Low complexity design of variable bandedge linear phase FIR filters with sharp transition band
This paper presents a very low-complexity design of variable bandedge linear phase finite-impulse-response (FIR) filters with fixed sharp transition width. The idea is to first decompose the input signal into several channels in the frequency domain....
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Main Authors: | , , |
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Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2010
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Subjects: | |
Online Access: | https://hdl.handle.net/10356/91837 http://hdl.handle.net/10220/6247 |
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Institution: | Nanyang Technological University |
Language: | English |
Summary: | This paper presents a very low-complexity design of
variable bandedge linear phase finite-impulse-response (FIR) filters
with fixed sharp transition width. The idea is to first decompose
the input signal into several channels in the frequency domain.
The channel(s) involved with the transition band of the variable
filter due to the variation of the bandedge is (are) shaped to produce
the required transition band, and then summed up with the
channels involved with the passband of the variable filter to produce
the required frequency response. The proposed variable filter
has extremely low complexity when the transition band is sharp, if
compared with other techniques such as the Farrow structure. It is
possible that the computational complexity of the variable filter is
even lower than that of a corresponding fixed filter with the same
transition width and ripple specifications implemented in its direct
form. |
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