Enhanced GNSS receiver
First Claim
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1. A GNSS receiver for tracking desired ranging signals, the GNSS receiver comprising:
- a) a vector tracking loop for tracking the desired ranging signals in accordance with estimated direct and reflected signal arrival times of the desired ranging signals; and
b) cross correlation processing means for estimating the direct and reflected signal arrival times and for supplying the estimated direct and reflected signal arrival times to the vector tracking loop.
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Abstract
An improved GPS or GNSS receiver can operate at low signal levels and in the presence of RF interference including multipath. Three separate technologies known in the prior art are integrated: a) vector tracking of multiple parameters in a multi-dimensional state space; b) fast correlation processing (107) of GPS or GNSS signals; and c) multiple signal characterization based on eigenvalue/eigenvector analysis of correlation matrices.
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Citations
10 Claims
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1. A GNSS receiver for tracking desired ranging signals, the GNSS receiver comprising:
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a) a vector tracking loop for tracking the desired ranging signals in accordance with estimated direct and reflected signal arrival times of the desired ranging signals; and
b) cross correlation processing means for estimating the direct and reflected signal arrival times and for supplying the estimated direct and reflected signal arrival times to the vector tracking loop. - View Dependent Claims (2, 3, 4, 5)
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6. A GNSS receiver for tracking desired ranging signals, the GNSS receiver comprising:
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a) a vector tracking loop for tracking the desired ranging signals in accordance with estimated direct and reflected signal arrival times of the desired ranging signals and in accordance with initialization and acquisition aiding data;
b) cross correlation processing means for estimating the direct and reflected signal arrival times and for applying the direct and reflected signal arrival times to the vector tracking loop; and
c) means for receiving the initialization and acquisition aiding data via an external communications system and for applying the initialization and acquisition aiding data to the vector tracking loop. - View Dependent Claims (7, 8, 9, 10)
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Specification