Accurately determining one's position has been a recurrent problem in history [1]. It even
precedes the first deep-sea navigation attempts of ancient civilizations and reaches the …

A Global Positioning System (GPS) receiver uses satellite signals to determine position,
velocity, and timing information. Measurements are obtained by synchronising the locally …

A combined phase-locked loop/delay-locked loop has been developed for tracking weak
GPS C/A signals. This work enables the use of the weak side-lobe signals that are available …

The future of mobile wireless communication networks will be experienced several
generations as which have been experienced. This kind of development will drive the …

Many important GPS applications-such as the positioning of wireless devices, tracking
during ionospheric scintillation, and orbit determination of geostationary and high Earth orbit …

Abstract The GPS Antenna Characterization Experiment (GPS ACE) has made extensive
observations of GPS L1 signals received at geosynchronous (GEO) altitude, with the …

The carrier-to-noise density ratio (C/N 0) is considered an important parameter describing
the GPS receiver performance. This paper compares the performance of two popular coarse …

The initial acquisition of direct-sequence spread-spectrum (DSSS) signal transmitted in
bursts by ground terminals at satellite-borne receiver poses an engineering challenge. We …

Acquisition of very weak GPS signals requires long coherent and incoherent integration.
Increasing the coherent, or predetection, integration time (PIT) improves sensitivity, but is …

Extreme space weather events affect the stability and quality of the global navigation
satellite systems (GNSS) of the second generation (GPS, GLONASS, Galileo …