Which of the shift keying technique is best in terms of noise immunity and bandwidth requirements ?Group of answer choicesFSKASKPSK

To determine which shift keying technique is best in terms of noise immunity and bandwidth requirements, we need to compare FSK (Frequency Shift Keying), ASK (Amplitude Shift Keying), and PSK (Phase Shift Keying).

1. FSK (Frequency Shift Keying): In FSK, different frequencies are used to represent different digital symbols. It offers good noise immunity as it is less affected by amplitude variations. However, FSK requires a wider bandwidth compared to other techniques.

2. ASK (Amplitude Shift Keying): ASK uses different amplitudes to represent different digital symbols. It is susceptible to noise and interference, which can affect the accuracy of the received signal. ASK requires a relatively narrow bandwidth.

3. PSK (Phase Shift Keying): PSK uses different phase shifts to represent different digital symbols. It offers good noise immunity as it is less affected by amplitude variations and can handle interference better than ASK. PSK requires a moderate bandwidth.

Considering the criteria of noise immunity and bandwidth requirements, PSK is generally considered the best shift keying technique. It provides good noise immunity and requires a moderate bandwidth, making it a suitable choice for many communication systems.