UFO's In Denver!

Quote from 377OHMS:

Boltzmann noise or kTB noise is random so there would be no way for a receiver to achieve coherence needed to subtract the noise out and recover the data. Both sides have to have a priori knowledge of the noise.

I think you mean Pseudo Random noise (PN) which is a repeating high speed symbol sequence known to the transmitter and receiver. Often "Gold Codes" that have an epoch or preamble are used that have a particularly good quality of randomness without being truly random. The transmitter modulo-2 asynchronously adds the low rate user data to the high rate PN sequence. The receiver looks for the "epoch" in the received stream and synchronizes to it then subtracts the PN code leaving the user data.

That is not really new and it is used all over the place in satellite communications, even by NASA (the NASA standard transponder uses PN sequences). But it is very cool. I'm a sort of half-assed expert on the TDRSS and made a small career out of going around to satellite programs and replacing the NASA compatibility test van with a microwave repeater that can handle the bandwidth needed by satellite links that contain PN encoded data streams since the bandwidth is about twice the PN data rate and it is a high data rate. Typical NASA bird requires about 10 MHz bandwidth minimum even for a low rate telemetry or command links because of those PN sequences.

Sorry for the jibberish. I could be wrong but I'm probably not. :)
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Very interesting...gibberish.
 
Quote from 377OHMS:

Boltzmann noise or kTB noise is random so there would be no way for a receiver to achieve coherence needed to subtract the noise out and recover the data. Both sides have to have a priori knowledge of the noise.

I think you mean Pseudo Random noise (PN) which is a repeating high speed symbol sequence known to the transmitter and receiver. Often "Gold Codes" that have an epoch or preamble are used that have a particularly good quality of randomness without being truly random. The transmitter modulo-2 asynchronously adds the low rate user data to the high rate PN sequence. The receiver looks for the "epoch" in the received stream and synchronizes to it then subtracts the PN code leaving the user data.

That is not really new and it is used all over the place in satellite communications, even by NASA (the NASA standard transponder uses PN sequences). But it is very cool. I'm a sort of half-assed expert on the TDRSS and made a small career out of going around to satellite programs and replacing the NASA compatibility test van with a microwave repeater that can handle the bandwidth needed by satellite links that contain PN encoded data streams since the bandwidth is about twice the PN data rate and it is a high data rate. Typical NASA bird requires about 10 MHz bandwidth minimum even for a low rate telemetry or command links because of those PN sequences.

Sorry for the gibberish. I could be wrong but I'm probably not. :)
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Why PN noise? encryption? efficiency? Aliens need the key or they can't watch Keeping up with the Kartrashians?


The technique I'm talking about is a phase sensitive technique and the modulation format is typically not on-off keying. kTB Noise has random phase, and for instance lockin amplifiers can pick signals out below the noise floor by integrating with a local oscillator. Integration tends to average noise out since noise phase will average 0 but signal phase will accumulate. That's boxcar so baseband might be low

A guy showed me his research for the CIA that uses a heterodyne technique, it's pretty impressive. Too bad for the bad guys, that's all I can say.
 
Quote from Mav88:

Why PN noise? encryption? efficiency? Aliens need the key or they can't watch Keeping up with the Kartrashians?


The technique I'm talking about is a phase sensitive technique and the modulation format is typically not on-off keying. kTB Noise has random phase, and for instance lockin amplifiers can pick signals out below the noise floor by integrating with a local oscillator. Integration tends to average noise out since noise phase will average 0 but signal phase will accumulate. That's boxcar so baseband might be low

A guy showed me his research for the CIA that uses a heterodyne technique, it's pretty impressive. Too bad for the bad guys, that's all I can say.
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I can't follow all of that but it sounds pretty cool.

On some of the NASA stuff I've worked on (nothing sensitive) when you look at the broadcast signal on a spectrum analyzer you just see this mound of noise, no carrier or side-bands or anything that looks like information.

Yeah, they use PN as encryption but it isn't robust enough for the really super secret squirrel stuff, just NASA and some commerical satellites.
 
Quote from 377OHMS:

I can't follow all of that but it sounds pretty cool.

On some of the NASA stuff I've worked on (nothing sensitive) when you look at the broadcast signal on a spectrum analyzer you just see this mound of noise, no carrier or side-bands or anything that looks like information.

Yeah, they use PN as encryption but it isn't robust enough for the really super secret squirrel stuff, just NASA and some commerical satellites.
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think of the mound of noise in a SETI reciever, does seem like a fools errand


I get a charge out of those Bigfoot and UFO shows with the 'pros'. I'm thinking I could rig up a very wide FOV telescope and collect all-sky imagery all night everynight hunting for UFOs. Start a cable show on my findings... there goes that spooky music again
 
Quote from Mav88:

think of the mound of noise in a SETI reciever, does seem like a fools errand


I get a charge out of those Bigfoot and UFO shows with the 'pros'. I'm thinking I could rig up a very wide FOV telescope and collect all-sky imagery all night everynight hunting for UFOs. Start a cable show on my findings... there goes that spooky music again
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YouTube has a few guys using night-vision technology lashed to telescopes and some of the footage is unexplainable.

For reasons I've stated I find it difficult to believe anybody would come so far to look at us but there are people suggesting that UFOs are inter-dimensional or even coming from the future. It all sounds a bit fringe but it is fun to think about.

The idea that the universe is empty except for us is equally fringe and sort of depressing too.
 
Quote from Max E. Pad:

Corret me if im wrong, but purely from a scientific point of view as to whether they could fly, does the whole flying saucer thing even make sense, or is it even possible?

Maybe Lucrum or 377OHMS could chime in.....
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If the Hitler regime could make a Volkswagen flying saucer, don't you guys think the Obama admins could too?

And how in the hell would Mr. You know they would be respectful? Unless he was one...
 
Quote from Hoofhearted:

If the Hitler regime could make a Volkswagen flying saucer, don't you guys think the Obama admins could too?

And how in the hell would Mr. You know they would be respectful? Unless he was one...
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Were you drunk when you wrote this?
 
Quote from 377OHMS:

YouTube has a few guys using night-vision technology lashed to telescopes and some of the footage is unexplainable.
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I looked at one of those, it looks like the ol' bug flying in front of the camera illusion. Notice the wings are the most blurry part in the stop motion picture of the object. Indicative of a flying insect or small bird/bat.
 
Quote from mrbill:
11-13-12 07:46 PM
...No wonder L-Kabong decided to bail out...
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Actually, like you, he never bailed. He's back already
I'll observe from the background for a while.

You guys on the progressive side, I'll continue to check PM's, and thanks for your support.
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What is it with you left wing drama queens and your goodbye posts/threads?
Do you not realize no one gives a shit if you stay or go?

And more importantly, why is it you're seemingly incapable of follow through and doing what you say you're going to do?
 
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