Passive Radar Thesis (Quick Overview)
Вставка
- Опубліковано 17 лис 2024
- I made this video for my university's electrical engineering student society, to encourage others to make videos about their theses. I've had a lot of fun doing my thesis, and I think everyone else should too!
- Наука та технологія
Easily the best description of how passive radar can be used I've seen so far, thank you very much!
Amazing video! Great explanation. You must be an expert in your field
Good job Marcus.
Thats sick dude, great explanation
I love that shirt!!!
That was made by my university's electrical engineering club: uqebess.com/ :)
Hi myeongsa! I find really impressive the results you obtained. Congrats!!
At the moment I am doing a research task on passive radars as well and I would like to know if the published your thesis report or any other articles, and if we could have access to this documents. Thank you in advance!!
Hi Sergio, unfortunately, my thesis is not published anywhere. I don't typically share it out, but I am happy to answer questions about the content.
Hello, is there a way to take a look at your thesis document if it is public, also python script? I'm begginer and i will like to learn more about this amazing work, thanks!
Can you provide us more detail about the equipment used in the experimentation?
Hi, what further details would you like to know?
Here is a list of the main equipment that I used:
1. Log-Periodic Dipole Array from ANTSIG with the manufacturer stating a gain of
approximately 7 dBd (9.15 dBi) at 200MHz, where it was utilised.
2. Newsky TV28T RTL-SDR dongle based on RTL2832U chipset
3. RG6 Coaxial cable
4. Intel Core i7 6700 Quad Core LGA 1151 3.4GHz CPU Processor
5. Asus B150M-A mATX Motherboard
6. Asus GeForce GTX 950 DirectCU (Nvidia GPU)
7. Corsair 16GB DDR4 2133MHz RAM
@@myeongsa Hi, and the software is it GNU radio?
@@amineatt6713 No, I wrote all my own code in Python to do the processing.
@@amineatt6713 Hey, the software is not GNU radio, it's all stuff that I wrote myself.
@@myeongsa thx
What's the alternative if the transmitter is knocked out? Advanced planes emit few electronic signals as well. What's the solution for that? Please correct me if I'm wrong.
If you run out of transmitters, then you can no longer use passive radar
@@myeongsa I thought as much.
There is quite a bit more to passive radar than this, but this is a nice start.
A localization method called TDOA shares the same principle of how this passive radar detects objects. The result looks pretty good on the faraway object. What's the detection range this device could reach?
Honestly, I never got around to determining the detection range of this device. There are a number of parameters that could be optimised for range, but this was more about a proof of concept.
Passive Radar Thesis (Quick Overview)
Hi i need help with softwar
Hi, I would like to ask you about the code and the program/software you used. Is it written on python? Could it be written on C++? And for the signal what program did you use?
Hey, yes it was done in Python, and could definitely be done in C++. To record the signal, I just used the rtl-sdr free software
@@myeongsa thanks a lot. Could you give me your mail to ask you for more information about your project because I'd like to do it myself?
what filter do you use for direct signal suppression?
I mostly just used averaging via image processing of the range-doppler maps.
How things have developed since der Klein Heidelberg Parasit
hi i have a question, does passive radar cause electromagnetic radiation to increase around and over the target or is everything done invisibly even with a wave detection tool?
Hi, in passive radar, you are not emitting any radiation towards the target. The level of electromagnetic radiation around the target is the same whether you turn on your passive radar receiver or not.
@@myeongsa Hi, ok thank you, and an active radar is sending it waves in the direction of the targets then? is it possible to use the waves with an active radar in the manner of a passive radar with mobile antennas or other dedicated network sources for example?
@@HeavenDoor777 yep, that's exactly the application
@@myeongsa is it possible to use waves from mobile antennas or other sources, and use them as active radar? But not with 2 receivers as with passive radar, but with receivers on the transmitters?
@@HeavenDoor777 I don't 100% understand the question, but basically in my limited opinion, the only difference between active and passive radar is whether the transmitter is cooperative or non-cooperative (whether you control it or not). Anything else such as number and location of receivers or transmitters is just technical differences in the setup of your radar system
pardon me could i just ask if those receivers are found commercially or did you built them
They're all commercial ones. They were about $20 on eBay
Better receivers would improve the result greatly, I believe
I think the best passive system is the one use ambient noise and sun power as medium and silent as information signal that way pilot can not lock missile on ground radar signature because there is no signal from passive radar. On a Sunny day sun supply average 65 wat / ft SQ and at night the ambient noise of infrared and sun moon is more than .05w/ft SQ which can be amplified into strong enough signal by feed back circuit and detect easily and to use amplified Laser signal for Lidar passively is by using mirror of ambient negative to amplified positive emitter from air craft because kinetic energy would single out fast moving objects
@myeongsa Hey this is really interesting and congrats for the hons/masters thesis :) - I was wondering whether your gx card signal processing algorithm works better than the method of recording signals from RTL-SDR cards wired to share the same crystal?
I was interested in experimenting with passive radar from for meteor triangulation (so ranging small signals from >~100 km)?
Hi Matthew,
I'm not too familiar with the actual workings of those RTL-SDR cards, but my understanding is that it shares a common clock to all of them to help with synchronisation, and all the samples still need to be read from the individual dongle USB ports.
If this is correct, then I think that the algorithm that I'm using and the RTL-SDR card operate on different parts of the passive radar processing chain. They could be integrated, with a GPU being able to process synchronised signals rapidly, allowing for more meaningful results (and things like clutter suppression could be improved by having synchronised signals).
back to SEAD, DEAD is obsolete now (in some years)
Hi, I'm really interested in your project. Could I ask you a few questions via Email?
This is a very late response, but if you still have questions, ask away!