Geolocation aid and system
First Claim
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1. A method for identifying positions within a geolocation system comprising:
- transmitting an interrogation signal from a vehicle;
detecting the interrogation signal by a luminaire associate within at least one smart street light, wherein the smart street light has knowledge of a predetermined power spectral density shape of the interrogation signal transmitted by the vehicle;
sending a response from the smart street light;
receiving the response by the vehicle; and
measuring outputs of a plurality of bandpass filters employed with the luminaire associate and thereby estimating a position of the vehicle within the geolocation system from the interrogation signal detected by the luminaire associate.
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Abstract
A method and system for geolocation using a street light system having transponding technology. A predetermined band of radio frequencies employing spread spectrum technology is used to identify locations relative to an individual street light.
193 Citations
17 Claims
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1. A method for identifying positions within a geolocation system comprising:
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transmitting an interrogation signal from a vehicle; detecting the interrogation signal by a luminaire associate within at least one smart street light, wherein the smart street light has knowledge of a predetermined power spectral density shape of the interrogation signal transmitted by the vehicle; sending a response from the smart street light; receiving the response by the vehicle; and measuring outputs of a plurality of bandpass filters employed with the luminaire associate and thereby estimating a position of the vehicle within the geolocation system from the interrogation signal detected by the luminaire associate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for identifying locations within a geolocation system comprising:
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a vehicle having a communication system operatively coupled to a transmitter that is configured to transmit an interrogation signal; at least one street light having a luminaire associate that detects the interrogation signal and sends a response signal; a receiver operatively coupled to the communication system, that receives the response signal; and a computational device operatively coupled to the communication system that calculates a time period between transmission of the interrogation signal and reception of the response signal, wherein the luminaire associate comprises a processing device that is configured to estimate a distance from the vehicle to the luminaire associate, and further wherein the processing device estimates the distance by measuring a shape of the power spectral density of the interrogation signal detected by the luminaire associate and compares the shape with prior knowledge of the power spectral density shape for the interrogation signal as transmitted. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification