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Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC
From: |
Henrique Miranda |
Subject: |
Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC |
Date: |
Fri, 30 May 2003 03:07:48 +0100 (WEST) |
> Is there a analytic relationship which provides a minimum sample
> frequency, orders, and interval limits? such as:
>
> F(fcenter, fbandwidth/2) = { fsample, n-1, n }
Joseph,
After some calculations I came with the following procedure:
1: The Nyquist region can be obtained using n = floor(fc/B + 1/2)
where floor(x) rounds x towards minus infinity, fc is the
IF center frequency and B the signal bandwidth.
2: The minimum fs can then be easily obtained by fs = (2*fc+B)/n
3: If the optimum fs is intended use fs = 4*fc/(2*n-1) instead.
Moreover, if (fc/B + 1/2) is an integer, then minimum fs equals
the optimum fs.
If you find some inconsistency in this procedure please let me know.
Henrique
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC, (continued)
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC, Henrique Miranda, 2003/05/28
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC, Joseph DiVerdi, 2003/05/28
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC, Henrique Miranda, 2003/05/29
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC, Joseph DiVerdi, 2003/05/29
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC,
Henrique Miranda <=
- Re: [Discuss-gnuradio] USB2 <-> fast ADC & DAC, Joseph DiVerdi, 2003/05/30
- [Discuss-gnuradio] Brooktree / Conexant video capture, Robert Kelley, 2003/05/31