Howtosignalprocessing
- What causes phase distortion?
- What is an IQ demodulator?
- Is there any correlation between phase and distortion signal?
- What do you know about phase distortion of a signal?
What causes phase distortion?
Phase distortion results when different frequencies travel at different signal velocities due to dielectric dispersion in the PCB substrate. Because the dielectric constant varies with frequency, the signal velocity also varies with frequency.
What is an IQ demodulator?
Concept of IQ-modulation and IQ-demodulation. An IQ-demodulator achieves perfect reconstruction of I(t) and Q(t) by exploiting the quadrature phase relation between sI(t) and sQ(t). The frequency-domain representation of a -90o phase shift corresponds to multiplication by the Hilbert transform: ..
Is there any correlation between phase and distortion signal?
If the phase shift is uniform with respect to frequency, a modulated signal will not be distorted, but if the phase shift is nonlinear with respect to frequency, the output signal is distorted compared to the input.
What do you know about phase distortion of a signal?
In signal processing, phase distortion or phase-frequency distortion is distortion, that is, change in the shape of the waveform, that occurs when (a) a filter's phase response is not linear over the frequency range of interest, that is, the phase shift introduced by a circuit or device is not directly proportional to ...
