Pass band implementation of Amplitude shift keying, Frequency Shift Keying, Binary Phase Shift Keying: Generation and Detection
In coherent passband FSK systems, what is the most significant technical challenge that must be addressed in high-mobility wireless environments?
Why does passband ASK perform poorly in environments with multipath fading and Doppler effects?
Among passband ASK, FSK, and PSK, which is the most bandwidth-efficient under ideal channel conditions and why?
What is the practical limitation of increasing the number of phase states in a passband PSK system?
Why is non-coherent FSK preferred in low-complexity wireless sensor nodes despite slightly worse BER than coherent FSK?
Why is PSK considered more power-efficient than FSK or ASK under the same bandwidth constraints in a passband system?
In which scenario would passband FSK be preferred over PSK for digital communication?
Why does the BER increase in higher-order passband PSK systems such as 8-PSK or 16-PSK?
Why is ASK rarely used in modern passband wireless systems, even though it’s simple to implement?
Which of the following will **most effectively** improve the performance of a passband PSK system in a fading channel?