Method and apparatus for conversion of radio frequency (RF) and baseband signals

摘要

A signal convertor for modulating or demodulating an input signal x(t), comprising: a synthesizer for generating wideband mixing signals phi1 and phi2, which vary irregularly over time, where phi1*phi2 has significant power at the frequency of a local oscillator signal being emulated; a first mixer coupled to said synthesizer for mixing said input signal x(t) with said mixing signal phi1 to generate an output signal x(t) phi1; and a second mixer coupled to said synthesizer and to the output of said first mixer for mixing said signal x(t) phi1 with said mixing signal phi2 to generate an output signal x(t) phi1 phi2.