Hi all,
In studying receivers architectures and demodulation techniques for many types of modulations, I am facing with a doubt about about matched filters, with impulse response \(h(t) = p(-t)\) where \(p(t)\) is the modulating pulse.
The question arise from an homework but mine doubt is related with theory, that's why I opened the thread in this section.
The question is: does the matched filter is used only in PAM demodulators, or also in PSK demodulators ?
The question arise because the homework I am solving is related with a QPSK modulation and demodulation, and has some questions related with matched filters on the receiver. For example:
"Determine the decoded complex values at the matched filter's output when there are not synchronization errors."
In QPSK modulation the information is carried through phase shift of the sinusoidal carrier rather than pulse amplitude,
so why is a matched filter is needed in a PSK receiver ?
Thank you in advance.
thumb2
In studying receivers architectures and demodulation techniques for many types of modulations, I am facing with a doubt about about matched filters, with impulse response \(h(t) = p(-t)\) where \(p(t)\) is the modulating pulse.
The question arise from an homework but mine doubt is related with theory, that's why I opened the thread in this section.
The question is: does the matched filter is used only in PAM demodulators, or also in PSK demodulators ?
The question arise because the homework I am solving is related with a QPSK modulation and demodulation, and has some questions related with matched filters on the receiver. For example:
"Determine the decoded complex values at the matched filter's output when there are not synchronization errors."
In QPSK modulation the information is carried through phase shift of the sinusoidal carrier rather than pulse amplitude,
so why is a matched filter is needed in a PSK receiver ?
Thank you in advance.
thumb2
