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Method and apparatus for GPS signal receiving that employs a frequency-division-multiplexed phased array communication mechanism

  • US 6,784,831 B1
  • Filed: 05/05/2003
  • Issued: 08/31/2004
  • Est. Priority Date: 05/05/2003
  • Status: Expired due to Fees
First Claim
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1. 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.

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