Siavash M Alamouti

6501803, Dec 31, 2002

Oct 5, 1998

09/167422

Siavash Alamouti - Kirkland WA
Patrick Poon - Lamtin, HK
Vahid Tarokh - Hackensack NJ

ATT Wireless Services, Inc. - Redmond WA

H04L 512

375265, 375267, 714792

Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.

6560209, May 6, 2003

Apr 19, 1999

09/294174

Siavash Alamouti - Kirkland WA
Eduardo F. Casas - Vancouver, CA
Michael Hirano - Redmond WA
Elliott Hoole - Redmond WA
Mary Jesse - Issaquah WA
David G. Michelson - North Vancouver, CA
Patrick Poon - Redmond WA
Gregory J. Veintimilla - Redmond WA
Hongliang Zhang - Redmond WA

ATT Wireless Services, Inc. - Redmond WA

H04Q 700

370330, 370203, 370281, 370206, 370329, 370336, 370337

The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the systems operation. The highly bandwidth-efficient communications method combines a form of time division duplex (TDD), frequency division duplex (FDD), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), spatial diversity, and polarization diversity in various unique combinations. The method provides excellent fade resistance. The method enables changing a users available bandwidth on demand by assigning additional TDMA slots during the users session.

6584144, Jun 24, 2003

Dec 10, 2001

10/017903

Siavash Alamouti - Kirkland WA
Joel E. Becker - Hauppauge NY
Douglas Frank Stolarz - Seattle WA

ATT Wireless Services, Inc. - Redmond WA

H04B 169

375147, 375150, 375347

Two or more antenna elements are arranged in the vertical direction to give vertical spatial adaptivity to a wireless discrete multitone spread spectrum communications system. The system is based on a combination of Discrete Multitone Spread Spectrum (DMT-SS) and multi-element adaptive antenna array technologies. This enables the automatic positioning of a beam in the vertical direction to position nulls where interferers are located on the same azimuth but are separated in elevation.

6600776, Jul 29, 2003

Aug 5, 1998

09/128738

Siavash Alamouti - Kirkland WA
Joel E. Becker - Hauppauge NY
Douglas Frank Stolarz - Seattle WA

ATT Wireless Services, Inc. - Redmond WA

H04B 1707

375147, 375349, 375150

Two or more antenna elements are arranged in the vertical direction to give vertical spatial adaptivity to a wireless discrete multitone spread spectrum communications system. The system is based on a combination of Discrete Multitone Spread Spectrum (DMT-SS) and multi-element adaptive antenna array technologies. This enables the automatic positioning of a beam in the vertical direction to position nulls where interferers are located on the same azimuth but are separated in elevation.

6775329, Aug 10, 2004

Dec 5, 2000

09/730151

Siavash Alamouti - Kirkland WA
Vahid Tarokh - Madison NJ

ATT Wireless Services, Inc. - Redmond WA

H04B 702

375267, 375347

A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only of simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes space diversity and either time or frequency diversity. Space diversity is effected by redundantly transmitting over a plurality of antennas, time diversity is effected by redundantly transmitting at different times, and frequency diversity is effected by redundantly transmitting at different frequencies. Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the same diversity gain as the maximal-ratio receiver combining (MRRC) scheme with one transmit antenna and two receive antennas. The principles of this invention are applicable to arrangements with more than two antennas, and an illustrative embodiment is disclosed using the same space block code with two transmit and two receive antennas.

6782039, Aug 24, 2004

May 8, 2003

10/435304

Siavash Alamouti - Kirkland WA
Joel E. Becker - Hauppauge NY
Douglas Frank Stolarz - Seattle WA

ATT Wireless Services, Inc. - Redmond WA

H04B 169

375147, 375150, 375347

Two or more antenna elements are arranged in the vertical direction to give vertical spatial adaptivity to a wireless discrete multitone spread spectrum communications system. The system is based on a combination of Discrete Multitone Spread Spectrum (DMT-SS) and multi-element adaptive antenna array technologies. This enables the automatic positioning of a beam in the vertical direction to position nulls where interferers are located on the same azimuth but are separated in elevation.

6807240, Oct 19, 2004

Dec 3, 2001

10/005095

Siavash Alamouti - Kirkland WA
Patrick Poon - Lamtin, HK
Vahid Tarokh - Hackensack NJ

ATT Wireless Services, Inc. - Redmond WA

H03D 100

375341, 375267, 375265, 714795

Good transmission characteristics are achieved in the presence of fading with a transmitter that employs a trellis coder followed by a block coder. Correspondingly, the receiver comprises a Viterbi decoder followed by a block decoder. Advantageously, the block coder and decoder employ time-space diversity coding which, illustratively, employs two transmitter antennas and one receiver antenna.

6853629, Feb 8, 2005

Mar 7, 2003

10/383976

Siavash Alamouti - Kirkland WA, US
Eduardo F. Casas - Vancouver, CA
Michael Hirano - Redmond WA, US
Elliott Hoole - Redmond WA, US
Mary Jesse - Issaquah WA, US
David G. Michelson - North Vancouver, CA
Patrick Poon - Redmond WA, US
Gregory J. Veintimilla - Redmond WA, US
Hongliang Zhang - Redmond WA, US

Cingular Wireless II, LLC - Redmond WA

H04Q007/00

370330, 370203, 370281, 370206, 370329, 370336, 370337, 370343, 370344, 370321, 375267, 375347, 375299

The high quality PCS communications are enabled in environments where adjacent PCS service bands operate with out-of-band harmonics that would otherwise interfere with the system's operation. The highly bandwidth-efficient communications method combines a form of time division duplex (TDD), frequency division duplex (FDD), time division multiple access (TDMA), orthogonal frequency division multiplexing (OFDM), spatial diversity, and polarization diversity in various unique combinations. The method provides excellent fade resistance. The method enables changing a user's available bandwidth on demand by assigning additional TDMA slots during the user's session.