MULTIPATH PROPAGATION DETECTION AND AVOIDANCE METHOD AND SYSTEM

摘要

Multipath propagation detection can be accomplished using first (22a) and second (24a) spaced antennas which receive a carrier signal from a moving radiation source and produce a carrier phase difference representative of the location of the source (Figure 6); a difference signal representative of the difference between the measured carrier phase difference and a predetermined phase difference for the source in that location is generated (62); and the presence of multipath distortion in that difference signal is determined (62). Furthermore, when a multiplicity of source signals are tracked as in reception of navigation signals from the Global Positioning Satellite System, the receiver may be programmed to eliminate or suppress errors arising from measurements that have been distorted by multipath propagation.