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Re: [Discuss-gnuradio] AR5000 and downconversion
From: |
Henrique Miranda |
Subject: |
Re: [Discuss-gnuradio] AR5000 and downconversion |
Date: |
Wed, 14 May 2003 16:05:09 +0100 (WEST) |
Hello Alan,
>I've recently found that I have access to several standard radio
>receivers,
>including an AOR AR5000 and AR8600. Naturally, these both have a 10.7MHz
>output IF and thus aren't much use in combination with my 20MSPS A/D card
Take a look at a sampling technique called "undersampling" or "harmonic
sampling".
It is perfectly possible to sample a 10.7 MHz IF signal at a rate of
2 Msps, for instance, as long as:
* the analog bandwidth of your ADC is higher than the IF frequency
(easily met by your A/D card)
* the IF signal bandwidth is fully contained in a Nyquist region
In this example the maximum allowed bandwidth would be 600 kHz
(10.7MHz +- 300 kHz)
Nowadays many digital/software radio systems operate this way.
You can find a more detailed discussion on this subject in Frerking's
"Digital Signal Processing in Communication Systems" book.
Cheers,
Henrique
- Re: [Discuss-gnuradio] AR5000 and downconversion, (continued)
- Re: [Discuss-gnuradio] AR5000 and downconversion, Alan Gray, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, John R. Ackermann N8UR, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Dave Emery, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Krzysztof Kamieniecki, 2003/05/14
- Re: [Discuss-gnuradio] AR5000 and downconversion, Joseph DiVerdi, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Joshua Lackey, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Krzysztof Kamieniecki, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Joshua Lackey, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, Krzysztof Kamieniecki, 2003/05/15
- Re: [Discuss-gnuradio] AR5000 and downconversion, John Gilmore, 2003/05/15
Re: [Discuss-gnuradio] AR5000 and downconversion,
Henrique Miranda <=
Re: [Discuss-gnuradio] AR5000 and downconversion, Robert Kelley, 2003/05/14
RE: [Discuss-gnuradio] AR5000 and downconversion, Ettus, Matt, 2003/05/14
Re: [Discuss-gnuradio] AR5000 and downconversion, Joseph DiVerdi, 2003/05/19