公开(公告)号：EP1232571B1

公开(公告)日：2006-12-13

申请号：EP00959723.8

申请日：2000-08-31

Applicant: MOTOROLA INC.

Inventor： PFEIL, Jeff, L. ,  ROTTINGHAUS, Alan, P. ,  HENDERSON, Stephen, W. ,  TAPIA, Javier, J.

IPC: H04B1/38 ,  H04B7/216 ,  H04Q7/20 ,  H04M1/00

CPC classification number: H04W64/00 ,  G01S5/12 ,  H04B7/086

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 elements to determine direction of arrival information.

公开(公告)号：EP1232571A1

公开(公告)日：2002-08-21

申请号：EP00959723.8

申请日：2000-08-31

Applicant: MOTOROLA INC.

Inventor： PFEIL, Jeff, L. ,  ROTTINGHAUS, Alan, P. ,  HENDERSON, Stephen, W. ,  TAPIA, Javier, J.

IPC: H04B1/38 ,  H04B7/216 ,  H04Q7/20 ,  H04M1/00

CPC classification number: H04W64/00 ,  G01S5/12 ,  H04B7/086

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 elements to determine direction of arrival information.

公开(公告)号：EP1230754A1

公开(公告)日：2002-08-14

申请号：EP00943055.4

申请日：2000-06-22

Applicant: MOTOROLA, INC.

Inventor： HENDERSON, Stephen, W. ,  PFEIL, Jeff, L. ,  TAPIA, Javier, J.

IPC: H04B17/00

CPC classification number: H04B17/309 ,  H04W52/24

Abstract: A method and apparatus for estimating mobile radio channel parameters (209) by dynamically determining the delay offset (435), carrier frequency offset, and coherent averaging length that yields the optimum despreading gain for current channel conditions. Obtaining the optimal despreading gain increases the fidelity of desired channel parameter estimates and also expands the range of conditions under which they can be feasibly measured. A plurality of delay offsets (407) carrier frequency offsets, and coherent averaging lengths are considered for each measurement of channel parameters. An energy metric (439) is assigned to each combination of delay offset and coherent averaging length, and this value measures the despreading gain for these conditions.