MADL vs other datalinks

Cockpit, radar, helmet-mounted display, and other avionics
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armedupdate

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Unread post24 Jul 2016, 05:35

How does MADL compare to other datalinks such as IFDL and Link-16? I know it's stealthier, faster and harder to jam, but by how much? Can systems like Link-16 and IFDL hop frequencies to be stealthy, and transfer tactical info instantaneously?
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spazsinbad

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Unread post24 Jul 2016, 06:16

RAN FAA A4G Skyhawk 1970s: https://www.faaaa.asn.au/spazsinbad-a4g/ AND https://www.youtube.com/channel/UCwqC_s6gcCVvG7NOge3qfAQ/
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garrya

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Unread post11 Mar 2019, 06:39

Where is this from?
53402030_992891110899623_6809620250661748736_o.jpg
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SpudmanWP

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Unread post11 Mar 2019, 07:17

Millimeter Wave Digital Arrays (MIDAS)
Dr. Timothy M. Hancock, MTO Program Manager
January 26, 2018
Page 5
https://www.darpa.mil/attachments/MIDAS ... Day_v3.pdf
"The early bird gets the worm but the second mouse gets the cheese."
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aussiebloke

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Unread post11 Mar 2019, 14:24

If you are interested in the range of MADL versus the range of Link 16 there is an interesting discussion here:

viewtopic.php?f=62&t=23563 [pages 2-4 particularly]
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element1loop

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Unread post11 Mar 2019, 15:48

Transmitters are usually thermally limited and manage their output limitations via dynamically varying gain as needed. and why use more gain than necessary over shorter distances? Which then allows higher gain burst output for longer distance if required, just not continuously. The larger ESM antenna and its gain sensitivity may be able to act as the receiver if the MADL panel's reception gain is a limitation with increasing distance. So I don't see why MADL couldn't do the same thing to dynamically extend burst transmission ranges, if/when necessary (without even resorting to APG-81).
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marauder2048

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Unread post11 Mar 2019, 18:36

This isn't strictly about range or gain; a single, narrow-beam MADL array needs more time to interrogate
a larger volume of space. A multi-beam array could dramatically reduce that time and permit
simultaneous transmit/receive to two or more network members that are within the
beam volume of a single array. The alternative is to time-multiplex or daisy chain
which impacts latency and throughput.

It's a revival of the omnidirectional MADL that NG/Harris proposed a few years ago.
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SpudmanWP

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Unread post11 Mar 2019, 20:46

MADL on the F-35 will typically only be communicating with 2 other F-35s at the same time. Those 2 being in the same arch and serviced by the same MADL antenna is not likely but would be easily doable.
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marauder2048

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Unread post11 Mar 2019, 21:23

SpudmanWP wrote:MADL on the F-35 will typically only be communicating with 2 other F-35s at the same time. Those 2 being in the same arch and serviced by the same MADL antenna is not likely but would be easily doable.


That's true for the typical chain topology but for a mesh topology, which it needs to be stressed is
independent of the MMW array technology as it can be a pure software implementation, it's more likely.

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