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Re: [Discuss-gnuradio] Frequency multiplexing at baseband -filters intro


From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] Frequency multiplexing at baseband -filters introduce 'DDDDDDDDDDD'
Date: Mon, 05 Dec 2016 18:58:53 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0

On 12/05/2016 06:42 PM, Marcus Müller wrote:

Dear Damindra,

a "D" means that your computer was so busy, the operating system wasn't able to handle network data sufficiently fast, and in effect, network packets were dropped even before they reached UHD.

This means that your filter is too compute-intense for your PC. Either get a faster PC, or decrease the order of your filter. Overly sharp filters are a common mistake.

Best regards,

Marcus


Also, for regularly-spaced channels, using a PFB channelizer or PFB synthesis block may be significantly more efficient for what Damindra is
  trying to do.



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