Patent ID: 7474264
Filing Date: 2009-01-06
Classification: G01S,H04B

Abstract:
1. A system for detecting use and location of a RF transmit device in a vehicle, said system comprising: a first RF signal receiver located in a vehicle for receiving RF signals at a first location generated by an RF transmit device; a second RF signal receiver located in the vehicle for receiving RF signals at a second location generated by the RF transmit device; one or more RF power detectors for detecting signal strength of each of the RF signals received at the first and second locations and generating first and second output signals indicative thereof; and a signal processor for processing the first and second output signals to determine use of an RF transmit device in use in the vehicle and to further determine location of the RF transmit device in use, wherein the location of the RF transmit device in use is determined based on a comparison of the detected signal strength of the first and second output signals, wherein the vehicle comprises an automobile, and wherein the first location is located generally forward of a driver of the automobile and the second location is located generally rearward of the driver.