Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-08-15
2006-08-15
Ha, Dac V. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S146000, C375S148000, C375S267000, C375S347000, C370S320000, C370S465000, C370S479000, C455S059000, C455S065000, C455S101000, C455S137000, C455S272000
Reexamination Certificate
active
07092431
ABSTRACT:
A receiver, comprising a plurality of antennas configured to receive signals that are obtained by multiplying a plurality of data symbols transmitted over a plurality of data channels using spreading codes for each of the data channels, the data symbol being transmitted over a plurality of sub-carriers having different frequencies; a spreading code multiplier configured to multiply reception signals received by the plurality of antennas using spreading codes for the data channels corresponding to the reception signals; a weight controller configured to adjust antenna weights by which a reception signal received by each antenna is to be multiplied, and sub-carrier weights by which a reception signal received over each sub-carrier is to be multiplied; a weight multiplier configured to multiply the reception signals by the antenna weights and the sub-carrier weights adjusted by the weight controller; and a combining unit configured to combine the reception signals multiplied by the antenna weights and the sub-carrier weights at the weight multiplier among the antennas and over spreading code duration of the spreading codes.
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Abeta Sadayuki
Atarashi Hiroyuki
Maeda Noriyuki
Sawahashi Mamoru
Ha Dac V.
NTT DoCoMo Inc.
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