A low frequency signal cannot br transmitted to long distance vecause of many practical difficulties. On the other hand, effective transmission is possible at high frequencies. So, modulation is always done in communication systems.
PSK conveys data by modulating the carrier signal's phase and alters the sine and cosine inputs at precise times. PSK is most widely used for wireless LANs,RFIDand Bluetooth communications. The demodulator determines the phase of the received signal and translates it back to the symbol it repre...
A signal is defined as a signal valued fraction of time (that convey the informational )and which, at every instant of time has a unique value
This filtering stage before modulating the signal is also called pulse shaping as the data pulses are filtered out to produce a clean output signal with sharp rise and fall times, which helps in accurately determining the carrier frequency of the received signal. GFSK technique is useful and used...
However as there now are more efficient and convenient methods of modulating a signal, its use is declining, although it will still be very many years before it is no longer used.Many of the more efficient methods of modulating signals are based around AM: single sideband and quadrature ...
Basically, what the modem does is take the digital signal from the computer and add it on top of an analog telephone signal (i.e., modulates it) so that it can be transferred through the telephone line. Since your modem sends information through a telephone line by modulating digital signa...
[21]. Yin H, Li L, Feng X, et al. 2D4, a humanized monoclonal antibody targeting CD132, is a promising treatment for systemic lupus erythematosus. Signal Transduct Target Ther. 2024;9(1):323. [22]. Wang L, Yin H, Jiang J, ...
Modulation is the use of one electrical signal to “control” a primary variable of another. For example, if an audio signal voltage is used to control the “amplitude” of a carrier signal, the result is amplitude modulation.It is important that you do not confuse “mixing” with “modulat...
Through adept supervision of both regenerative and conventional braking systems, hydraulic control units play a central role in improving the energy efficiency of electric vehicles, ultimately optimizing their range and overall performance. By strategically controlling and modulating braking processes, hydraulic...
A VCO or voltage-controlled oscillator is an electronic oscillator whose output frequency is generated using an electronic circuit. They can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input. A VCO is also an integral part of ...