[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?
From: |
Henry Vredegoor |
Subject: |
RE: [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how? |
Date: |
Wed, 7 Mar 2007 03:30:25 +0100 |
Hi All, Nos,
If I remember your initial design goals correctly:
100 Msamples/second (for a receiver bandwidth of 0 - 50 MHz)
16 bits/sample
If my simple, rough, calculation is right this would give you a minimum
bitstream over Gigabit Ethernet of:
16 * 100 M = 1600 Mbit/s or 1.6 Gbit/s !! Excluding protocol overhead.
Well over 1 Gbit/s!
So you have to do something to reduce this I suppose! ;-]
- Reducing the number Bits/sample will cost you dynamic range
- Reducing sample rate will cost you receiver bandwidth) (no undersampling)
So you have to do DDC or some clever data compression in the remote
device.....
Henry.
> >
> > Listing out your requirements / wish list might be a good
> idea before
> > just saying you want to build this generic cheap SDR board.
>
> I think that, realistically, I will have to do something with the data
> already at the FPGA. Be it pre-processing or decimation I do not know
> yet, nor can I guesstimate due to lack of experience. PA3FWM in the
> link Henry posted managed to deal with 2.5Msps, but I don't know his
> bit rate. I've decided in the past that I would be happy with being
> able to see just 1MHz of bandwidth at the time, and PA3FWM seems to
> have exceeded that. The benefit of using a high-speed ADC in this case
> would not be voided, since we could still do a lot of mojo that one
> can't do with a radio that requires a tuner. The lack of tuner in
> itself makes the device cheaper too...
>
> And what's "RBW"? =)
>
> --
> Nos
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, (continued)
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, ceriel, 2007/03/05
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, Brian Padalino, 2007/03/05
- Re: [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, Kim Toms, 2007/03/05
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, ceriel, 2007/03/06
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, Brian Padalino, 2007/03/06
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, ceriel, 2007/03/06
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, Brian Padalino, 2007/03/06
- [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, ceriel, 2007/03/06
- Re: [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, Eric Blossom, 2007/03/06
- Re: [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?, Eric A. Cottrell, 2007/03/17
- RE: [Discuss-gnuradio] Re: A low-budget SDR - Was: PCIe know-how?,
Henry Vredegoor <=