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2. Double-sideband suppressed-carrier transmission - Wikipedia

   en.wikipedia.org/wiki/Double-sideband_suppressed...

   DSB-SC is basically an amplitude modulation wave without the carrier, therefore reducing power waste, giving it a 50% efficiency. This is an increase compared to normal AM transmission (DSB) that has a maximum efficiency of 33.333%, since 2/3 of the power is in the carrier which conveys no useful information and both sidebands containing identical copies of the same information.

3. Double-sideband reduced-carrier transmission - Wikipedia

   en.wikipedia.org/wiki/Double-sideband_reduced...

   Double-sideband reduced carrier transmission (DSB-RC): transmission in which (a) the frequencies produced by amplitude modulation are symmetrically spaced above and below the carrier and (b) the carrier level is reduced for transmission at a fixed level below that which is provided to the modulator.

4. DSBSC - Wikipedia

   en.wikipedia.org/?title=DSBSC&redirect=no

   Download as PDF; Printable version; From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Double-sideband suppressed-carrier transmission;

5. Reduced-carrier transmission - Wikipedia

   en.wikipedia.org/wiki/Reduced-carrier_transmission

   Reduced-carrier transmission is an amplitude modulation (AM) transmission in which the carrier signal level is reduced to reduce wasted electrical power. Suppressed-carrier transmission is a special case in which the carrier level is reduced below that required for demodulation by a normal receiver .

6. List of amateur radio modes - Wikipedia

   en.wikipedia.org/wiki/List_of_amateur_radio_modes

   The first such analog modulating waveforms applied to radio carriers were human voice signals picked up by microphone sensors and applied to the carrier waveforms. The resulting analog voice modes are known today as: Amplitude modulation (AM) Double-sideband suppressed carrier (DSB-SC) Independent sideband (ISB) Single sideband (SSB)

7. Costas loop - Wikipedia

   en.wikipedia.org/wiki/Costas_loop

   A Costas loop is a phase-locked loop (PLL) based circuit which is used for carrier frequency recovery from suppressed-carrier modulation signals (e.g. double-sideband suppressed carrier signals) and phase modulation signals (e.g. BPSK, QPSK). It was invented by John P. Costas at General Electric in the 1950s.

8. Armstrong phase modulator - Wikipedia

   en.wikipedia.org/wiki/Armstrong_phase_modulator

   In the Armstrong method, the audio signal and the radio frequency carrier signal are applied to the balanced modulator to generate a double sideband suppressed carrier signal. The phase of this output signal is then shifted 90 degrees with respect to the original carrier. The balanced modulator output can either lead or lag the carrier's phase.

9. FM broadcasting - Wikipedia

   en.wikipedia.org/wiki/FM_broadcasting

   The (L−R) signal, which is also limited to 15 kHz, is amplitude modulated onto a 38 kHz double-sideband suppressed-carrier (DSB-SC) signal, thus occupying 23 kHz to 53 kHz. A 19 kHz ± 2 Hz [ 13 ] pilot tone , at exactly half the 38 kHz sub-carrier frequency and with a precise phase relationship to it, as defined by the formula below, is also ...