ASK is used to transmit digital data over optical fibre, to transmit moarse code etc
Binary (Bipolar) Phase Shift Keying.
Y=12sin(x(pi)) amplitude= 12 period = 2 phase shift = none or 0 vertical shift = none or 0
The SL100 is a PNP medium power transistor, suitable for use up to ~100MHz. This can be used in the power amplifier stage, with the output connected to a tuning network/transformer + antenna for AM modulation. It's purpose, if used in this application, is to supply current (usually a voltage amplifier circuit will precede this one) to drive the antenna.
in point to point millitary communications , earlier telephone modems etc....
One advantage is more bandwidth. A disadvantage is that the transmitted power is lower.
amplitude shift keying is a form of modulation in digital signal that variation in the amplitude of carrier wave. application of ask: *used mainly for radio frequencies
micxingthe between the phasr and frepaancy shift keying
Form of modulation that represents digital data as variations in the amplitude of a carrier wave Follow this link to get exact idea of Amplitude Shift Keying (ASK) http://www.circuitsgallery.com/2012/05/binary-amplitude-shift-keying-bask-or.html
Amplitude shift keying changes the height/power of the transmitted signal without altering the frequency. Frequency shift keying changes the frequency of the transmission without altering the height/power of the transmitted signal. Morse code is an example of amplitude keying where the amplitude is 0 or 100%. RTTY teleprinter uses FSK with two frequencies and the codes that represent text characters are sent with patterns of the two frequencies.
Amplitude shift keying (ASK) is simple to implement and requires less bandwidth compared to other modulation techniques. It is also less susceptible to noise interference, making it suitable for applications where signal clarity is important. Additionally, ASK is energy efficient as it allows for power conservation by varying amplitude levels.
Information transmission rate is higher. carrier power remain constant
QPSK = Quadrature Phase Shift Keying In QPSK amplitude are not much.so the carrier is constant. transmission rate is higher when compared with PSK
Amplitude
apa hubungan antara sinyal digital dan carrier dalam sinyal ASK?
Amplitude Shift Keying (ASK) encoding type easily has a nonzero average amplitude because it modulates the amplitude of the carrier signal to represent different symbols. This means that the signal always has a non-zero average amplitude.
Major disadvantage is that telephone lines are very susceptible to variations in transmission quality that can affect amplitude Ann
PSK (Phase Shift Keying) is advantageous over FSK (Frequency Shift Keying) and ASK (Amplitude Shift Keying) because it provides higher data rates and better spectral efficiency. PSK is less susceptible to noise and interference since phase changes are more discernible than frequency or amplitude changes. PSK also allows for easier implementation in digital communication systems.