Vertical adaptive antenna array for a discrete multitone spread spectrum communications system

143 Pages·2013·6.7 MB·English

US006584144B2
(12) United States Patent
(10) Patent N0.: US 6,584,144 B2
Alamouti et al. (45) Date of Patent: *Jun. 24, 2003
(54) VERTICALADAPTIVE ANTENNAARRAY (51) Int. C1.7 ................................................ .. H04B 1/69
FOR A DISCRETE MULTITONE SPREAD
SPECTRUM COMMUNICATIONS SYSTEM (52) US. Cl. ...................... .. 375/147, 375/150, 375/347
(75) Inventors Siavash Alamouti Kirkland> WAWS); (58) Field of Search ............................... .. 375/147, 148,
J oel E. Becker, Hauppauge, NY (US);
375/150, 347, 267
Douglas Frank Stolarz, Seattle, WA
(Us)
(56) References Cited
(73) Assignee: AT&T Wireless Services, Inc.,
U.S. PATENT DOCUMENTS
Redmond, WA (US)
4,914,676 A 4/1990 IWamatsu et al.
( * ) Notice: Subject to any disclaimer, the term of this 5,274,384 A 12/1993 Hussain et al.
patent is extended or adjusted under 35 5,463,656 A 10/1995 Polivka et al.
U.S.C. 154(b) by 0 days. 5,933,421 A 8/1999 Alamouti et al.
6,064,338 A 5/2000 Kobayakawa et al.
This patent is subject to a terminal dis 6,073,032 A 6/2000 Keskitalo et al.
claimer. 6,081,566 A 6/2000 Molnar et al.
Primary Examiner—Temesghen Ghebretinsae
(21) Appl. No.: 10/017,903
(74) Attorney, Agent, or Firm—Perkins Coie LLP
(22) Filed: Dec. 10, 2001
(57) ABSTRACT
(65) Prior Publication Data
TWo or more antenna elements are arranged in the vertical
US 2002/0159506 A1 Oct. 31, 2002 direction to give vertical spatial adaptivity to a Wireless
discrete multitone spread spectrum communications system.
(Under 37 CFR 1.47)
The system is based on a combination of Discrete Multitone
Spread Spectrum (DMT-SS) and multi-element adaptive
Related US. Application Data
antenna array technologies. This enables the automatic posi
tioning of a beam in the vertical direction to position nulls
(63) Continuation of application No. 09/259,409, ?led on Feb.
23, 1999, which is a continuation of application No. 09/128, Where interferers are located on the same aZimuth but are
738, ?led on Aug. 5, 1998, which is a continuation of separated in elevation.
application No. 08/937,654, ?led on Sep. 24, 1997, now
abandoned, which is a continuation of application No.
08/806,510, ?led on Feb. 24, 1997, now abandoned. 24 Claims, 100 Drawing Sheets
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