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From: | Ron Economos |
Subject: | Re: [Discuss-gnuradio] Fwd: Frequency vs time domain Filtering Anomaly |
Date: | Fri, 5 May 2017 16:09:53 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 |
I use the FFT filter for root raised cosine filtering in the
gr-dtv component. Here's the benchmark results for a FIR filter
and FFT filter at 8 Msps and 100 taps. The CPU cycle savings is
pretty dramatic. The output from both filters is sample for sample
identical (well, floating point identical, which I consider to be
no more than about +/- 0.000001) FIR filter at 93.0% CPU. FFT filter at 18.6% CPU. Ron On 05/05/2017 02:13 PM, Marcus Müller wrote:
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