Systems and Methods for Reducing Variations in Received Signal Strength Indicator (RSSI) Measurements for Location Sensing
First Claim
1. A method comprising:
- receiving over a network, at a user device, from an access point, a signal comprising multiple signal components;
converting, by the user device, the signal to at least one of a frequency domain or a time domain such that the multiple signal components are associated with respective power values;
identifying, by the user device, at least a first portion of the multiple signal components associated with multipath fading based at least in part on the respective power values; and
determining, by the user device, a signal strength measurement based at least in part on the respective power values associated with at least a second portion of the multiple signal components.
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Abstract
Certain embodiments herein are directed to reducing variations in received signal strength indicator (RSSI) measurements that may be received by a wireless device over a network, such as a WiFi network including one or more access points. A signal sent from an access point may be received by a user device, where channel estimation results associated with the received signal may be analyzed to determine a more accurate location of the user device. The received signal may be converted to at least one of the time domain and the frequency domain, in which signal components associated with the received signal may be identified based on a determination that the signal components may be associated with multipath fading or other types of interference. Such identified signal components, whether in the frequency domain or the time domain) may be excluded from a determination of a signal strength measurement that may in turn be used to identify the location of the user device.
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Citations
23 Claims
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1. A method comprising:
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receiving over a network, at a user device, from an access point, a signal comprising multiple signal components; converting, by the user device, the signal to at least one of a frequency domain or a time domain such that the multiple signal components are associated with respective power values; identifying, by the user device, at least a first portion of the multiple signal components associated with multipath fading based at least in part on the respective power values; and determining, by the user device, a signal strength measurement based at least in part on the respective power values associated with at least a second portion of the multiple signal components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. One or more computer-readable media storing computer-executable instructions that, when executed by at least one processor, configure the at least one processor to perform operations comprising:
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receiving, over the network from an access point, a signal comprising multiple signal components; converting the signal to at least one of a frequency domain or a time domain such that the multiple signal components are associated with a respective power value; identifying at least a first portion of the multiple signal components associated with multipath fading based at least in part on the respective power value; and determining a signal strength measurement based at least in part on the respective power value associated with at least a second portion of the multiple signal components. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A device, comprising:
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at least one memory that stores computer-executable instructions; and at least one processor configured to access the at least one memory, wherein the at least one processor is configured to execute the computer-executable instructions to; receive, over the network from one or more access points, a signal comprising multiple signal components; convert the signal to a frequency domain signal such that the multiple signal components are associated with a first respective power value and a frequency; convert the signal to a time domain signal such that the multiple signal components are associated with a second respective power value and a time unit; determine a first signal strength measurement associated with the frequency domain signal based at least in part on the first respective power value; determine a second signal strength measurement associated with the time domain signal based at least in part on the second respective power value; and determine a combined signal strength measurement based at least in part on the first signal strength measurement and the second signal strength measurement. - View Dependent Claims (20, 21, 22, 23)
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Specification