[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] UHD Warning on ODD Interpolation
From: |
embyte |
Subject: |
Re: [Discuss-gnuradio] UHD Warning on ODD Interpolation |
Date: |
Thu, 01 Aug 2013 14:56:14 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130701 Icedove/17.0.7 |
Hey Marcus, thanks for answering.
> (1) 720Khz is not an exact integer fraction of 64MHz (the sampling rate
> of the device)--so it rounded
>
> (2) It's warning you that you'll get a "humped" frequency response with
> more rolloff than you'd like, due to the rounded-down sample rate
> requiring an interpolation rate that is not divisible by two.
If I understood correctly, this it means that the transmitted signal
gets filtered more on the edges than expected?
Note that by setting a sampling rate of 720KHz, the transmission and
receiving work fine.
That is, can I fix the sampling rate warning and preserve the
transmitted signal by modifying the sampling rate (e.g. to 480KHz) and
by adding a band-pass filter before the USRP sink block?
Thanks for your insights. I appreciate.