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Subject: search.filters.subject.GNSS

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    The use of the carrier to noise ratios (C/N0) to alleviate the problematic GNSS phase multipath
    (IEEE, 2022-01-25) Madonsela, Bheki; Davidson, Innocent; Mukubwa, Emmanuel
    The Global Navigation Satellite System (GNSS) multipath caused by the large time delays of the reflected signal causes errors to the output of the GNSS receiver, the Position, Velocity and Time (PVT). These errors are mitigated by the technology and architecture of the GNSS receiver. Numerous research has been conducted to reveal the correlation between the Signals to Noise Ratio (SNR). Various multipath-mitigating techniques uses the concept of SNR measurements during the data processing in the GNSS receiver to ease the impact of the signal multipath if the signal is imitated. In this paper, we define and analyse the concept of the multipath mitigation techniques that are dependent to the SNR measurements. Hence, all signal components that are found in GNSS signal such as phase, code, time and SNR will be utilized to estimate impact of the GNSS phase multipath. The technique of the C/V0 is incorporating the density power ration to the SNR measurements and this is used to calculate reliability of the GNSS signal tracking.
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    Airborne satellite navigation and other integrated antenna systems
    (IEEE, 2016) Ilcev, Stojce Dimov
    This paper is introducing the airborne satellite navigation and other integrated antenna systems for both weather and special navigation systems. In general, most of navigation antennas are omnidirectional, small and easy to install onboard aircraft, such as Global Navigation Satellite Antennas (GNSA) and other integrated antenna systems. However, in particular, some new developments of navigation antennas are providing miniaturized Global Navigation Satellite System (GNSS) antenna array technologies that significantly reduce the size of the antenna elements and the array dimensions. The passive and active GNSA for mobile applications including aeronautical are presented, which include all existing types of GNSS solutions. The GNSS antennas are usually omnidirectional, so they don’t need to be always pointed towards the satellite in spite of aircraft motions. In this paper are presented commercial aspects of the aircraft GNSS antenna technologies, their importance and integration with a digital beam-steering antenna electronics package. In addition, the solutions of different cost effective integrated antenna systems with GNSS antennas, such as airborne WAAS, XM, Weather, Sirius, ISL, DME, ADF, VOR, LOC, GS and other antenna systems are discussed.