Patent ID: 7386286
Filing Date: 2008-06-10
Classification: H03D,H03L

Abstract:
1. A method for providing frequency discrimination/comparison and phase detection/comparison using complex single side-band (SSB) down conversion, the method comprising: receiving a local oscillator (LO) of frequency ω receiving a carrier signal of carrier frequency ω multiplying each of said in-phase and quadrature LO signals with each of said in-phase and quadrature carrier signals, thereby generating four converted signals; combining in two pairs said four converted signals, to produce the in-phase LSB signal and the quadrature LSB signal; delaying one of said LSB signals by a time delay τ to produce a delayed LSB signal; multiplying said delayed LSB signal with said other LSB signal, to produce the baseband signal BB(t); and outputting said baseband signal BB(t), wherein said signal BB(t) has a DC voltage component substantially proportional to a frequency difference ω