File talk:QAM receiver.svg

Nice illustration! A few comments:

Mange01 (talk) 12:10, 16 July 2008 (UTC)
 * To my understanding, the "blocks" containing plots are not processing the signals, and should therefore not be shown as separate blocks. The plots may be shown inside or outside the filter blocks and A/D blocks, since the plots describe the characteristics of these blocks.
 * Since this receiver includes ADC:s, I assume that this is digital QAM. Then the h(F) block actually is an integrator that is "emptied" in the beginning of each symbol, and sampled in the end of each symbol, thus calculating the average voltage during the symbol. An Integration block, followed by a sampling block, is the most common notation of that in the literature.
 * I miss a band-pass filter to the left, which also may act as a matched filter or an adaptive equalizer.
 * If this is an all digital implementation (except for the band-pass filter i suggested above), an ADC would be the first block after the band-pass filter. But that does not have to be shown in the illustration. What you call ADC should be replaced by a "QAM symbol mapper" or quantisizer.
 * A generic QAM detector, that also can be used in analog QAM (for example for detection of the TV color signal) should be very simple, without any ADC or quantisizer.