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US 9,439,040 B2Granted
System and method of time of flight detection
AssigneeWensheng Hua
InventorWensheng Hua
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AssigneeWensheng Hua
InventorWensheng Hua
Estimating the term…
A position-determining apparatus, such as a GPS receiver, determines the position of the mobile device based on the time of flight of a transmitted probe signal using a method in which sections of the received signal is classified into two or more categories and accumulated according to categories before being used to compute the convolutions familiar in the context of a matched filter. Using the method of the present invention to compute the convolutions, and optionally applying additional time-saving techniques described herein, a position determination is achieved using a number of arithmetic operations that is significantly reduced from that required in prior art methods to compute the convolutions. The reduced number of arithmetic operations can reduce significantly the power consumption required of a device carrying out a method of the present invention, and thereby realizing a significant advantage.
An apparatus for determining a distance based on a transmitted signal, comprising:
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