How does 'information theory' to 'amplify' the GPS signal? thanks

Jun 08, 2005 5 Replies

In an attempt not to discourage you from future postings on sci.electronics.design or other newsgroups, I offer the following tips:

- Don't post your question in the message title. It's rude and will usually be ignored.

- Try to provide as much detail as possible in your question. Vague questions get vague answers.

- Be sure to use the correct terminology in your question.

- Mind your grammar.

To answer your question: information theory has almost nothing to do with amplifying a GPS signal. So I suspect you aren't using the terminology you intended to use. I assume you meant one of the following: A: How does information theory apply to a GPS signal? B: How do you amplify a GPS signal. If your question is A, I can offer very little. Information theory deals mainly with the limits and methods of communicating digital information. As far as I know, GPS is a digital transmission that is not especially limited by bandwidth or noise, accordingly, there is probably relatively little that information theory has to say about a GPS signal.

If your question is B, I offer the following information. Ask yourself why you are amplifying it? Then find a suitable amplifier to get from a

1.5GHz GPS signal to whatever output you desire.

These are vague answers, but it was a vague question. Next time please be more specific or else people may not be willing to help out.

Chris

Googling "eb/n0" I find:

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Scott

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DIY Piezo-Gyro, PCB Drill Bot & More Soon!

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POLITICS, n. A strife of interests masquerading as a contest of principles. The conduct of public affairs for private advantage. - Ambrose Bierce

There is no giant behind the devastation of the world?only a shriveled creature with the wizened face of a child who is out to blow up the kitchen because he cannot steal his cookies and eat them, too. - Ayn Rand

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I agree that the OP seems to have a difficult time with english grammar. However the question is likely to do with the ability of a spread spectrum signal (such as GPS) to be properly decoded in what appear to be disastrously low C/N environments. This might be construed as "amplification". I suggest he google CDMA and spread spectrum for more insight.

Also "processing gain." Maybe "correlation receiver," too.

--Mac

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