Coherent

Non Coherent BPSK with no Channel State Information at the receiver

Non Coherent BPSK with no Channel State Information at the receiver
  1. Why non-coherent detection is not possible for BPSK?
  2. Is BPSK coherent or non-coherent?
  3. What is non-coherent detection?
  4. What is coherent BPSK in digital communication?

Why non-coherent detection is not possible for BPSK?

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.

Is BPSK coherent or non-coherent?

This indicates that the traditional coherent or non-coherent receiver is completely failed under fast fading. In this section, we present a non-coherent BPSK modulation and demodulation scheme and compare the proposed scheme and the previous ones analytically in terms of BER.

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.

What is coherent BPSK in digital communication?

Binary Phase Shift Keying BPSK

This is also called as 2-phase PSK or Phase Reversal Keying. In this technique, the sine wave carrier takes two phase reversals such as 0° and 180°. BPSK is basically a Double Side Band Suppressed Carrier DSBSC modulation scheme, for message being the digital information.

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