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Re: [Discuss-gnuradio] Radar mono

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] Radar mono
Date: Mon, 25 Aug 2008 10:34:21 -0700

On Mon, Aug 25, 2008 at 4:35 AM, Naoufel Amri <address@hidden> wrote:

> ./usrp_radar_mono.py -T A -R B -f 2.41e09 --ton=300e-09
> --tlook=12e-06 --prf=10000 -v -F /home/naoufel/data.bin -w 16e6

The value on Ton is rather low for your chirp width.  You are trying
to sweep 16 MHz over 20 USRP clock cycles.

Also, your look time is too long for your PRF.   A 12us look time
results in 768 samples in the echo return vector, or 3072 bytes.  At a
PRF of 10000, this results in 30.72 Mb/s of data, which likely exceeds
your disk recording capacity.  You're probably getting overruns which
result in gaps in your data.

Johnathan Corgan
Corgan Enterprises LLC

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