I have scoured my entire library and I can't find where I read about a method of using symbol energy intentionally smeared across multiple bit times in such a way that the symbols can be recovered correctly. Can someone point to any of the classic digital modulation books I am likely to have in my library where I would have read about this technique? I seem to recall it was a part of minimum shift keying techniques. It is frustrating that I can remember one or two of the figures but can't place where I read it.



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    $\begingroup$ Are you thinking of partial response signaling? It's related to continuous phase modulation. There's a chapter about it in Proakis. $\endgroup$
    – MBaz
    Sep 13, 2017 at 19:14
  • $\begingroup$ I think it is too, still qualifies for an answer even though it is short @MBaz and it would also "close" the question gracefully. $\endgroup$
    – A_A
    Sep 14, 2017 at 9:48
  • $\begingroup$ @A_A It's done :) $\endgroup$
    – MBaz
    Sep 14, 2017 at 13:02

1 Answer 1


The most likely possibility is that you're thinking of partial response signaling, of which GMSK is a special case. This is covered in many textbooks, e.g. in Proakis.

  • $\begingroup$ Thanks y'all. That is sufficient information to continue my search. That is exactly what I was thinking of. How do I mark this question as answered? MBaz, thanks for the link. $\endgroup$
    – RMack
    Sep 14, 2017 at 21:12
  • $\begingroup$ @RMack I'm glad I could help. You should be able to click on the up arrow and the check mark on the answer's left-hand side. $\endgroup$
    – MBaz
    Sep 14, 2017 at 21:37

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