Research of GNSS Positioning Technique with Vehicle-mounted Dual-reflector Antenna

Abstract

With such strengths as global coverage, low facility cost and good compactness, GNSS is the most popular technology used in providing navigation and positioning services for vehicles. To address the concern that the receive antenna is impossible to be mounted on the roof of a vehicle in whole but only separately by means of dual reflectors, an analysis was made to the positioning principle of dual-reflector antenna, upon which the coordinate transformation of dual reflectors as well as the corresponding relation between position and attitude determination were derived in addition to a description of the visibility requirements in different application environments. And then, an attitude determination and positioning technique was proposed on the basis of data fusion before an analysis was made to the effect of the system error to the positioning performance. The analysis result showed that the positioning performance was guaranteed with at least four visible satellites by means of signal fusion when dual-reflector antenna is used.