Demodulator with composite transversal equalizer and eye detection clock synchronizer

Abstract From the Canadian patent

In a digital demodulator a recovered baseband signal is sampled in response to a clock pulse supplied from a VCO and converted to a digital signal representing one of multilevels of the sampled signal. Real-axis and imaginary-axis transversal equalizers are provided. Each equalizer has a tapped delay line for receiving the digital signal a plurality of tap weight, multipliers connected respectively to taps of the tapped delay line and an, adder. The adder of the real-axis transversal equalizer sums all outputs of the tap weight multipliers except for the output of one which is connected to a tap adjacent to the center tap for producing a partially equalized signal, while the adder of the …