Two channel global positioning system receiver
First Claim
1. A method for operating a two channel digital global positioning system receiver for receiving coded satellite signals from each of a plurality of satellites, the signals exhibiting Doppler shifting, the method comprising the steps of:
- continuously tracking by a first channel of the receiver a particular one of the satellites for receiving information included in the coded satellite signals; and
sequentially tracking by a second channel of the receiver each of the plurality of satellites, except the one particular satellite, for receiving information included in the coded satellite signals.
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Abstract
A method and apparatus for operating a two channel digital global positioning system receiver for receiving coded satellite signals from each of a plurality of satellites, where the signals exhibit Doppler shifts. The method comprises the steps of continuously tracking of a particular one of the satellites for receiving information included in the coded satellite signals by one channel of the receiver, and sequentially tracking of each of the plurality of satellites, except the one particular satellite, by the other channel of the receiver for receiving information included in the coded satellite signals.
59 Citations
22 Claims
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1. A method for operating a two channel digital global positioning system receiver for receiving coded satellite signals from each of a plurality of satellites, the signals exhibiting Doppler shifting, the method comprising the steps of:
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continuously tracking by a first channel of the receiver a particular one of the satellites for receiving information included in the coded satellite signals; and sequentially tracking by a second channel of the receiver each of the plurality of satellites, except the one particular satellite, for receiving information included in the coded satellite signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A two channel digital global positioning system receiver for receiving coded satellite signals from each of a selected plurality of satellites, the signals exhibiting Doppler shifting, the receiver comprising:
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a first receiver channel means for continuously tracking a particular one of the plurality of satellites for receiving and decoding the coded satellite signals; and a second receiver channel means for sequentially tracking each of the plurality of satellite, except the one particular satellite, the second receiver channel means for receiving information from the plurality of coded satellite signals except for the coded satellite signal of the one particular satellite. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method for operating a two channel digital global positioning system receiver for receiving coded satellite signals from each of a plurality of satellites, the signals exhibiting Doppler shifting, the method comprising the steps of:
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continuously tracking by a first channel of the receiver a particular one of the satellites for receiving information included in the coded satellite signals; and sequentially tracking by a second channel of the receiver each of the plurality of satellites, except the one particular satellite, for receiving information included in the coded satellite signals; switching the channel performing continuous tracking; switching the channel performing sequential tracking; continuously tracking by the second channel; sequentially tracking by the first channel; switching the channel performing continuous tracking; switching the channel performing sequential tracking; continuously tracking by the first channel; sequentially tracking by the second channel; and iterating for successive 30 to 60 second time periods the steps of; switching the channel performing continuous tracking; switching the channel performing sequential tracking; continuously tracking by the second channel; sequentially tracking by the first channel; switching the channel performing continuous tracking; switching the channel performing sequential tracking; continuously tracking by the first channel; and sequentially tracking by the second channel.
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Specification