Modulator/transmitter apparatus and method

Details Modulator/transmitter apparatus and method Modulator/transmitter apparatus and method

2007-10-30

2007-10-30

Ghayour, Mohammed (Department: 2611)

Pulse or digital communications

Transmitters

C375S261000, C375S279000, C375S298000

Reexamination Certificate

active

10505692

ABSTRACT:
Method and apparatus for providing an amplified modulated radio frequency signal, the method comprising the steps of providing a radio frequency (RF) oscillatory signal, generating from the RF oscillatory signal and an input signal a pair of phase modulated phase conjugated signals, and summing the pair of signals to provide the desired modulated RF signal output. A form of the invention is applied to digital modulation using in-phase (I) and quadrature (Q) input signals. Each of the I and Q signals is processed in a respective channel, with the channel outputs being summed. The channels share an RF oscillatory signal, which is phase shifted by 90 degrees within the Q channel.

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