Non coherent detection BFSK demodulation?

1. What is non-coherent detection?
2. Why non-coherent detection is not possible in PSK?
3. What is non-coherent detection of FSK?
4. What is BFSK modulation and demodulation?

What is non-coherent detection?

Non-coherent means optical transmission system does not require coherent local oscillator light; Coherent means optical transmission system that uses local oscillator light for coherent detection.

Why non-coherent detection is not possible in PSK?

Non-coherent detection is not possible because at the receiver end the same frequency should be used as that of at the transmitter end, And coherency maintenance is must. Because in PSK modulation technique the phase of the modulated is changed according to the phase of the baseband signal.

What is non-coherent detection of FSK?

As an example, the performance of a noncoherent frequency shift-keyed (FSK) system is analyzed exactly under the influence of an additive Gaussian noise in the presence of multipath fading. These performances are compared to those of the approximately analyzed cases where the sampling representation technique was used.

What is BFSK modulation and demodulation?

Binary Frequency Shift Keying (BFSK) is a type of digital modulation technique in which we are sending one bit per symbol i.e., '0' or a '1'. Hence, the bit rate and symbol rate are the same. In BFSK, the information is encoded in the variation of the frequency of the carrier.