Re: [Discuss-gnuradio] An FFT base xlating filter

[Alexandru Csete]

You're welcome. By the way, can you tell me approximately where Tom
talks about the FFT filter? I didn't have time to watch the whole show
but I am interested in that FFT filter too.

Alex

On Sun, Feb 3, 2013 at 11:18 PM, Jeff Scaparra <address@hidden> wrote:
> Thanks Alex,
>
> I will give that a try. Your website is what helped me get on the air
> initially in the 2 meter band. Thanks for posting.
>
> Scap KK4EPP
>
>
> On Sun, Feb 3, 2013 at 4:53 AM, Alexandru Csete <address@hidden> wrote:
>>
>> On Sun, Feb 3, 2013 at 7:16 AM, Jeff Scaparra <address@hidden> wrote:
>> > I just watched Tom Rondeau's presentation at TAPR online and learned
>> > about
>> > the benefits of an FFT filter over a FIR filter. I am wondering if there
>> > is
>> > a good way to replace my XLATING FIR Filters with FFT ones. I do need to
>> > be
>> > able to move the center frequency around?
>>
>> You can separate the translation from the filter and use complex
>> multiplication with a sine wave, where the frequency of the sine wave
>> corresponds to the translation offset.
>>
>> Alex
>
>