Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [radio]

For question involving radio waves or communication by radio

9
votes
5answers
922 views

What would make radio transmission unfeasible on a planet?

I am looking for a good reason to make radio communications on a planetary scale unfeasible or impossible. Short-range use is acceptable, but no transmissions should make it to orbit or over the ...
6
votes
1answer
97 views

Digital communication in pre-transistor era

Recently I have read about radioteletype devices capable of sending text messages via radio waves already in the first half of 20th century. Unfortunately, these teletypes used Baudot code, which is ...
2
votes
2answers
98 views

Asteroid material that can cause signal distortion

I'm making a hard-ish sci-fi universe where humans colonized nearby star systems and found not one but two civilizations in Alpha Centauri, each at home on a planet orbiting one of the two main stars. ...
2
votes
2answers
113 views

Could a Superhero with radio wave powers hear the radio?

Is it was technically possible for a superhero that senses radio waves (like low frequency EM) to “hear” the radio? This superhero senses radio waves a bit like we can see visible light, though not ...
5
votes
1answer
145 views

Radio Signal traveling 50 light years

Let me pose this question as a hypothetical. Your ship warps/jumps to a planet 50 light years away. You set up a radio signal receiver. Theoretically, the radio is going to receive radio-waves from ...
10
votes
4answers
451 views

Anatomically correct radio communication

Could animal produce less than 700MHz radio waves to communicate ? I don't want those waves interfere with mobile phones and other intercontinental radio communication my space colonists would use. Is ...
2
votes
3answers
55 views

Resonant Frequncy Interference Pattern

Imagine an area in which there are multiple high-power sound wave emitters (speakers, transducers, etc.) that are placed and tuned to destructively and constructively interfere with each other such ...
11
votes
16answers
3k views

Radio technology: Receiving without the ability to transmit

Scenario: In my alternate-Earth scenario, Europeans did not colonize the Americas. They use navigation only to circumnavigate Africa and go to India. Maybe they know there is something to the West, ...
3
votes
5answers
116 views

Why would human operators have to be close to the drones?

So, in this world, the future's wars are fought by drones and recruit teenagers with attitude, who control and repair drones in a temporary base near the front, and are frequently targets of surprise ...
21
votes
13answers
5k views

Why would radio signals be invented/transmitted when communication is not an issue?

Imagine a world where you can talk to anyone at all at any time, and telepathically transmit any amount of information to any select group of people. Why would a world like this ever get to the ...
7
votes
9answers
337 views

How to Keep a Local Radio Station Broadcasting in an Apocalypse

I need to keep a radio station running after an Apocalypse. There is no power grid of course. Details of apocalypse are not entirely set in stone. The only rules to this question are those ...
9
votes
4answers
155 views

How would a Plant Phylum Bio-Ship communicate with its home planet?

One of the worlds I'm creating has a planet-wide communal sentient Biosphere (similar to Avatar). They have evolved the ability to bio-engineer whatever they need, and they have decided to send a ...
3
votes
1answer
100 views

Could a gravitational lens in the far future be used to detect 20th century radio or television broadcasts?

Wondering if a naturally occurring gravitational lens (such as one created by a star or black hole) could be used in the future by someone searching for "ancient" (ie, our recent) radio and TV ...
6
votes
3answers
247 views

Would an advanced alien civilization use radio waves to communicate? [closed]

When SETI tries to look for aliens, they always try to catch the echos of radio waves sent out from alien civilizations. But would an advanced civilization even bother to use radio waves? Are there ...
17
votes
6answers
2k views

Could a large radio telescope survive interstellar spaceflight?

I recently came across Could pulsars really act as "lighthouses" to help in interstellar travel?, asked a week ago. The author was trying to figure out if pulsars could be useful for ...
2
votes
1answer
140 views

What is the minimum level of technology required for deciphering an extraterrestrial radio signal? [closed]

A civilization detects another in a nearby star system. They send an electromagnetic signal to establish contact. In this setting, I'm working from these assumptions: The emitter civilization has our ...
-6
votes
5answers
155 views

If radio communication somehow requires atmosphere to work, how would space exploration be different? [closed]

The first thing that I can think of is that space exploration becomes incredibly slow, because sending everything up there that is not pre-programmed needs a human pilot, and there would be no way of ...
0
votes
2answers
170 views

How would an extrasolar spaceship communicate with Earth?

Given modern technology, what kind of bandwidth could you expect for communication with an extrasolar spaceship? For example, is HD video possible? Is it safe to assume it would vary by distance? Or ...
7
votes
4answers
312 views

Sci-fi scenario: could all radio communication be blocked?

In order to make my book more palatable, I want to know if there is a scenario where all surface radio communication could be permanently blocked, either by technological or natural phenomena, so that ...
3
votes
3answers
170 views

Using EM noise + computers to simulate sound in the cockpit

I had a fun idea for a space simulator game I'm working on from a lore standpoint. We all know that there is no sound in space due to it being a vacuum. The lack of sound would probably leave pilots (...
25
votes
17answers
7k views

Need a way for Earth not to detect an extrasolar civilization that has radio

The exposition is that a civilization exists about 200 light years from earth and has been capable of radio communication for several thousands of years. They are not trying to hide from detection but ...
5
votes
4answers
930 views

How many nodes are needed in a communication satellite network so that it may be a weapon?

It is well known that phased arrays of antennas employ the wave properties of electromagnetic radiation (radio, microwave, light) to put a bunch of energy on a certain point. (Fancy wifi routers do ...
4
votes
2answers
178 views

Is it possible to receive an echo from a radio signal in space?

I'm looking for creative people with knowledge of radio waves and space flight to help me out. I'm currently writing a screenplay about a spacecraft that is basically a radio antenna in space. The ...
4
votes
1answer
801 views

What good is a radio after a nuclear apocalypse?

Suppose in a post-nuclear apocalypse world, there are still less than a million survivors throughout the world. Radiation levels in the air are lethal for many animals, sea water is contaminated and ...
25
votes
19answers
10k views

Can I send S.O.S in space with just a conventional cellphone?

The year is 2109 C.E my friends and I were caught in a space disaster when the spacecraft we're in broke apart during a daring escape from a patrolling spacecraft. We stole an antique cellphone (from ...
6
votes
5answers
611 views

Given present-day Earth as we know it, how could I fake a radio transmission as coming from a distant star?

Setting: Western world nation, Earth as we know it, May 2016, Gregorian calendar. Eccentric billionaire, large multinational corporation or similar; lots of money, and ability to enlist the help of ...
53
votes
6answers
10k views

How far away would an alien civilization need to be for us to not notice them?

Far away, across the vastness of space, lies an alien civilization, who are pretty similar to us. They've got ice cream, peer to peer networking, and photography. More importantly, they do lots of ...
6
votes
6answers
2k views

Would it be possible to build helicopters without knowledge of radio transmission technology?

I'm putting together a little self-actuating industrial society in a post-nuclear desert. I want the chief mode of transportation for their military to be helicopters, similar to those used in the ...
22
votes
3answers
846 views

How to evolve biological radios?

Radio Thinkers Creatures that communicate by biological radio pops up in science fiction occasionally and it's a fun idea. However, there are some practical concerns with regards to evolving a radio ...
23
votes
6answers
4k views

What would Earth have to do to “go dark”?

The US Government, and eventually the UN and all nation-states around the world, have realized they are broadcasting their existence to potential enemy civilizations in the nearby galaxy (at least to ...
5
votes
3answers
329 views

How could a radio system (or an alternate) work in an isolated underground society?

A cave-bound society with radios. Consider that: This is a three level network of caverns. The radio is internal and doesn't need to connect to the outside. The level of technology is sort of what ...
4
votes
7answers
1k views

Intercepting and Faking Radio Communication

In my story I have a two-sided battle. I want one of the sides to mess with the other by hacking their radio communication. How viable is it that one side could intercept and importantly block or ...