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From: | Tom Rondeau |
Subject: | Re: [Discuss-gnuradio] iir_filter does not work with specified feedback taps? |
Date: | Wed, 22 Oct 2014 09:05:50 -0400 |
Hi All,Any guys who ever used IIR filters? I got problems as below:I want the IIR filter works as:y[n] = 1.8*x[n] + 0.8*y[n-1]Then I set the feed forward taps as [1.8], feeback taps as [0.8], just likeself.iir_filter_xxx_0 = filter.iir_filter_ffd(([1.8]), ([0.8]), True)But my testing result show that the feedback taps are not involved in computing at all, thus my output turns toy[n] = 1.8*x[n]I don't know anything wrong happened to my usage...Need help. Thanks--
Alex,
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