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Re: [Discuss-gnuradio] Bluetooth using RFX-2400


From: Dan Halperin
Subject: Re: [Discuss-gnuradio] Bluetooth using RFX-2400
Date: Wed, 16 May 2007 12:23:02 -0700
User-agent: Thunderbird 1.5.0.10 (X11/20070403)

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Johnathan Corgan wrote:
> Dominic Spill wrote:
> 
>> I think I may've mis-phrased the question, if I have a single daughterboard 
>> and I tune to 2.44GHz, what are the highest and lowest frequencies that I 
>> should be able to see when I run something like the usrp_fft waterfall 
>> program?
> 
> With a decimation of 8, you will see 64 Msps/decimation = 8 Msps complex
> over USB = 8 MHz passband = 2436 MHz - 2444 MHz.
> 

Has anyone actually implemented using smaller I/Q coefficients and doing
e.g. 16 MHz with 8-bit coeffs or 32 MHz with 4 bits? I'm curious as to
how performance degrades with lower resolution.

32 MHz should be the maximum passband since the A/Ds are at 64 MHz, yes?

- -Dan
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