Pulse or digital communications – Spread spectrum
Reexamination Certificate
2007-02-13
2007-02-13
Tran, Khai (Department: 2611)
Pulse or digital communications
Spread spectrum
C343S853000
Reexamination Certificate
active
10370473
ABSTRACT:
An apparatus and method in which a base station transmitter transmits the common beam to all mobile stations in a base station via an antenna array having at least two antennas, and forms a traffic beam according to a position of each mobile station. The base station transmitter determines a weight vector of the traffic beam based on a position of each mobile station. The base station transmitter calculates a common beam weight vector for all angles in order to minimize a difference between a power of a signal received at the mobile station through the antenna array and a template function of the antenna arrayat all angels; calculates a traffic beam weight vector in order to minimize a reception power difference between a traffic beam to be transmitted to a position of the mobile station and the common beam, based on the calculated common beam weight vector; multiplies the calculated traffic beam weight vector by a signal to be output to the antenna array; and transmits the traffic beam to the mobile station.
REFERENCES:
patent: 7039363 (2006-05-01), Kasapi et al.
patent: 2002/0000948 (2002-01-01), Chun et al.
Chun Byung-Jin
Yoon Soon-Young
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