Telecommunications – Transmitter – Plural separate transmitters or channels
Reexamination Certificate
2005-06-08
2008-08-05
Urban, Edward (Department: 2618)
Telecommunications
Transmitter
Plural separate transmitters or channels
C455S115100, C455S115200, C375S267000, C375S299000
Reexamination Certificate
active
07409191
ABSTRACT:
A transmitting apparatus includes a plurality of antenna elements, user signal output unit, calibration signal generation unit, antenna signal processing unit, and total transmission power measuring unit. The user signal output unit weights a user signal by an antenna weight and outputs it to each antenna element. The calibration signal generation unit outputs a calibration signal to be used to detect the characteristic of a transmission path. The antenna signal processing unit provided in the transmission path executes spread modulation and multiplexing for the user signal and calibration signal and outputs a multiplexed signal. The total transmission power measuring unit measures the value of total transmission power of the multiplexed signal to be transmitted from each antenna element on the basis of the multiplexed signal input from the antenna signal processing unit. An antenna weight correction unit executes a correction operation on the basis of the total transmission power value.
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Chow Charles
Dickstein & Shapiro LLP
NEC Corporation
Urban Edward
LandOfFree
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