Method and apparatus for transmitter calibration

Details Method and apparatus for transmitter calibration Method and apparatus for transmitter calibration

2005-12-14

2009-11-24

Dao, Minh D (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S013400, C455S574000, C455S114300, C455S127100, C455S127500, C455S186200

Reexamination Certificate

active

07623886

ABSTRACT:
A method and apparatus of calibrating a transmitter are disclosed. The method includes attenuating transmitter output signals as controlled by an output control signal, ensuring that an average power of the transmitter output signals is below a threshold level, and performing calibration of the transmitter at periods of time in which the output control signal is attenuating the transmitter output signals a lesser amount. The lesser amount can be less than an average of a minimum amount of attenuation and a maximum amount of attenuation. The apparatus includes a transmitter that includes a frequency up-converting LO mixer for frequency up-converting base band signals, generating transmitter output signals, a transmitter antenna for transmitting the transmitter output signals, and control circuitry for controlling attenuating the transmitter output signals during a calibration of the transmitter.

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