On 03/28/2016 07:10 AM, Daniel R.
Marlow wrote:
This is all complex sampling, so if your signal is 20Mhz wide, then sample it at a little more than 20MHz. With complex (I/Q) sampling,Hi Fikrat,
The sampling rate must be twice the BANDWIDTH that you want. I don't know much about
WiFi, but from the numbers you give, the range of frequencies you are interested in seems to
span about 2.447 - 2.427 GHz = 20 MHz. The receiver users an analog mixer to shift the frequency
band you want down to near zero frequency, so sample with 50 MHz should be adequate.
Sincerely,
Dan Marlow
a signal is sampled twice during each sampling period (at 90 degree intervals). This satisfies Nyquist.
From: address@hidden [address@hidden] on behalf of Fikrat Al-Kazimi [address@hidden]
Sent: Monday, March 28, 2016 7:03 AM
To: address@hidden
Subject: [Discuss-gnuradio] Max Sampling Rate Limitation
Dear all,
I am trying to monitor Wi-Fi channel number 6 which ranges from 2.427GHz to 2.447GHz.
As I read though, the sampling rate must be at least double the highest frequency, which in my case is equal to 4.894GHz. However, the USRP has a limit of 50MHz that I cannot exceed (I tried and it kept giving me actual sampling rate = 50MHz). Is there a way around it so that I can reconstruct the signal without much losses? What proper sampling rate can I choose?
Best regards,Fikrat
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