Patent Number: 6,252,867

Title: Method and apparatus for determining remote unit location using phased array antenna elements

Abstract: An apparatus (100) and method dynamically allocates radio frequency receive path resources as required by a programmable location engine (112). The programmable location engine (112) employs cascaded time of arrival and direction of arrival algorithms to determine per remote unit location data. The apparatus (100) employs a phased array antenna (104) and a programmable receiver switching apparatus (108). A plurality of radio frequency receivers (102a-102n) receive a plurality of different carriers, such as CDMA carriers, on each of a different phased array antenna element (106a-106d). An RF switching matrix (126) and mobile location shared resource controller (110) dynamically switch the plurality of radio frequency receivers (102a-102b) to not only receive the different carriers on each of the different phased antenna radio elements to determine time of arrival information, but alternately receive a same carrier signal over all or a portion of the phased array antenna element to determine direction of arrival information.

Inventors: Pfeil; Jeff L. (Bartlett, IL), Rottinghaus; Alan P. (Barrington, IL), Henderson; Stephen W. (Chicago, IL), Tapia; Javier J. (Wheaton, IL)

Assignee: Motorola, Inc.

International Classification: G01S 5/12 (20060101); H04B 7/08 (20060101); H04Q 7/38 (20060101); H04B 017/02 (); H04B 001/38 (); H04B 007/216 (); H04Q 007/20 (); H04M 001/00 ()

Expiration Date: 06/26/2018