rrTV-PHOTO   New HD TV
HOME   rrTV-PHOTO   GALLERIES   MY GALLERY   HELP-FAQ
myHOME PM pmRR MEMBERS 382 ONLINE 25 EVENTS SEARCH REGISTER  START HERE
 
8 pages [ <<    <    ( 1 )     2      3     NEXT    >> ]16893 viewsPOST REPLY
Ace Hobby . Esprit Model . Thunder Power RC

.
.
Main Discussion > HERE COMES THE FUTURE IN RC RADIOS
 
 
staraero1
Key Veteran
Location: Atlantic City, New Jersey

Take a look at what Model Avionics has comming now! Look at the lower right hand corner of their web page. A Spread Spectrum Radio System.

http://www.modelavionics.com/

This will change everything. And it is about time. Hold on and don't buy any of those expensive radio systems just yet. This is going to be the ticket.

Staraero1
03-29-2004 Over year old.
 
 
sincity
Veteran
Location: Pasco, WA

Haha... that's funny stuff.
I work in the wireless world and I'll tell you the 2.4 range around here is saturated as hell. There is no way in heck I would even attempt to use something like that.

2.4 is unlicensed and in my opinion, not suited to our needs. Anyone can fire up a wi-fi radio network and blow you out of the sky. Especially since it is DSSS.

Interesting thought though.

Shawn
03-29-2004 Over year old.
 
 
z11355
rrMaster
Location: 10000 is enough time wasted.

Its CDMA, it won't happen like that.

if he implements it right, it'll be great.
03-29-2004 Over year old.
HOMEPAGE  
 
 
capebob
Veteran
Location: Cape Coral, FL

Interesting. Even if it works as advertised I think you will still need one of the "expensive radio systems". My guess is that it is designed to plug into your transmitter's DSC.

Bob

Success is the ability to go from one failure to another with no loss of enthusiasm. Churchill
03-29-2004 Over year old.
HOMEPAGE  
 
 
staraero1
Key Veteran
Location: Atlantic City, New Jersey

I'll bet it probably must plug into a system. I never thought of that one. Would the new high end stuff work with this system? Hey these guys made an excelent governor system. There is no reason to think this should not work. I would try one.

Many people said other things would not work that did before. You don't know until you see it go. This will actually be needed if that power company internet issue comes to pass.

Staraero 1
03-29-2004 Over year old.
 
 
vetrider
Elite Veteran
Location: Daleville, AL (Ft.Rucker)

Model Avionics are not beginners at this game but with
Frequency Band 2.400 - 2.4835 GHz
Channels 80
Channel Spacing 1 MHz
I know we don't see 80 pilots flying on one flight line even at IRCHA but there will be lots of action in the pits and I believe that over 80 TX on at one time is possible. I guess it will not sync without a free freq but will it interfere while searching?
I love new technology.

Nolan Manley
RREMODELS, KBDD, Magnum Fuel
Stratus, ODIN, K3D, ATOM500, Outrage550, 700N, Vibe.
03-29-2004 Over year old.
 
 
captain1
Senior Heliman
Location: Sydney - Australia

Quote 
I guess it will not sync without a free freq but will it interfere while searching?


No, this is very different and you cannot apply the old FM style of thinking here. What they are proposing is a solution using the new digital modulation methods and more importantly the latest network management protocols. IT will be similar to your cell phone - when you switch it on it scans the network for an available slot (not frequency, this is time domain multiplexing not frequency multiplexing - each person gets allocated a time slot to transmit in). When this happens you dont knock everyone else talking on their phone off do you?

It is similar to everyone in the club having their radi on the same frequency but each person ony transmitting for one second each. That way in a 60second slot each person can transmit once and they will not interfere with each other. Only difference here is that each person transmits for a few micro seconds and then wait maybe ten miliseconds before transmitting again. From a 'human' perspective it would look like you are transmitting continiously.

Since coming back to this hobby after a long break (10 years) I have always been surprised that they are still pushing PCM like it is the latest and greatest when the rest of the transmission backrounds (TV etc) are all adopting the more error free digital modulations!

I think if this is correctly implemented it can, no will, revolutionise the hobby!
03-29-2004 Over year old.
 
 
Sar
Elite Veteran
Location: Kingston, NY

It's great to see some smart development on the radio fore-front, not to mention this is a good road to go down to start sending back live telemetry back to the transmitter. It opens up many doors and many lines of thought.

--
Jon
03-29-2004 Over year old.
HOMEPAGE  
 
 
Brett
Veteran
Location: Chicago Burbs

I worked with Spread Spectrum stuff in the late 80's it was developed by the military. Because of the way it works the cost of good stuff would be high, the cost of bad stuff would be....well go buy a SS cordless phone and you will see what I mean.


Spread Spectrum uses wide band, noise-like signals. Because Spread Spectrum signals are noise-like, they are hard to detect. Spread Spectrum signals are also hard to Intercept or demodulate. Further, Spread Spectrum signals are harder to jam (interfere with) than narrowband signals. These Low Probability of Intercept (LPI) and anti-jam (AJ) features are why the military has used Spread Spectrum for so many years. Spread signals are intentionally made to be much wider band than the information they are carrying to make them more noise-like.

Spread Spectrum signals use fast codes that run many times the information bandwidth or data rate. These special "Spreading" codes are called "Pseudo Random" or "Pseudo Noise" codes. They are called "Pseudo" because they are not real gaussian noise.

Spread Spectrum transmitters use similar transmit power levels to narrow band transmitters. Because Spread Spectrum signals are so wide, they transmit at a much lower spectral power density, measured in Watts per Hertz, than narrowband transmitters.
03-29-2004 Over year old.
 
 
staraero1
Key Veteran
Location: Atlantic City, New Jersey

These systems do plug into existing transmitters. The recievers are separate though.

Staraero1
03-29-2004 Over year old.
 
 
blakka_1
Elite Veteran
Location: Northampton

very intrestin. like to see how well it does
03-29-2004 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

With the system we have now on discrete crystal controlled or FSS channels there is a way to monitor the spectrum usage. With SS how do you tell who is using the bandwith available on the cheap. It's one thing for phone or a computer it's quite another for potentially lethal radio controlled device to be safely used with SS. Brett could probably speak to this better than I. If I'm not mistaken the first use of this technology was implemented by the Navy with their VLF burst mode TX's that looked like random background noise. Communication is one thing, control is another.

Terry
03-29-2004 Over year old.
HOMEPAGE  
 
 
Heli-Driver
Elite Veteran
Location: Arlington, TX

Just go back into the history here on Runyder about the Throttle Jockey when it was introduced. People who had never seen it, used it or knew anything about it were knocking it and going on about how the GV1 was the "genuine article" etc. The TJ was a cheap toy, yada, yada.

I guess there's plenty of people here that have the opinion that it won't work.... I think they ought to wait and see for themselves once the product is released or at least beta tested.

I'm not so nearsighted that I'll say anything except to cheer Paul Beard on. Model Avionics is a class act company that is changing the way electronics are designed and supported. I for one will be excited to test this new technology. Paul is a great engineer and has a keene sense of what works for this hobby. I doubt he'll dissapoint.

The future of this hobby seems rather bright with exciting stuff like this on the horizon. I can't wait to see what he comes out with next.
03-29-2004 Over year old.
HOMEPAGE  
 
 
Rick_H
Key Veteran
Location: Boulder City, Nevada

This is too good to be true, and with April 1'st just a few day's away I am thinking
03-29-2004 Over year old.
 
 
w.pasman
Elite Veteran
Location: Netherlands

Isn't the 2.4GHz is a 'free' band, every one can transmit everything he likes there ?

I agree that as long as everyone would stick to a nice allocation mechanism such as they suggest for their transmitter, checking for a free band, there would be no problem.

However it's already too late for that I think. F or instance wavelan and wifi cards in PCs PDAs and laptops can be freely configured and thus may cause interference on the channel. That would mean signal loss I guess = receiver lockout and probably a crash? One fool with a PDA or failing bluetooth device on the field may cause a crash?
03-29-2004 Over year old.
HOMEPAGE  
 
 
Smedford
Heliman
Location:

Very cool!!!! The next 20 years is going to be very interesting in the RC world.
03-29-2004 Over year old.
 
 
Choppermario
Senior Heliman
Location: Akron, OH

Seen it implemented already!

There is a guy that flies in our area which already has implemented a system similar to this and used in successfully for many flights. He owns a good sized piece of property that he could easily hove on, only problem was that there is a R/C club right next door to him. So he whipped up an add-on to his Tx and RX and "connected" via spread spectrum. Worked great!

I hope this pans out for mass consumption!

-Mario
03-29-2004 Over year old.
 
 
ChrisW
Senior Heliman
Location: Carlsbad, CA

It CDMA...It works no matter how "crowded"...

...I work for Qualcomm...We hold the vast majority of patents for commercial CDMA. I have utmost confidence that it is a safe method of transmission. As far as number of users is concerned...Theoretically it is infinite... If a CDMA system is implemented correctly you could literally have every heli pilot in the USA at the same field with their radios on and fly your heli safely.

I'm very excited to see this happening as this is really what is needed with all the problems with park flyers & such.

I hope that we can get AMA to get behind this technology and help promote & research the effects of it's use.
-ChrisW
03-29-2004 Over year old.
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Don't brand all of us as a "doubting Thomas". Getting the FCC to approve something like this is the issue. I'm going to wait and see.

Terry
03-29-2004 Over year old.
HOMEPAGE  
 
 
Dr. Fibinotchi
Key Veteran
Location: Sioux Falls SD

hmm..

I agree with some of the above. Technology is changing so fast its hard to keep your computer even updated let alone other technologies. Many of the 'new' technologies are just now filtering down to civilian world that the military may have had our for near a decade.

I read about this type of technoloy coming out for RC world months ago. Yet everyone here would agree we will not see this for a while.


excited hell ya...
03-29-2004 Over year old.
 
 
8 pages [ <<    <    ( 1 )     2      3     NEXT    >> ]16893 viewsPOST REPLY
Mikado Modellhubschrauber . GrandRC . CanoMod

.
.
Main Discussion > HERE COMES THE FUTURE IN RC RADIOS
 PRINT TOPIC Advertisers 

Subscribe to This Topic

Friday, January 9 - 11:47 am - Copyright © 2000 - 2009 runryder.com | email | link to rr | runryder needs cookie