Squaring loss inhibition for low signal levels in positioning systems
First Claim
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1. A receiver, comprising:
- a data source configured to produce a replica of a data bit sequence and modulate the replica of the data bit sequence with a CDMA (“
code division multiple access”
) signal received from a first wireless signal source; and
a coherent integration stage configured to coherently integrate the CDMA signal over a first period of integration employing the replica of the data bit sequence, wherein the data source is configured to produce the replica of the data bit sequence based on data received from an external wireless source different from the first wireless signal source, and wherein the replica of the data bit sequence is based on assist data comprising satellite almanac data and a timing reference received from the external wireless source.
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Abstract
Embodiments related to acquisition, detection, and processing of a high-frequency signal in a global positioning system are described and depicted.
14 Citations
13 Claims
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1. A receiver, comprising:
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a data source configured to produce a replica of a data bit sequence and modulate the replica of the data bit sequence with a CDMA (“
code division multiple access”
) signal received from a first wireless signal source; anda coherent integration stage configured to coherently integrate the CDMA signal over a first period of integration employing the replica of the data bit sequence, wherein the data source is configured to produce the replica of the data bit sequence based on data received from an external wireless source different from the first wireless signal source, and wherein the replica of the data bit sequence is based on assist data comprising satellite almanac data and a timing reference received from the external wireless source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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producing a replica of a data bit sequence modulated on a CDMA signal received from a first wireless source, wherein the replica of the data bit sequence is based on assist data comprising satellite almanac data and a timing reference received from an external wireless source different from the first wireless signal source; and coherently integrating the CDMA signal over a first period of integration employing the replica of the data bit sequence. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification