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ECE 425
Digital Signal Processing
Fall 2009
The following is a list of topics and concepts in the material which exam 2 will cover. This is a
comprehensive listing of what we’ve done; obviously the exam cannot test everything and
appearance of a concept on this sheet does not guarantee it will appear on the exam.
Coverage is comprehensive and covers homeworks 1-8 and labs 1 and 2.
Relationships between the CTFT, the non-normalized DTFT, and the (regular) DTFT.
Relationship between the DT frequency variable
and the CT frequency variable
. Aliasing.
When can the original CT signal be perfectly recovered from the samples? Ideal sampling — what
does the non-normalized DTFT look like and what is the equation that describes this? How is the
DTFT related and what is the equation that relates it to the CTFT? Understand the techniques used
in the practical sampling derivations. Integrated sampling.
Ideal interpolation and practical interpolation — understand these in both the time and

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