Title:
DesignandFPGAImplementationof
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Description: In most cases, a bandpass filter characteristic
is obtained by using a lowpass-to-bandpass frequency
transformation on a known lowpass transfer function. This
frequency transformation controls the location of passband
edges and transfer zero frequencies completely. Using the
“Vlach-Chebyshev approximation” [1] however, we are
able to specify the (Chebyshev) passband limits directly,
together with a free choice of transfer zero locations in the
stopband. In this way it is possible to design bandpass
transfer functions that cannot be obtained from lowpass
functions by a frequency transformation. We think this
method to be the only (and not very well known) analytical
method to obtain such bandpass characteristics. We show
how we designed wave digital realizations from the specification,
through a VHDL description and synthesis into a
Xilinx FPGA (Virtex-II).
File list (Check if you may need any files):
DesignandFPGAImplementationof.pdf
