Sergei Podshivalov
Broadcom
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Publication
Featured researches published by Sergei Podshivalov.
ieee/ion position, location and navigation symposium | 2016
Todd E. Humphreys; Matthew Murrian; Frank van Diggelen; Sergei Podshivalov; Kenneth M. Pesyna
The feasibility of centimeter-accurate carrier-phase differential GNSS (CDGNSS) positioning using a smartphones internal GNSS antenna and GNSS chip is investigated. Precise positioning on a mass-market platform would significantly influence the world economy, ushering in a host of consumer-focused applications that have so far been hampered by the several-meter-level errors in traditional GNSS positioning. Previous work has shown that GNSS signals received through a mass-market smartphones GNSS antenna can be processed to yield a centimeter-accurate CDGNSS position solution, but this earlier work processed all GNSS signals externally to the smartphone. The question remains whether a smartphones internal oscillator and GNSS chip can produce observables of sufficient quality to support centimeter-accurate carrier-phase-based positioning. This paper answers the question by accessing and processing the raw code- and carrier-phase observables produced by a mass-market smartphone GNSS chip - observables that have heretofore been unavailable to the research community. The phones carrier phase measurements are shown to suffer from five anomalies compared to those from a survey-grade GNSS receiver, four of which are readily fixed in post-processing. The remaining anomaly, an error in the phase measurement that grows approximately linearly with time, currently prevents the phones phase measurements from satisfying the conditions for CDGNSS positioning. But the phones measurements seem otherwise fully capable of supporting cm-accurate carrier-phase differential GNSS positioning. A separate analysis of a smartphones GNSS signal strength dependency on azimuth and elevation reveals that multipath-induced deep fading and large phase errors remain a significant challenge for centimeter-accurate smartphone positioning.
Archive | 2007
Charles Abraham; Sergei Podshivalov; Frank van Diggelen
Archive | 2003
Charles Abraham; Serge de la Porte; Sergei Podshivalov
Archive | 2004
Charles Abraham; Sergei Podshivalov
Archive | 2009
Frank van Diggelen; Sergei Podshivalov; Charles Abraham
Archive | 2004
Charles Abraham; Sergei Podshivalov
Archive | 2006
Frank van Diggelen; Charles Abraham; Sergei Podshivalov
Archive | 2006
Matthew Riben; Sergei Podshivalov; Frank van Diggelen; Charles Abraham
Archive | 2004
Sergei Podshivalov; Charles Abraham
Archive | 2005
Charles Abraham; Steven Malkos; Sergei Podshivalov