A Software Defined Radio (SDR) Approach to Radar

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3 жыл бұрын

Please watch our update to this video which is called "A Software Defined Radio (SDR) Approach to Radar Part 1".
This video shows how to build a radar using software defined radio approach. The WiFi band radar uses an Analog Devices AD9361 transceiver chip and QIQ Systems' qIQ Radar software.

Пікірлер: 49

@stevesibert3947 Жыл бұрын

Nice Don! Glad to see you're still working with RF!

@steemglobal8011 Жыл бұрын

This is bad ass. Awesome project guys!

@edward6179 Жыл бұрын

Next step - replace ADRV9361 with a half-dozen MPF-102s

@karlmadsen3179 Жыл бұрын

Came for the home-made radar. Stayed for Girl from Ipanema theme music.

@myselfremade 2 жыл бұрын

Very nice! I was wondering if anyone had done an SDR radar before. ThatADRV9361-Z7035 is a bit expensive for the hobbyist though.

@qiqsystems 2 жыл бұрын

You might think about using an ADALM-Pluto (or just Pluto, for short). You can get one on Amazon for around $200. The latest version has a place for a second receive channel connector on the board, but not populated. It you populate that connector, then it would work just like the ADRV9361 System on Module system.

@steemglobal8011 Жыл бұрын

@@qiqsystems Awesome. Good to know..! Awesome channel and info you have going on here. Just getting into this sort of technology and your videos have been great for crash coursing me. Thank you very much. :)

@muhammadosama3358 Жыл бұрын

@@qiqsystems can we use cheaper SDR like the one's from Nooelec?

@pascalcoole2725 Жыл бұрын

Man y people have, i did this over 15 years ago using GNU-Radio libraries and a USRP.

@qiqsystems Жыл бұрын

The update to this video is called "A Software Defined Radio (ADR) Approach to Radar, Part 1". It uses an Analog Devices Pluto, version C. Plutos are much less expensive that an ADRV9361 eval board.

@j.lucena5486 Жыл бұрын

Very good sound. Tom Jobim

@malikunza9762 Жыл бұрын

great job brother! i want to know about modifications regarding ground surveillance radar. i am using adalm pluto.

@fryderyksokol Жыл бұрын

this is very interesting have to try on my system, than you for inspiration

@anonhollmuller4032 Жыл бұрын

thank ;)

@waelaziz8277 2 жыл бұрын

Great job! I am just wondering about the necessary modifications that I should make to use this project as GPR?

@qiqsystems 2 жыл бұрын

Ground Penetrating Radar would need to have different antennas, in order to work at a lower frequency. These antennas are for WiFi (2.4 GHz), which may not penetrate very far into the ground. However, I have not tried to use WiFi frequencies for GPR, so it might work better than I expect.

@mansordimer Жыл бұрын

Great video. Is the matching filter implemented on the FPGA or on the software??

@qiqsystems Жыл бұрын

The matching filter is a correlation done with the transmit waveform, implemented in software.

@WahlVids Жыл бұрын

Could you hypothetically use it to receive but with an omnidirectional receiver to filter and attenuate incoming signals?

@qiqsystems Жыл бұрын

An omni antenna does not provide gain, so the incoming signal would be closer to the noise floor. Also, it is not possible to say where the signal is coming from, since it is omni-directional. Other than saying that something is nearby, omni antennas would have limited value.

@mrdovie47 Жыл бұрын

I made a crude dish reflector for a doppler microwave lamp circuit and was able to boost the range to where it saw me moving. I think it samples the return signal and hears an audio beat when the target moves near or farther away. Very cheap radar.

@ReevansElectro Жыл бұрын

I had no idea that you had encoded music in your signal 6:30 7:50 I love the music though!

@qiqsystems Жыл бұрын

Had to drop the music over a copyright claim. Just wanted some elevator music to enjoy while the demo proceeded. Oh well...

@qrpbear Жыл бұрын

Back in the late 80's/early 90's I used to service the X-band traffic radar guns used by the Honolulu Police Department. They were essentially the same SDR approach as described in this video. The Gunn diode transmitter simultaneously acted as the local oscillator for the receiver and supporting circuitry simply processed the audio difference frequency translating it to the equivalent speed of the moving target. With a 'tapoff' to provide an external audio output, the radar gun could also be used to detect the sounds of voices when aimed at buildings with reflective window covering.

@marinenav8 Жыл бұрын

There are Blog ?

@kurtbilinski1723 19 күн бұрын

Coincidentally, the owner of the house in the background is asking his wife, "does it seem warm in the house?"

@__CS Жыл бұрын

Sounds like they’re talking about a Retro Encabator

@eminrahimov4411 5 ай бұрын

Can this system detect movement or presence of human through brick wall?

@qiqsystems 5 ай бұрын

I doubt it.

@AngelicaLady Күн бұрын

Ever heard of us privacy laws

@_Chad_ThunderCock Жыл бұрын

Now make a AESA radar hehe

@skeets6060 Жыл бұрын

I admit I know nothing about SDR, so what is this for ?

@qiqsystems Жыл бұрын

Mostly for fun. But also to illustrate how radar works.

@xy4489 Жыл бұрын

It's an ad for the company.

@georgen9755 Жыл бұрын

apogee altitude 294,448 ft , wind speed of 160 knots,

@xy4489 Жыл бұрын

Why not maximize the window?

@qiqsystems Жыл бұрын

If you prefer, maximize the window. I sometimes want access to other icons on my desktop, so I leave some of the desktop uncovered. If that isn't an issue for you, then maximizing is a good choice.

@royshashibrock3990 Жыл бұрын

I'm an old timer, but I can't understand the modern fascination with "software defined" (enter application here). Any digital system is by definition software defined, even if the "program" is hard wired by an arrangement of discrete chips, because someone had to "write" the algorithm or code (software) that makes it perform its intended purpose. Radar is nothing more than sending a short RF signal burst and measuring the return time, length of return time differences (if the radar antenna is not fixed), and phase of that signal when reflected from a distant object. Doing this can allow you to deduce approximate size, distance, and if done repeatedly, speed of an object. Modulation of the wave burst is not strictly necessary. Truly accurate radar had to wait for digital time keeping techniques, and it was implemented as soon as it was available. RF carrier signals transmitted over the air MUST BE sine waves; if not, you interfere with other users of the radio spectrum. If you want to digitally generate the base frequency, we are talking frequency synthesis (this includes RF mixing for heterodyning). Want to modulate the signal using digital techniques? Go ahead...but don't claim it is a new process. All forms of modulation are almost as old as radio itself - AM, FM, PM, packet, TDM, FSK (two tone or more), and many others. Most are done digitally at this point. Digital frequency selection has been standard on radios for many years. With "software defined" radio, you are not "defining" anything. You are merely replacing what analogue sections you can with digital processes, and making it where the end user can change key parameters of the controlling algorithm...things that have been done already. This seems much like how manufacturers advertise "digital" antennae for TV reception - a new name to stimulate interest and buying frenzies, but in reality the same thing you already have. Someone here tell me where I am wrong...what am I not seeing?

@xy4489 Жыл бұрын

Can you listen to a set of satellites broadcasting signals modulated using PRN sequences / Gold codes using a non-SDR radio? You can with a dongle that feeds raw IQ data to SW, GNU radio, and some C++ code for a correlator. Special-purpose hardware would be orders of magnitude more efficient, but that is practical only when the application is finalized, until then, the value from SDR is enormous.

@royshashibrock3990 Жыл бұрын

@@xy4489 The answer is yes. We are still talking about modulation, and sending coded (or scrambled, or digitally interleaved) data over multiple RF carriers was around in the '70s. Multichannel receivers to aggregate information from several different sources have also been around at least as long. Data acquired via the internet has nothing to do with radio per se (although listening to music stations over an internet supplied digital stream is now sometimes called "radio.") My point is that the meaning of the word radio has always been the process of transmitting information using a radio frequency carrier signal; with the system you described, the "radio" part is still the same, even with the complex modulation scheme. As I said above, it seems to me that it is just a change in jargon to reignite the interest of the masses. Perhaps it would be better to call such a system "software defined multiple source carrier modulation."