HYBRID SPACE-TIME DIVERSITY BEAM FORMING METHOD

Title:

HYBRID SPACE-TIME DIVERSITY BEAM FORMING METHOD

Document Type and Number:

WIPO Patent Application WO/2004/047333

Kind Code:

A2

Abstract:

A method of beam forming is provided for an appliqué intelligent antenna system. The appliqué system uses a watchdog function to monitor broadcast channels of an existing mobile wireless base station to which it is attached. The appliqué system synchronizes itself in frequency and time to the base station. In GSM timing delays are used to prevent collision of timeslots from various mobile terminals. The appliqué system uses this time delay mechanism to compensate for its own processing delays so that its presence is transparent to the existing base station. Angle of arrival calculations are made to determining beamforming parameters. The antenna of the four element antenna system are separated by is (5^{1/2 &lowbar}1)/2 times the wavelength. Angle of arrival for the strongest uplink multipath signal are used to direct the downlink beam.

Inventors:

WU SHIQUAN (CA)
LITVA JOHN (CA)

Application Number:

PCT/CA2003/001747

Publication Date:

June 03, 2004

Filing Date:

November 18, 2003

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TENXC WIRELESS (CA)
WU SHIQUAN (CA)
LITVA JOHN (CA)

International Classes:

H01Q1/24; H01Q3/26; H01Q21/08; H04B7/04; H04B7/26; H04L12/56; H04B7/005; H04B7/08; (IPC1-7): H04B7/06

Domestic Patent References:

WO2001072081A1	2001-09-27
WO1992005672A1	1992-04-02

Foreign References:

EP0474138A2	1992-03-11
US6356763B1	2002-03-12
US5390216A	1995-02-14

Other References:

PAPATHANASSIOU A ET AL: "Multi-user direction of arrival and channel estimation for time-slotted CDMA with joint detection" DIGITAL SIGNAL PROCESSING PROCEEDINGS, 1997. DSP 97., 1997 13TH INTERNATIONAL CONFERENCE ON SANTORINI, GREECE 2-4 JULY 1997, NEW YORK, NY, USA,IEEE, US, 2 July 1997 (1997-07-02), pages 375-378, XP010250987 ISBN: 0-7803-4137-6

Attorney, Agent or Firm:

Smith, Dallas F. (Suite 2600 160 Elgin Stree, Ottawa Ontario K1P 1C3, CA)

Download PDF:

View/Download PDF PDF Help

Previous Patent: METHOD FOR CONTROLLING THE TRANSMIT POWER OF A FIRST STATION IN A COMMUNICATION SYSTEM BY MEANS OF A...

Next Patent: COMMUNICATION SYSTEM