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Discrete representation of signals

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2 Author(s)
Oppenheim, A.V. ; Massachusetts Institute of Technology, Cambridge, Mass. ; Johnson, D.H.

In processing continuous-time signals by digitalmeans, it is necessary to represent the signal by a digital sequence. There are many ways other than periodic sampling for obtaining such a sequence. The requirements for such representations and some examples are discussed within the framework of simulating linear time-invariant systems. The representation of digital sequences by other digital sequences is also discussed, with particular emphasis on the use of such representations to implement a nonlinear warping of the digital frequency axis. Some applications and hardware implementation of this digital-frequency warping are described.

Published in:

Proceedings of the IEEE  (Volume:60 ,  Issue: 6 )

Date of Publication:

June 1972

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