The demodulation process for AM where the radio frequency signal is converted into an ... Figure 3-9. Block diagram of an FM quadrature detector. Modulation index and deviation ratio In many instances ...

Fundamental to all wireless communications is modulation, the process of impressing the data ... include amplitude-shift keying (ASK), frequency-shift keying (FSK), and phase-shift keying (PSK).

The upper diagram marks a ~1.1-m strained ... system that uses two frequency-modulated lasers. By scanning the relative modulation phase between the pump and reference lasers, the setup measures ...

Scientists have developed a dual-laser Brillouin optical correlation-domain reflectometry (BOCDR) system that uses two frequency-modulated lasers. By scanning the relative modulation phase between ...