Howtosignalprocessing
- Which is problem of a demodulation?
- What is demodulated output?
- What is phase error signal?
- How the carrier is removed at the output in demodulation?
Which is problem of a demodulation?
The research showed that the major problems in the cause of these modulation and demodulation include electrical equipment interference, radio communication interference, weather/atmospheric interference, co-channel interference, impulse interference, near/far problem, ghosting, distorted “S” sound, twittering or ...
What is demodulated output?
Demodulation is extracting the original information-bearing signal from a carrier wave. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave.
What is phase error signal?
Phase Err (Phase Error) is the phase difference between the I/Q reference signal and the I/Q measured signal, averaged over all symbol points. The magnitude of this error data is an indicator of the quality of the phase component of the modulated signal.
How the carrier is removed at the output in demodulation?
It is essential that the phase of the carrier and added signal are locked in. This results in shifting the spectrum of the modulation signal (autocorrelation function) to its original position on the frequency axis. The signal is then low pass filtered to remove the carrier signal (see Figure 6.4C).
