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(→Make a page about interpolating FIR filters. Take care to note how many multiply/add operations.) |
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===Make a page about interpolating FIR filters. Take care to note how many multiply/add operations.=== |
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<math> \sum_{m=-M}^m a_{m}x[(r-m)T/2]=y(r) </math> |
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An interpolting filter is when you create "in-between" samples from the original sample resulting as if you had sampled the signal at a higher rate. Interpolation only works with integers. |
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The number of add/multiply operations is half the limits of the sumation above. Half results from only needing to perform calculations on half the data. |
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The are under the rth impulse function of the interpolated signal is |
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<math>(2M+1)(1/2)\!</math> |
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For every T seconds, the number of add/multiply operations is |
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Substitute |
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<math> |
<math>(2M+1)(1/2)\!</math> |
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in y(r) to get the result of the interpolating filter |
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Latest revision as of 18:37, 15 December 2010
Make a page about interpolating FIR filters. Take care to note how many multiply/add operations.
An interpolting filter is when you create "in-between" samples from the original sample resulting as if you had sampled the signal at a higher rate. Interpolation only works with integers.
The are under the rth impulse function of the interpolated signal is
For every T seconds, the number of add/multiply operations is
