Patent ID: 6784831
Filing Date: 2004-08-31
Classification: G01S,H01Q

Abstract:
A global positioning system (GPS) signal receiver comprising:a) a plurality of antenna elements each receiving a plurality of GPS signals, each GPS signal comprising a baseband signal modulated onto a carrier signal within a predetermined first frequency band; b) a plurality of mixers corresponding to said array of antenna elements, said mixers converting said GPS signals received at said antenna elements in a frequency-division-multiplexed manner to produce GPS signals within a set of second frequency bands that correspond to said antenna elements, wherein successive bands in said set of second frequency bands are separated from each other; c) a combiner node that combines output of each mixer to produce a composite signal; d) an analog-to-digital converter that converts an analog signal derived from said composite signal into a digital word stream; e) demultiplexing logic that extracts components of said digital word stream, said components corresponding to said set of second frequency bands and said antenna elements; and f) beam forming logic, operably coupled to said demultiplexing logic, that applies variable phase delay and variable gain to each component in accordance with a set of weight values supplied thereto.