[time-nuts] Ultra low phase noise floor measurement system for RF devices.

[Magnus Danielson]

From: SAIDJACK at aol.com
Subject: Re: [time-nuts] Ultra low phase noise floor measurement system for RF devices.
Date: Fri, 30 Mar 2007 13:17:09 EDT
Message-ID: <d4a.3ef9ec9.333ea015 at aol.com>

Said,

> In a message dated 3/29/2007 21:33:44 Pacific Daylight Time,  
> bruce.griffiths at xtra.co.nz writes:
> 
> _http://arxiv.org/PS_cache/physics/pdf/0503/0503015.pdf_ 
> (http://arxiv.org/PS_cache/physics/pdf/0503/0503015.pdf) 
> 
> 
> Hi Bruce,
>  
> Isn't a -200dBc/Hz floor below the thermal noise floor that can be  achieved?
>  
> bye,
> Said

Until I've actually read the paper, ask yourself how our GPS receivers is able
to track signals below their internal noise.

There are a number of tricky aspects involved in doing that and I beleive the
paper goes into those. I have it in print here and will read it as I come back
home.

Cheers,
Magnus