SYSTEM AND METHOD FOR ANTENNA DIVERSITY USING JOINT MAXIMAL RATIO COMBINING

Title:

SYSTEM AND METHOD FOR ANTENNA DIVERSITY USING JOINT MAXIMAL RATIO COMBINING

Document Type and Number:

WIPO Patent Application WO2003075396

Kind Code:

A3

Abstract:

A composite beamforming technique is provided wherein a first communication device (100) has a plurality of antennas (110) and the second communication (200) has a plurality of antennas (210). When the first communication device transmits to the second communication device, the transmit signal is multiplied by a transmit weight vector for transmission by each the plurality of antennas and the transmit signals are received by the plurality of antennas at the second communication device. The second communication device determines the best receive weight vector for the its antennas, and from that vector, derives a suitable transmit weight vector for transmission on the plurality of antennas back to the first communication device. Several techniques are provided to determine the optimum transmit weight vector and receive weight vector for communication between the first and second communication devices so that there is effectively joint or composite beamforming between the communication devices.

Inventors:

SUGAR GARY L (US)
VAIDYANATHAN CHANDRA (US)
TESFAI YOHANNES (US)

Application Number:

PCT/US2003/005642

Publication Date:

February 12, 2004

Filing Date:

February 26, 2003

Export Citation:

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Assignee:

COGNIO INC (US)
SUGAR GARY L (US)
VAIDYANATHAN CHANDRA (US)
TESFAI YOHANNES (US)

International Classes:

H01Q3/28; H03G3/30; H04B1/04; H04B7/04; H04B7/06; H04B7/08; H04L1/06; H04L25/02; H04L27/26; H04B7/005; H04L25/03; (IPC1-7): H04M1/00

Domestic Patent References:

WO2002003568A1

2002-01-10

Foreign References:

US20020118781A1	2002-08-29
US6177906B1	2001-01-23
US20030002450A1	2003-01-02

Other References: