Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 1 (Q.No. 13)
13.
Non-coherently detection is not possible for
Discussion:
14 comments Page 1 of 2.
Chandika mohan said:
1 decade ago
With respect to phase when we talk, detection is random in nature and mapping of information cannot be done correctly, so we need exact estimation and detection process.
ARCHANA JHA said:
1 decade ago
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.
(1)
Amit Kumar Pandit said:
1 decade ago
Because in PSK modulation technique the phase of the modulated is changed according to the phase of the baseband signal.
Gaurav said:
1 decade ago
It is not possible because the imprint of the data lies in phase itself.
Megha mahapatra said:
10 years ago
Phase always indicates the exact position of the signal. So we need exact phase we need synchronous the modulation.
ELDHO P SUNNY said:
9 years ago
When the receiver exploits knowledge of the carrier's phase to detect the signal. The process is called coherent detection.
Sambhu Garai said:
9 years ago
Non-coherent systems do not need carrier phase information which is not possible for PSK.
Shubh said:
9 years ago
Coherent means narrow sharp wavelength in which is observed in PSK signals.
Prashantadhikari said:
9 years ago
For non-coherent detection, information should be send in amplitude and frequency. If we send information in phase the carrier is not recovered at the receiver and in PSK information is send in phase.
Arnabbanerjee said:
8 years ago
Non-coherent detection process doesn't need receiver to be phase locked with transmitted carrier. As the main objective is phase itself, so how could we determine PSK!
(1)
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