At&t Mobility II LLC

At&t Wireless Services, Inc.

Cingular Wireless Ii, LLC

Patrick Poon

Siavash Alamouti

Hongliang Zhang

Elliott Hoole

Michael Hirano

Eduardo F Casas

Mary Jesse

Gregory J Veintimilla

David G Michelson

Vahid Tarokh

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.

Method for frequency division duplex communications

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.

Low complexity maximum likelihood detection of concatenated space codes for wireless applications

Low complexity maximum likelihood detection of concatenate space codes for wireless applications

Low complexity maximum likelihood detecting of concatenated space codes for wireless applications

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Redmond, WA, United States of America

Patrick Poon