Hybrid satellite positioning receiver
First Claim
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1. A satellite positioning receiver comprising:
- an RF front end, for receiving satellite positioning signals;
an analogue to digital converter, for sampling the received signals to generate signal samples;
a memory; and
a processor, for processing the signal samples to derive code-phases and pseudo-ranges and to calculate a position fix,the processor having a first mode in which it is operable to process the samples as they are generated, to calculate the position fix anda second mode in which it is operable to store the samples or the code-phases or pseudo-ranges in the memory for later processing,wherein the processor is adapted to;
determine whether satellite trajectory information of predetermined quality is available at the receiver;
if such trajectory information is available, select the first mode, wherein the signal samples are processed to calculate a position fix; and
if such trajectory information is unavailable, select the second mode, wherein the samples are stored in the memory for later processing.
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Abstract
A satellite positioning receiver. The receiver comprises: an RF front end, for receiving satellite positioning signals; an analog to digital converter, for sampling the received signals to generate signal samples; a memory; and a processor, for processing the signal samples to derive code-phases and pseudo-ranges and to calculate a position fix. The processor has a first mode in which it is operable to process the samples as they are generated, to calculate the position fix. It also has a second mode in which it is operable to store the samples or the code-phases or pseudo-ranges in the memory for later processing.
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Citations
11 Claims
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1. A satellite positioning receiver comprising:
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an RF front end, for receiving satellite positioning signals; an analogue to digital converter, for sampling the received signals to generate signal samples; a memory; and a processor, for processing the signal samples to derive code-phases and pseudo-ranges and to calculate a position fix, the processor having a first mode in which it is operable to process the samples as they are generated, to calculate the position fix and a second mode in which it is operable to store the samples or the code-phases or pseudo-ranges in the memory for later processing, wherein the processor is adapted to; determine whether satellite trajectory information of predetermined quality is available at the receiver; if such trajectory information is available, select the first mode, wherein the signal samples are processed to calculate a position fix; and if such trajectory information is unavailable, select the second mode, wherein the samples are stored in the memory for later processing. - View Dependent Claims (2, 3, 4, 9, 10, 11)
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5. A satellite positioning receiver comprising:
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an RF front end, for receiving satellite positioning signals; an analogue to digital converter, for sampling the received signals to generate signal samples; a memory; and a processor, for processing the signal samples to derive code-phases and pseudo ranges and to calculate a position fix, the processor having a first mode in which it is operable to process the samples as they are generated, to calculate the position fix and a second mode in which it is operable to store the code-phases or pseudo-ranges in the memory for later processing, wherein the processor is adapted to; process the samples as they are generated, to derive code-phase or pseudo-range data; determine whether satellite trajectory information of predetermined quality is available at the receiver; if such trajectory information is available, select the first mode, wherein the code-phase or pseudo-range data is further processed to calculate a position fix; and if such trajectory information is unavailable, select the second mode wherein the derived code-phase or pseudo-range data are stored in the memory for later processing. - View Dependent Claims (6, 7, 8)
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Specification