Reducing satellite signal interference in a global positioning system receiver
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Jul 2, 1998
filing date -
Jul 2, 1998
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Abstract
A method and apparatus is disclosed for reducing cross-interference between received satellite signals in a satellite positioning system receiver. A satellite positioning receiver receives satellite signals from a plurality of satellites. Spurious signals when processing a weak received satellite signal due to interference by a stronger received signal are reduced by estimating certain characteristics of the stronger signal, creating an interference waveform based on these estimated characteristics, and subtracting this interference waveform from a set of correlation outputs for the weaker signal to remove the interference effects of the stronger signal. Alternatively, a subset of these correlation outputs are ignored where the interference waveform produces strong spurious signals.
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