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Re: [Discuss-gnuradio] [GSoC] gr-radar: Dual CW Radar and Tracking Algor

From: Martin Braun
Subject: Re: [Discuss-gnuradio] [GSoC] gr-radar: Dual CW Radar and Tracking Algorithms
Date: Wed, 16 Jul 2014 15:08:19 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

On 07/16/2014 12:00 PM, Stefan Wunsch wrote:
> I'm not sure in which way you mean 'related to'.
> The range is not measured with the EIRP. The difference of the
> dopplerpeak phases of the two CW signals is proportional to the target
> range. This way you get the target range!

I guess the OP asked about the maximum range of the radar system, which
is related to EIRP.

> A higher EIRP makes the detection easier because you have higher
> backscattered power but it do not change your estimated target range.
> Furthermore your maximum detection range is also not really dependent on
> EIRP. The maximum range is given by the difference of the dopplerpeak
> phases equal to 2*pi because a target with a greater range than the
> maximum range doesnt differ from a target of the range R modulus R_max.

...and there's that. In any radar with a repetitive pattern, there's an
'unambiguous range'. It helps if that is larger than the actual
achievable detection range.


> Greetings!
> Am 16.07.2014 08:08, schrieb Vanush Vaswani:
>> Nice. I don't know much about radar. Is range related to EIRP?
>> On Wed, Jul 16, 2014 at 1:14 AM, Stefan Wunsch
>> <address@hidden> wrote:
>>> Hi,
>>> The Radar Toolbox has new features!
>>> First new feature of the Radar Toolbox is a Dual CW Radar. It is
>>> implemented as simulation and tested with USRPs. This setup is much more
>>> better than the previous FSK Radar!
>>> Check out my development blog for a demonstration video and further
>>> information. [0]
>>> Second feature is a cooperation with a bachelor student at the CEL [2].
>>> His thesis is about tracking algorithms for radar signal processing.
>>> Realtime tracking with a SIR particle filter and an unscented kalman
>>> filter is implemented and tested on hardware.
>>> There is also a video on my blog with the comparison of the tracking and
>>> the not past processed detections. [1]
>>> Furthermore OFDM Radar signal processing with a new GUI block is coming
>>> these days!
>>> Greetings,
>>> Stefan
>>> [0] Dual CW Radar
>>> https://grradar.wordpress.com/2014/07/15/dual-cw-radar-demonstration/
>>> [1] Tracking Algorithms
>>> https://grradar.wordpress.com/2014/07/04/realtime-tracking-with-particle-filter-algorithm/
>>> [2] Communications Engineering Lab
>>> http://www.cel.kit.edu/english/index.php
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> address@hidden
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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