Which modulation requires highest transmission bandwidth?

Which modulation requires highest transmission bandwidth?

Explanation: BPSK requires more bandwidth than the other modulation techniques for the given level of spectral density.

Why is amplitude modulation necessary?

To make the transmission possible, modulation was introduced, i.e., multiplying the message by a periodic signal such as a cosine ⁡ ( Ω 0 t ) , the carrier, with a frequency much larger than those in the acoustic signal. Amplitude modulation provided the larger frequencies needed to reduce the size of the antenna.

Why is amplitude modulation preferable in picture signal transmission?

Amplitude Modulation (AM) is preferred for picture transmission in TV because of the following reasons: The distortion which arises due to interference between multiple signals is more in FM than AM because the frequency of the FM signal continuously changes. If AM were used, the ghost image, if produced is steady.

Which of the following is not purpose of modulation?

Correct Option: D. Increase in signal power is not the purpose of modulation.

What is the function of modulator?

A modulator is an electronic circuit that superimposes a low-frequency (information) signal onto a high-frequency (carrier) signal for the purpose of wireless transmission. The reason for this is that higher frequency signals can be received using shorter aerials, which are more practical than longer ones.

Which modulation technique requires more power?

For such optical links, the BPSK format are often believed to be the most power efficient one—i.e., the modulation format requiring the lowest signal-to- noise ratio (SNR) per bit to reach a given bit error rate (BER).

Which modulation scheme has the highest spectral efficiency?

While Multiple Phase Shift Keying (M-PSK) is much more spectrally efficient, the greater the number of smaller phase shifts, the more difficult the signal is to demodulate in the presence of noise.

What is modulation and its advantages?

Advantages of Modulation Antenna size gets reduced. No signal mixing occurs. Communication range increases. Multiplexing of signals occur. Adjustments in the bandwidth is allowed.

Why is scanning necessary for transmission?

Why is scanning necessary in television system? Scanning is the important process carried out in a television system in order to obtain continuous frames and provides motion of picture. As a result sufficient number of complete picture of frames per second is obtained to give the illusion of continuous motion.

What is the condition for greatest output power at the transmitter without distortion?

Explanation: When the modulation index is 1 or the percentage of modulation is 100, modulating signal voltage is equal to the carrier voltage. This results in the greatest output power at the transmitter and the greatest output voltage at the receiver, with no distortion.