Signal processing system for satellite positioning signals
First Claim
1. A satellite positioning system (SPS) receiver, comprising:
- at least one processor; and
a signal processing system coupled to the processor and operating in accordance with a low resolution operational mode and a high resolution operational mode of the SPS system, wherein the high resolution operational mode has a higher resolution that the low resolution operation mode for determining a position of the SPS receiver, and wherein the signal processing system includes;
an input sample subsystem coupled to the processor that receives SPS data via at least one channel and produces input data samples;
a signal processing subsystem coupled to the processor, wherein the signal processing subsystem includes at least one matched filter having a number of correlators automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode;
a fast Fourier transform (FFT) subsystem coupled to the processor and having at least one of a number of inputs and a transform size automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode; and
a memory subsystem having memory allocation to subsystems automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode.
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Accused Products
Abstract
A signal processing system for processing satellite positioning signals is described. The system comprises at least one processor and a signal processor operating under a number of operational modes. The signal processor includes at least one of a signal processing subsystem, a fast Fourier transform (FFT) subsystem, and a memory subsystem that are each dynamically and independently configurable in response to the operational modes. Further, the system includes a controller that couples to control transfer of data among the signal processing subsystem and the FFT subsystem via the memory subsystem. Configurability of the memory subsystem includes configuring the memory subsystem into regions according to the operational modes where each region is accessible in one of a number of manners according to the operational modes.
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Citations
51 Claims
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1. A satellite positioning system (SPS) receiver, comprising:
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at least one processor; and a signal processing system coupled to the processor and operating in accordance with a low resolution operational mode and a high resolution operational mode of the SPS system, wherein the high resolution operational mode has a higher resolution that the low resolution operation mode for determining a position of the SPS receiver, and wherein the signal processing system includes; an input sample subsystem coupled to the processor that receives SPS data via at least one channel and produces input data samples; a signal processing subsystem coupled to the processor, wherein the signal processing subsystem includes at least one matched filter having a number of correlators automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode; a fast Fourier transform (FFT) subsystem coupled to the processor and having at least one of a number of inputs and a transform size automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode; and a memory subsystem having memory allocation to subsystems automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 49, 50)
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32. A satellite positioning system (SPS) receiver, comprising:
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at least one processor and a signal processing system coupled to receive satellite positioning system SPS data and to operate under a plurality of operational modes including a low resolution operational mode and a high resolution operational mode, wherein the high resolution operational mode has a higher resolution than the low resolution operational mode for determining a position of the electronic system, wherein the signal processing system includes; a signal processing subsystem and a fast Fourier transform (FFT) subsystem that are automatically and dynamically configurable in response to the operational modes, wherein the signal processing subsystem includes at least one matched filter having a number of correlators automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode, wherein the fast Fourier transform (FFT) subsystem includes at least one of a number of inputs and a transform size automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An satellite positioning system (SPS) receiver, comprising:
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at least one processor and a signal processor operating according to a plurality of operational modes including a low resolution operational mode and a high resolution operational mode, wherein the high resolution operational mode has a higher resolution than the low resolution operational mode for determining a position of the SPS receiver, and wherein the signal processor includes; a signal processing subsystem, a fast Fourier transform (FFT) subsystem, and a memory subsystem, wherein each of the subsystems is dynamically and independently configurable in response to the operational modes and is coupled to receive SPS data, wherein a first controller couples to control transfer of data among the signal processing subsystem and the FFT subsystem via the memory subsystem, wherein configurability of the memory subsystem includes configuring the memory subsystem into regions in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode, and wherein the regions are each accessed in accordance with a first method in the low resolution operational mode and a second method in the high resolution operational mode. - View Dependent Claims (44, 45, 46, 47, 48)
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51. An satellite positioning system (SPS) receiver, comprising:
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means for controlling processing; means for processing signals coupled to the means for controlling processing and operating in accordance with operational modes of the system, the operational modes including a low resolution operational mode and a high resolution operational mode having a higher resolution than the low resolution operational mode, the means for processing signals including; means for receiving SPS data and producing input data samples; means for generating coherent data using the input data samples, wherein the means for generating coherent data includes at least one matched filter means having a number of correlators automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode; means for generating fast Fourier transforms (FFTs) having at least one of a number of inputs and a transform size automatically configured in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode; and means for storing data having memory allocation that is automatically allocated in accordance with a first configuration in the low resolution operational mode and a second configuration in the high resolution operational mode.
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Specification