Pitch determination and voice quality analysis using subharmonic-to-harmonic ratio. There are also some post-processing routines available, such as de-step filter, median filter, and linear filter
A 320 GHz fully integrated terahertz imaging system is reported. The system is composed of a phaselocked high-power transmitter and a coherent high-sensitivity subharmonic-mixing receiver, which are fabricated using a 130 nm SiGe BiCMOS technology (
