Localization with non-synchronous emission and multipath transmission
A fixed position, transmission frequency technology used in illuminated areas with higher resolution images
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[0037] A number of methods are described below in the context of localization of radio frequency transmitting devices in indoor environments where the transmitting device is positioned independently of the receiver and where there are typically multiple reflection paths from the transmitting device to the receiver. Specific embodiments in which the sending device is a cellular phone (e.g., LTE transmissions in the 700MHz-2.6GHz range) or a wireless local area network device (e.g., IEEE 802.11 standard ("WiFi") transmissions at 2.4GHz or 5GHz) describe. It should be noted that the method to address the independence of the transmitting device and the positioning receiver and the method to address multipath effects can be used independently in various applications and together provide high accuracy in applications such as indoor positioning. For reference, the wavelengths of radio signals at 2.4Ghz and 5.0Ghz are approximately 12.5cm and 6.0cm, respectively.
[0038] A first embod...
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