Low Frequency Radio Transmission for long distance.

The European synchronization source is probably German DCF77, on

actually, once it is despread, the GPS signal is well ABOVE the thermal noise floor

it only "seems" to be near the noise floor due to the spreading

If you had a 'perfect" spectrum analyzer, you wouldn't see it. It is

Nope. The GPS L1 signal is about 24MHz wide: and arrives on earth about at about 26dB below the thermal noise floor. In order to see anything that's 24MHz wide, you'll need to run your spectrum analyzer with a rather wide IF bandwidth, which will bring in plenty of noise under which the signal can hide. You won't see anything unless your perfect spectrum analyzer can run near absolute zero temperature, where the thermal noise is gone.

When you de-spread the spread spectrum signal, and enjoy the benefits of processing gain, the signal becomes rather narrow band (about

On Wed, 20 Apr 2016 21:13:56 -0400, krw Gave us:

You're an idiot.

-192.5 dBm is the thermal noise floor for 1Hz bandwidth in outer space..

-127.5 is the typical received signal strength from a GSP satellite

-111 dBm is the thermal noise floor for COMMERCIAL GPS single channel signal bandwidth (2MHz)

Nice try, punk.

What's a GSP satellite? If you mean GPS, the typical signal power is about -130dBm.

That's correct for L1. Either way, the signal is: 111 - 130 = 19dB below the noise floor.

Drivel: Home made GPS. Looks nice:

I think not.

On Mon, 02 May 2016 12:12:34 -0700, Jeff Liebermann Gave us:

It was supposed to be negative infinity dBm but that "character" is not available.

On Mon, 02 May 2016 12:12:34 -0700, Jeff Liebermann Gave us:

Pissing and moaning about some mild dyslexia? f*ck you "computah" retahd.

On Mon, 02 May 2016 12:25:48 -0700, John Larkin Gave us:

It is supposed to be an infinity sign, idiot.

0 dBm is not negative infinity.

What did you mean?

You're always wrong, AlwaysWrong.

LOL! You're funny!

You're *ALWAYS* wrong. You add to the proof every day. If you had an ounce of gray matter you'd learn how to use Google.

He means that he's wrong. ...about everything.

But when he is wrong, WE are stupid!

That sort of mistake is not going to look good in a proposal. He should check his work before publishing.

...and he's wrong. What would you expect?

On Mon, 02 May 2016 16:17:12 -0700, John Larkin Gave us:

I told you it was supposed to be an infinity symbol

meter range.

Nobody uses infinity when measuring power levels. Negative infinity makes no sense and you're still wrong.

A while ago, I couldn't convince you to say something nice. Perhaps I can get you to admit that you were wrong. Just admit that you screwed up, and we can continue from there. No flame war required. It only hurts for a moment and will do little to damage what is left of your reputation. I know, because my batting average in SED is only slightly better than yours.

On Mon, 02 May 2016 18:15:59 -0700, Jeff Liebermann Gave us:

Negative infinity represents zero power, which is not well expressed in dBm, putz.. So the "value" IS "negative infinity"