# USRP FPGA resource utilization

**URL:** <https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955>\
**Category:** GNU Radio\
**Created:** [November 22, 2007, 3:59am UTC](https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955 "2007-11-22T03:59:45Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![C\_S\_Nagaraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ba9def/32.png) [@C\_S\_Nagaraj](https://www.ruby-forum.com/u/C_S_Nagaraj)\
**Post date:** [November 22, 2007, 3:59am UTC](https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955/1 "2007-11-22T03:59:45Z")

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Dear All,

I’m planning to use the DBSRX with USRP board. After the frequency  
translation and filtering I want to process the samples further inside  
the  
FPGA, before transferring it to the host.

Could you please let me know the resource utilization of EP1C12 in the  
USRP  
board, assuming that I need samples at (i) 64MHz (ii) 32MHz, (two  
cases). It  
would help me know beforehand whether I’ll be doing my part of the  
processing in FPGA or software.

Thanks in advance,  
Nagaraj

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**Author:** ![C\_S\_Nagaraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ba9def/32.png) [@C\_S\_Nagaraj](https://www.ruby-forum.com/u/C_S_Nagaraj)\
**Post date:** [November 22, 2007, 4:07am UTC](https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955/2 "2007-11-22T04:07:55Z")

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On Nov 21, 2007 9:36 PM, C S Nagaraj [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> Dear All,
> 
> I’m planning to use the DBSRX with USRP board. After the frequency  
> translation and filtering I want to process the samples further inside the  
> FPGA, before transferring it to the host.

If you don’t mind me asking, could you be a little more specific as to  
what you want to accomplish?

> Could you please let me know the resource utilization of EP1C12 in the USRP  
> board, assuming that I need samples at (i) 64MHz (ii) 32MHz, (two cases). It  
> would help me know beforehand whether I’ll be doing my part of the  
> processing in FPGA or software.

Depending on the load and what your needs are (2xRX, 2xTX, 4xRX, etc)  
and how flexible you need to be (one bandwidth, selectable bandwidth,  
etc) the utilization varies.

With regards to your sample rate, is that the bandwidth you’re trying  
to process, or are you looking at less bandwidth? What kind of  
processing are you looking to do within the FPGA? Again, a little  
more information here might be more helpful.

Brian

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**Author:** ![C\_S\_Nagaraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ba9def/32.png) [@C\_S\_Nagaraj](https://www.ruby-forum.com/u/C_S_Nagaraj)\
**Post date:** [November 22, 2007, 4:24am UTC](https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955/3 "2007-11-22T04:24:52Z")

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Hi Brian,

Thanks for the reply.

Well, I have to decide the actual processing what goes inside the FPGA  
based  
on the resource that will be left-over.

To start with, I’ll be using only 1RX to obtain the signal at a fixed  
bandwidth of 60MHz (+/- 30MHz at base band, I/Q sampling) sampled at  
64MHz.  
So for this case, if I know the resource utilization it is enough as all  
the  
other cases are subsets of this case in my design.

Regards,  
Nagaraj

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<div class="post-metadata">

**Author:** ![C\_S\_Nagaraj](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/ba9def/32.png) [@C\_S\_Nagaraj](https://www.ruby-forum.com/u/C_S_Nagaraj)\
**Post date:** [November 22, 2007, 4:44am UTC](https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955/4 "2007-11-22T04:44:10Z")

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On Nov 21, 2007 10:24 PM, C S Nagaraj [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote:

> other cases are subsets of this case in my design.  
> To process that much bandwidth, you can’t really use the CIC or the  
> halfband FIR filter so you’re really just looking at some FIFOs to  
> talk to the FX2 microcontroller - the rest of the FPGA is all yours.

With all that bandwidth, I can only imagine you’re looking to do some  
sort of multitone/OFDM style waveform.

Brian

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**Author:** ![Akshada11](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/a8b319/32.png) [@Akshada11](https://www.ruby-forum.com/u/Akshada11)\
**Post date:** [May 13, 2020, 6:04am UTC](https://www.ruby-forum.com/t/usrp-fpga-resource-utilization/120955/5 "2020-05-13T06:04:54Z")

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hello,  
i am working with FPGA, USRPB and GNU radio. Can you tell me how to calculate resource utilization in FPGA?