A signal is said to be a band limited signal if all of it's frequency components are zero above a certain finite frequency. i.e it's power spectral density should be zero above the finite frequency.
1)Nonuniform probability distribution of speech amplitude. 2)Nonzero autocorrelation between successive speech samples. 3)Nonflat nature of the speech spectra. 4)The most basic:speech is band limited.
A carrier reinsertion oscillator is an electronic circuit used in a radio receiver that is designed to receive single side band carried suppressed radio transmissions. As suggested by the name, in a single side band carried suppressed signal, the carrier signal is suppressed (not transmitted) to save power and/or bandwidth. Before the single side band carried suppressed signal can be decoded to extract the original audio signal, the carrier must first be reinserted. This must be done accurately, otherwise the recovered audio signal will be unintelligible.
the high frequency, it is in VHF band.
Attenuator means which limits the voltage of a signal to some particular level but here filter attenuation means which limits some particular frequencies(i.e., particular Band)
When the modulating signal is greater than the carrier it can cause over modulation, that will cut of the peaks of the modulating signal and when detected by the receiver the final audio signal will also show the flat peaks and the results will be a distorted sound at the speaker. A 90% modulation is always better than a 100% modulation. In the case of frequency modulation it will cause the frequency to shift to much and will result in a to wide band and will cause adjacent channel interference, it can be so severe that a transmitter can occupy the whole spectrum of the band that is allocated for FM broadcasting.
No, a signal that is band limited is not time-limited while a signal that is time-limited isnot band limited.
A band-limited signal is one in which the Fourier transform is zero above a certain frequency. In other words it's a signal that ahas a finite frequency content. The simplest case is a pure sinusoidal signal, whose Fourier transform consists of a delta function centred on the frequency of the signal. A band-limited signal can be reconstructed exactly if it is sampled at at more than twice the maximum frequency present in the signal. A time-limited signal is a signal that is zero above a finite. An example of this would be a short pulse. The reason a signal cannot be both band-limited or time-limited is due to their relationship via the Fourier transform. One can show it is impossible for the Fourier transform of a signal with compact support ie either time or band-limited, to also have compact support. A time-limited signal must have a continuous frequency spectrum existing over all possible frequencies and a band-limited signal can only arise from signal existing for all time. Note this indicates in reality it is impossible to have a truly band-limited signal as it would take infinite time to transmit, but it is nonetheless a useful concept and we can produce nearly band-limited signal to a high degree of accuracy.
Narrow-Band (also referred to as short-wave) is a term used to describe the amplitude of a radio device. Narrow-band devices are limited to an average of 400m.
a drum signal is when the drummer of a band ques the rest of the band to come .
A time limited signal is one that is nonzero only for a finite length time interval.
It means the signal is not modulated.
A downlink signal; a Ka Band signal
A downlink signal A Ka Band signal
What is a power limited circuit
What is a power limited circuit
Out-of-band
A signal which has frequencies from 0 to some band-limited value B.ORwe can sy that baseband signal is a signal that can include frequencies that are very near zero, by comparison with its highest frequency(e.g: a sound waveform can be considered as a baseband signal, whereas a radio signal or any other modulated signal is not baseband.)