modulated carrier การใช้

• This interrupted carrier may be analyzed as an AM-modulated carrier.
• An example of the modulated carrier is shown in the accompanying figure.
• Power line communication systems operate by impressing a modulated carrier signal on power wires.
• This principle of using two independently modulated carriers is the foundation of quadrature modulation.
• The measuring of signals with steady modulation is bound to the bandwidth of the modulated carrier.
• The tag uses the un-modulated carrier signal as a phase reference for demodulating the data signal.
• Similarly, additional baseband signals are used to modulate carriers at other frequencies, creating other channels of information.
• FEC processing in a receiver may be applied to a digital bit stream or in the demodulation of a digitally modulated carrier.
• For a PJM signal the un-modulated carrier component powers the passive tag and the low level modulated component conveys data to the tag.
• Modulated carriers can be dynamically altered in response to rain problems or other link impairments using a process called adaptive coding and modulation, or " ACM ".
• With typical constraints on the two amplitude modulation waveforms, quadrature modulation can result in a single constant-envelope, phase-modulated carrier described mathematically by the trigonometric identity:
• In radio communications, for example, bandwidth is the frequency range occupied by a modulated carrier signal, whereas in optics it is the width of an individual spectral line or the entire spectral range.
• Q15X25 is a digital signal processor-intensive mode designed to pass AX . 25 packets on HF with speed and reliability much greater than traditional HF QPSK modulated carriers separated by 125 Hertz, each modulated at 83.333 baud.
• The maximum legal CB power output level in the U . S . is 4 watts for AM ( un-modulated carrier; modulation can be four times the carrier power, or 16 watts SSB, as measured at the transmitter antenna connection.
• For a PJM signal the powering signal and the modulated data signal components are decoupled allowing the spectrum of the PJM signal to be matched to the spectral mask defined under these regulations by suitable amplitude adjustment of the un-modulated carrier and encoding and / or filtering of the modulated data signal.