Telecommunications – Transmitter – Diversity
Reexamination Certificate
2005-03-08
2005-03-08
Vuong, Quochien B. (Department: 2685)
Telecommunications
Transmitter
Diversity
C455S522000, C375S299000
Reexamination Certificate
active
06865377
ABSTRACT:
A method and apparatus are provided that can combine the benefits of beamforming with transmit diversity. In one embodiment, the invention includes sampling a signal received from a remote radio at elements of an antenna array, deriving spatial parameters for transmitting a signal to the remote radio from an antenna array, sampling the signal received from the remote radio at elements of at least one additional antenna array, and deriving spatial parameters for transmitting a signal to the remote radio from the at least one additional antenna array. The invention further includes generating diversity parameters for transmitting a signal to the remote radio using each antenna array as an element of a diversity array, and transmitting a signal to the remote radio using the spatial parameters and the diversity parameters.
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Pedersen and Mogensen, “A Simple Downlink Antenna Array Algorithm Based on a Hybrid Scheme of Transmit Diversity and Conventional Beamforming”, Nokia Networks, 2001 IEEE, pps 58-62.
Lindskog and Paulraj, “A Transmit Diversity Scheme for Channels with Intersymbol Interference”, Jun. 18-22, 2001, vol. 1, pp. 307-311.
Brunner Christopher
Kerr Adam B.
Lindskog Erik D.
Trott Mitchell D.
ArrayComm, Inc.
Vuong Quochien B.
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