Joint processing of GNSS pseudorange signals
First Claim
1. A method for a receiver used with a positioning system, the method comprising:
- establishing a duration of an observation time period, wherein signals received from the positioning system at the receiver within the duration of the observation time period are subject to a common-mode bias;
saving a plurality of records for at least one observation time period, wherein the plurality of records each correspond to a corresponding signal received at the receiver from the positioning system during the duration of the at least one observation time period;
receiving, at the receiver from an adjacent receiver, a plurality of donated signals received at the adjacent receiver, wherein each of the plurality of donated signals are grouped into a common observation time period subject to a common-mode bias of the adjacent receiver; and
solving for the common-mode bias corresponding to the observation time period using the plurality of records for the at least one observation time period, wherein the solving includes solving for the common-mode bias of the plurality of donated signals from the adjacent receiver.
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Abstract
An approach to joint processing of GNSS signals to determine a receiver location and common mode bias associated with grouped records corresponding to GNSS signals. In this regard, a receiver may acquire signals from a GNSS space vehicle over a relatively long period of time. In turn, records corresponding to received signals may be stored and grouped. The grouping of records may be based on assumptions of a common-mode bias for certain records (e.g., records acquired within a given duration of an observation time period). Upon acquisition of a suitable number of records, an over-determined system may be established that is used in iterative processing to solve for location and/or bias values associated with the respective common-mode bias for each group of records. As such, improved receiver performance may be realized.
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Citations
22 Claims
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1. A method for a receiver used with a positioning system, the method comprising:
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establishing a duration of an observation time period, wherein signals received from the positioning system at the receiver within the duration of the observation time period are subject to a common-mode bias; saving a plurality of records for at least one observation time period, wherein the plurality of records each correspond to a corresponding signal received at the receiver from the positioning system during the duration of the at least one observation time period; receiving, at the receiver from an adjacent receiver, a plurality of donated signals received at the adjacent receiver, wherein each of the plurality of donated signals are grouped into a common observation time period subject to a common-mode bias of the adjacent receiver; and solving for the common-mode bias corresponding to the observation time period using the plurality of records for the at least one observation time period, wherein the solving includes solving for the common-mode bias of the plurality of donated signals from the adjacent receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification