GNSS Surface Scattering
... by GNSS waves was described using the Kirchhoff tangent-plane scattering approximation and considering the location of source ...a GNSS wave off a rough ocean surface is presented in ...of GNSS ...
20
Atmospheric Water Estimation Using GNSS Precise Point Positioning Method
... When GNSS satellite signals travel from space to earth, they are affected by various error ...a GNSS receiver can provide location information with an accuracy varying from couple of meters down to ...
9
Usage of SDP Relaxation in Some GNSS Navigation Problems
... Abstract. In this paper, we propose an approach to the solution of two optimization problems that arise when solving problems of satellite navigation. The first problem consists in attitude determination using carrier ...
11
Return of a GNSS villain: The ionosphere strikes again
... The resulting disturbances in the geo- magnetic field often cause disturbances in the ionosphere (through fluctuations in electron density) because both are linked in complex ways. This process can lead to strong ...
6
Evaluating machine learning & antenna placement for enhanced GNSS accuracy for CAVs
... AT1675 GNSS wideband antenna were used in recording GNSS signals in this ...the GNSS antenna was mounted at the grid intersections on the roof of a Nissan Leaf 2011 model as shown in ...
7
Tracking the prey rather than the predator with GNSS
... surface. GNSS-based positioning has become a vital tool for a wide range of applications in areas such as surveying, mapping, asset management, precision agriculture, engineering and ...of GNSS technology ...
8