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What is in a lens?
Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.
Who can create a lens?
Any individual Connexions member, a community, or a respected organization.
A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.
What is in a lens?
Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.
Who can create a lens?
Any individual Connexions member, a community, or a respected organization.
Summary: Details the discrete-time fourier transform.
Discrete-Time Fourier Transform
Xω=∑n=-∞∞xnⅇ-ⅈωnXωnxnωn(1)
Inverse Discrete-Time Fourier Transform
xn=12π∫02πXωⅇⅈωndωxn12ω02Xωωn(2)
Relevant Spaces
The Discrete-Time Fourier
Transform maps infinite-length,
discrete-time signals in
l2l2
to finite-length (or
2π2-periodic), continuous-frequency
signals in
L2L2.
Figure 1:
Mapping
l2ℤl2
in the time domain to
L202πL202
in the frequency domain.
"My introduction to signal processing course at Rice University."