Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-09-06
2005-09-06
Vo, Don N. (Department: 2631)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
Reexamination Certificate
active
06940917
ABSTRACT:
Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband. The total transmit power is allocated to the subbands based on a particular power allocation scheme (e.g., full channel inversion, selective channel inversion, water-filling, or uniform). A scaling value is then obtained for each subband based on its allocated transmit power. Data to be transmitted is coded and modulated to provide modulation symbols. The modulation symbols to be transmitted on each subband are scaled with the subband's scaling value and further preconditioned with the subband's steering vector. A stream of preconditioned symbols is then formed for each transmit antenna.
REFERENCES:
patent: 6377631 (2002-04-01), Raleigh
patent: 6473467 (2002-10-01), Wallace et al.
patent: 2002/0154705 (2002-10-01), Walton et al.
patent: 2003/0108117 (2003-06-01), Ketchum et al.
patent: 02/05506 (2002-01-01), None
Howard Steven J.
Ketchum John W.
Menon Murali Paravath
Wallace Mark
Walton Jay Rod
Milikovsky Dmitry
Minhas Micky
Qualcomm Incorporated
Vo Don N.
Wadsworth Phillip
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