Miniproject: QPSK Digital Transmitter/Receiver

Basically, it takes the previous sample, and the next sample and subtracts them. Ideally, if the on time sample was at a peak of the match filter output, then the early and late sample would be equal. However, if this is not the case, then the difference between the early and late is multiplied by the on time sampling value and summed together. ................
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