Is it possible to create and deploy wi-fi networks of this kind on "their own" frequencies?

Question

Electronics

For the sake of amateur interest, I would like to know if it is possible to make existing wi-fi equipment work at other frequencies using existing communication protocols, or to create something similar on your own, thereby protecting your devices from hacking, interception of control and other unpleasant things? Of course, I would also like to know if it is possible to make receiving devices work at other frequencies, for example, drone control, again for protection, preferably at lower frequencies for a greater range.
And are there alternatives to GPS\GLONASS for self-deployment on a scale of several kilometers (I hope that doesn't sound too silly)?
Thanks in advance!

Answer 1

is it possible to make existing wi-fi equipment work at other frequencies

Yes, but it's complicated and illegal.
Useless. It's better to write your own protocol. But this case again breaks down quite simply.
Any transmitter can be inverted into a receiver and vice versa.
You might as well put 50 inch wheels on your car to go faster.
Exist. This is called geolocation. The triangulation method is usually used. Usually works on the basis of radio towers of mobile operators. However, you should remember that GPS\GLONASS is absolutely free and works all over the world, except for the poles and caves.
PS
Some people have been developing radio for many decades, and you decided to take it and do it your own way. You are great, I love it too. But radio is a shared limited resource. And you want to park in the middle of the freeway.

Answer 2

wi-life.ru/texnologii/wi-fi/wi-fi-regulyatorika
https://ru.wikipedia.org/wiki/Location-based_service
well, you just can’t change the frequency in hardware

Answer 3

Since WiFi equipment has not been made on discrete elements for a long time, it is impossible to rebuild it to a different frequency range, since everything is implemented "in silicon", and not on "coils and capacitors" that can be soldered. Therefore, on existing equipment - no way.
Ready-made alternatives to navigation aids suitable for independent domestic use do not exist.
Anything you want requires a fair amount of knowledge in electronics and radio engineering.

Answer 4

There are very few radio wave bands that can be used without registration in the state office and there are certain conditions for their use.
the wafer cannot be used outside the permissible wave ranges. even if they are :) for example, channel 14 of the 2.54 GHz section is prohibited in the Russian Federation, but in Japan it is allowed. those. expose Japan and use Wi-Fi channel 14, which is slightly cleaner from neighbors, although not all Wi-Fi devices will be able to see such a network. such a life hack
if you don’t run into a waffle. then take for example the radio network of the nanoloc system, its speed is 2 Mbps because it is focused on industrial use, but there is a built-in ability to measure the distance between network devices with an accuracy of half a meter.
enough for local games.
for zhps you canmake up your own system of differential corrections and reduce the positioning error below a meter.
or supplement zhps with inertial positioning or much more.

Answer 5

is it possible to make existing wi-fi equipment work at other frequencies

For the most part, no. Now they are made so compactly that all the logic that was previously done on LC circuits is now sewn inside the chip, where there are both L and C as much as necessary. You take a USB wifi antenna, for example, for a DVB-T2 receiver - it is slightly larger than a USB connector - what will you do there?
Cheapness is mass. Mass character is a well-established technical process. Even if you have a complete circuit diagram in your hands (which you still need to find, but it's not easy) - you can't do anything, because it's all inside the chip :)
Are you so good at developing communication and information security protocols that you have no doubt that you will do better than the existing ones?
Between frequency and range there is no correlation from the word at all. You can force it by redoing the radio module. The question is - who will allow you to use these frequencies? It was a hundred years ago who first got up - that and slippers, now the frequency bands, which are the essence of a common and indivisible resource, have long been distributed. Want to get on the frequency of the cops? Or on the army frequency?

Answer 6

I think that you can convert wi-fi to a different frequency. But with a lot of reservations.
A simple soldering of a coil or quartz is indispensable here, and not every module is suitable. It is necessary to find most likely an old module in which it will be possible to find a specific track on the board along which the modulating signal will go. And with this signal, modulate another transmitter at a different frequency.
Naturally, we will lose all control, such as channel selection, power control, and so on. But in theory, you can make this chimera work)