Patent ID: 8476985
Filing Date: 2013-07-02
Classification: H03C,H04L

Abstract:
1. A method, comprising: generating a frequency-modulated signal from an input signal using a frequency modulator, wherein the frequency-modulated signal is with a first carrier of an arbitrary fixed carrier frequency and wherein said first carrier is generated using an RF generator operating at said arbitrary fixed carrier frequency; vectorially converting the frequency-modulated signal into IQ signals, said conversion comprising demodulating the frequency-modulated signal using an IQ demodulator driven by the same RF generator, wherein circuit path of the frequency-modulated signal is separate from the circuit path from the RF generator to the IQ demodulator; and combining the IQ signals with a second carrier of a desired carrier frequency through IQ modulation to form a frequency-modulated output signal, wherein the desired carrier frequency of the second carrier is adjustable within a wide frequency range; wherein an amplitude modulation occurs upstream of the vectorial converting during an amplitude modulation of the frequency modulated signal with an amplitude modulation signal, and wherein an amplitude modulation also occurs in I and Q branches between the vectorial converting and the IQ modulation.