Telecommunications – Transmitter – With feedback of modulated output signal
Reexamination Certificate
2006-02-07
2006-02-07
Urban, Edward F. (Department: 2685)
Telecommunications
Transmitter
With feedback of modulated output signal
C455S068000, C455S108000, C375S297000
Reexamination Certificate
active
06996382
ABSTRACT:
A burst transmitter is obtained which, when a constant envelope modulation is used, can control the envelope of a transmission output power by controlling a baseband signal without causing the spreading of the spectrum. A transmission output power control device includes: an I/Q signal amplitude control unit (101) for variably controlling the shape of a rise and a fall of the waveform of a baseband signal and its burst transmission time from the end of the rise to the beginning of the fall in accordance with a modulation system signal; a modulating unit (2003) for modulating the baseband signal controlled in the I/Q signal amplitude control unit (101) into a high-frequency signal for transmission in accordance with the modulation system signal; an amplifier (2004) for amplifying the transmission high-frequency signal modulated in the modulating unit (2003); and a control voltage signal selecting unit (102) for outputting a predetermined constant voltage which is determined by the modulation system signal and a transmission power level signal, so as to control the output power of the amplifier.
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Nguyen Thuan T.
Urban Edward F.
LandOfFree
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