Apparatus for computing signal correlation at multiple resolutions
First Claim
Patent Images
1. A satellite signal receiver, comprising:
- a front end for receiving a satellite signal;
a sampling circuit for digitizing said satellite signal, said digitized signal having either a first sample spacing or a second sample spacing;
a mode selection processor for selecting either said first sample spacing or said second sample spacing; and
a processor for performing at least a subset of a convolution between a pseudorandom reference code and said digitized signal.
6 Assignments
0 Petitions
Accused Products
Abstract
A satellite signal receiver is described. A front end receives a satellite signal. A sampling circuit digitizes the satellite signal, where the digitized signal has either a first sample spacing or a second sample spacing. A mode selection process selects either the first sample spacing or the second sample spacing. A processor performs at least a subset of a convolution between a pseudorandom reference code and the digitized signal.
-
Citations
17 Claims
-
1. A satellite signal receiver, comprising:
-
a front end for receiving a satellite signal;
a sampling circuit for digitizing said satellite signal, said digitized signal having either a first sample spacing or a second sample spacing;
a mode selection processor for selecting either said first sample spacing or said second sample spacing; and
a processor for performing at least a subset of a convolution between a pseudorandom reference code and said digitized signal. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A receiver of global positioning system (GPS) signals, comprising:
-
an RF/IF converter for filtering and frequency translating a received GPS signal to form an IF signal;
an analog to digital converter for digitizing said IF signal;
a tuner for removing Doppler shift from said digitized signal and producing an in-phase (I) and a quadrature (Q) signal;
a decimation circuit for subsampling said I and Q signals, said subsampled I and Q signals having either a first sample spacing or a second sample spacing;
a mode selection processor for selecting either said first sample spacing or said second sample spacing; and
a processor for performing at least a subset of a convolution between a C/A reference code and said subsampled I and Q signals. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
-
-
15. A receiver of global positioning system (GPS) signals, comprising:
-
means for filtering and frequency translating a received GPS signal to form an IF signal;
means for digitizing said IF signal;
means for removing Doppler shift from said digitized signal and producing an in-phase (I) and a quadrature (Q) signal;
means for subsampling said I and Q signals, said subsampled I and Q signals having either a first sample spacing or a second sample spacing;
means for selecting either said first sample spacing or said second sample spacing; and
means for performing at least a subset of a convolution between a C/A reference code and said subsampled I and Q signals. - View Dependent Claims (16, 17)
-
Specification