Question

Difference between coherent detection and noncoherent fh systems

Answer 1

An estimate of the channel phase and attenuation is recovered. It is then possible to reproduce the transmitted signal and demodulate.

•Requires a replica carrier wave of the same frequency and phase at the receiver.

•The received signal and replica carrier are cross-correlated using information contained in their amplitudes and phases.

•Also known as synchronous detection

Non-coherent detection:

•Requires no reference wave; does not exploit phase reference information (envelope detection)

•Differential Phase Shift Keying (DPSK)

Frequency Shift Keying (FSK)

Amplitude Shift Keying (ASK)

•Non coherent detection is less complex than coherent detection (easier to implement), but has worse performance.

Answer 2

Answer:

An estimate of the channel phase and attenuation is recovered. It is then possible to reproduce the transmitted signal and demodulate.

•Requires a replica carrier wave of the same frequency and phase at the receiver.

•The received signal and replica carrier are cross-correlated using information contained in their amplitudes and phases.

•Also known as synchronous detection

Non-coherent detection:

•Requires no reference wave; does not exploit phase reference information (envelope detection)

•Differential Phase Shift Keying (DPSK)

Frequency Shift Keying (FSK)

Amplitude Shift Keying (ASK)

•Non coherent detection is less complex than coherent detection (easier to implement), but has worse performance.

PLEASE MARK AS BRAINLIEST