Brian Padalino wrote:
On 4/21/07, Eng. Firas <[EMAIL PROTECTED]> wrote:
Hi All,
I'm a new USRP user. Kindly, I will be very appreciated if someone
could
tell me what is the decimation range of the USRP RX path? I'm really
confused. Is it linear range from [1,2,3,4,.....] ?or it is power of 2
[2,4,8,16,...]?
It's linear and within 4 to 128 inclusive, according to
cic_dec_shifter.v located here:
http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib/cic_dec_shifter.v
The CIC decimator does 4 through 128, but this is followed by a halfband
decimator which multiplies this by a factor of 2. Thus, it only does
multiples of 2. 4, 6, 8, 10, 12, 14, 16, 18. 20, etc. Up to 256 total.
Matt
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