[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Fwd: Re: [Discuss-gnuradio] USRP data rates]

From: Jeff Brower
Subject: [Fwd: Re: [Discuss-gnuradio] USRP data rates]
Date: Thu, 09 Aug 2007 00:30:17 -0500


> 32 Mbyte/sec --> 16 Msample/sec --> 16 MHz bandwidth.

After reading Richard's reply and thinking about Nyquist, I must be wrong.  16
Msample/sec, 8 MHz bandwidth, somewhat less usable bandwidth.


-------- Original Message --------
Subject: Re: [Discuss-gnuradio] USRP data rates
Date: Wed, 08 Aug 2007 23:07:14 -0500
From: Jeff Brower <address@hidden>
Organization: Signalogic, Inc
To: Lisa Creer <address@hidden>
CC: address@hidden


> The USRP sales brochure lists as a feature "Capable of processing signals up 
> to 16
> MHz wide". I can only figure out how it can process signals up to 8 MHz wide. 
> What
> am I missing?
> Since samples sent across the USB are 16-bit signed integers (16-bit I and 
> 16-bit Q
> for complex samples) that makes each complex sample size 4 bytes. Since the 
> USB max
> is 32MB/s, we have a limit of 8MS/s which translates to an effective 
> bandwidth of
> 8MHz wide.

32 Mbyte/sec --> 16 Msample/sec --> 16 MHz bandwidth.

If you want to consider complex sampling, then divide into 8 MHz positive
frequencies, 8 MHz negative.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]