On 07/11/2014 10:20 PM, Yingjie Chen wrote:
Hi guy,
Thanks in advance.
Currently I am implementing a project based on ofdm_bentchmark
example with USRP2. I remember that the sample rate of ADC of USRP 2
with RF2450 can be up to 100MS/s. That means we can use USRP2 to
capture at most 50Mhz bandwidth signal.
Initially, I plan to log the signal on my computer (/save as dat.
format)/ and analyze it offline. Everything is fine when the sample
rate(bandwidth) is set to 20MS/s in terminal. However, when we set the
sample rate up to 50MS/s, nothing can be log in my computer. I guess
there some software limitations in Gnuradio.
My question is how to remove such limitation to achieve the 50MS/s
sample rate. Any help will be greatly appreciated.
Best,
Kay
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
To achieve 50Msps, you'll need to use 8-bit wire format, and set the
peak= parameter appropriately. There's just not enough bits/second on a
1GiGe link to support 50Msps with 16-bit, full-width samples.
But you also need to consider the format you're writing samples to disk
in, and how much disk-write bandwidth you'll require to support that.
If you just use the same format (2 x 8bits) into the file, that's
100Mbyte/second into the disk. That may or may not be supportable on your
particular system.
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
