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Re: [Discuss-gnuradio] FPGA in USRP

From: Achilleas Anastasopoulos
Subject: Re: [Discuss-gnuradio] FPGA in USRP
Date: Fri, 15 Jun 2007 08:34:36 -0400
User-agent: Mozilla Thunderbird 1.0.2 (Windows/20050317)

Dear Mande

here is an application that requires significant FPGA

try to design the first stages of a spread-spectrum receiver,
ie, the part of the receiver that does pn code acquisition
(and tracking). This is a demanding task that needs to be performed on hardware. Once code acquisition/tracking is performed, the input data
can be despread (this is also done in hardware) and then only the
symbol-spaced samples are passed to the Gnu-radio software for
further processing (ie, decoding, etc).
Some receivers require 2 or 3 such blocks (fingers) running in parallel.
Check out how IS-95 mobile standard works for more info.


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