Back to results
US 8,411,726 B2Granted
Method and apparatus for performing signal correlation at multiple resolutions to mitigate multipath interference
AssigneeGlobal Locate, Inc.
InventorsCharles Abraham, Donald L. Fuchs
Life of this patent
Estimating the term…
Abstract
A method and apparatus for selecting a signal processing resolution. A received signal is processed using a first resolution. When a multipath condition is detected, the signal is processed using a second resolution.
Claims20
A method for selecting a signal processing resolution in a satellite signal receiver, the method comprising:
- receiving a signal at the satellite signal receiver;
- producing a plurality of samples of the signal;
- producing a signal correlation response by processing a first set of the plurality of samples of the signal at a first resolution;
- determining whether slopes of an ascending edge and a descending edge of the signal correlation response are symmetrical;
- and
- selecting a second resolution for processing the samples of the signal responsive to determining that the slopes of the ascending edge and descending edge are not symmetrical, wherein the second resolution is higher than the first resolution.
3 more elements
An apparatus for processing a satellite signal comprising:
- a satellite signal receiver configured to receive a signal;
- a sampler configured to produce a plurality of samples of the signal;
- a correlator configured to produce a signal correlation response by processing a first set of the plurality of samples of the signal, at a first resolution;
- and
- a detector coupled to the correlator, wherein the detector is configured to:
- determine whether slopes of an ascending edge and a descending edge of the signal correlation response are symmetrical;
- and
- instruct the correlator to select a second resolution for processing the samples of the signal responsive to determining that the slopes of the ascending edge and descending edge are not symmetrical, wherein the second resolution is higher than the first resolution.
5 more elements
A method for selecting a signal processing resolution in a satellite signal receiver, the method comprising:
- receiving a signal at the satellite signal receiver;
- producing a plurality of samples of the signal;
- producing a signal correlation response by processing a first set of the plurality of samples of the signal at a first resolution;
- determining whether a width of the signal correlation response is greater than a predetermined number of chips of the signal;
- detecting, based on the width of the signal correlation response, whether a multipath condition is present in the signal correlation response;
- and
- selecting a second resolution for processing the samples of the signal responsive to detecting that the multipath condition is present, wherein the second resolution is higher than the first resolution.
4 more elements
Dependencies are inferred from the claim text.