USRP data rates]

Lisa-

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.

-Jeff

-------- Original Message --------
Subject: Re: [Discuss-gnuradio] USRP data rates
Date: Wed, 08 Aug 2007 23:07:14 -0500
From: Jeff B. [email protected]
Organization: Signalogic, Inc
To: Lisa Creer [email protected]
CC: [email protected]

Lisa-

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.

-Jeff