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- The rapid changing, as opposed to long-term drifting, of the frequency of an electromagnetic wave. Note: Chirping is most often observed in pulsed operation of a source. 2. A pulse compression technique that uses (usually linear) frequency modulation during the pulse.
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- adaptive differential pulse-code modulation (ADPCM), carrier (cxr), Di Group, digital modulation, hop, multipulse test signal, pulse-amplitude modulation (PAM), pulse carrier, pulse-duration modulation (PDM), pulse-frequency modulation (PFM), pulse-interval modulation, pulse-length modulation, pulse link repeater (PLR), pulse-position modulation (PPM), pulse-repetition-rate modulation, pulse-time modulation (PTM), pulse-width modulation (PWM), pulsed FM systems, sub-band adaptive differential pulse code modulation (SB-ADPCM)