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Re: [Discuss-gnuradio] Channel Impulse Response

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] Channel Impulse Response
Date: Fri, 16 Nov 2012 13:10:25 -0800

On Fri, Nov 16, 2012 at 12:30 PM, daviko <address@hidden> wrote:
I came to know about the 'gr-sounder' application which does just the thing
and was implemented in previous versions of gnuradio. I have version 3.6.0

how can I use this app for my purpose?
any help is appreciated

The gr-sounder app was a custom FPGA implementation based off the obsolete GNU Radio libusrp2 package for USRP2.  It would have to reimplemented from scratch using the current UHD package from Ettus Research.

The use of the FPGA was to enable the sounding waveform to cover a wider bandwidth than could be sent over the GbE transport for processing on the PC.  If your channel is narrow enough, you could implement the same algorithm in GNU Radio.  The transmitter was sending BPSK modulated PN sequences and the receiver was calculating correlation at successive time lags to estimate the channel impulse response.


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