Re: [ath9k-devel] ath9k: noise floor calibration process

2010-04-28 Thread Peter Stuge
Holger Schurig wrote: > > Now two high powered, low noise Acess Points with a clear line of > > sight would give some real range! > > HAMNET And http://tier.cs.berkeley.edu/wiki/Wireless which changes the MAC layer a bit, for very nice gain in performance. //Peter __

Re: [ath9k-devel] ath9k: noise floor calibration process

2010-04-28 Thread Holger Schurig
>In the USA Amateur radio operators can use 1000 Watts (under certain > conditions) !! Don't count on the 1000 W. Most countries have tight restrictions, only allowing certain frequencies, bandwiths, max PEP, max ERP, max EIRP, max electric field, max magnetic fields. In Germany, with my li

Re: [ath9k-devel] ath9k: noise floor calibration process

2010-04-28 Thread RHS Linux User
Hi Benoit, Yes. Having a patent is nice and probably significant too. However, if using a preamp with a low noise figure results in more signals or stronger (more error free) signals, then it IS better than the chip itself !! It is VERY surprising that no chips I am aware of provide di

Re: [ath9k-devel] ath9k: noise floor calibration process

2010-04-27 Thread Benoit PAPILLAULT
RHS Linux User a écrit : > Hi All, > > > >The chip *FOR SURE* *CANNOT* measure the thermal noise level!! It isn't > that sensitive. That said under some conditions it CAN measure the > local interference level which IS useful. > In fact, that's what I thought first, but according to Athe

Re: [ath9k-devel] ath9k: noise floor calibration process

2010-04-27 Thread RHS Linux User
Hi All, The chip *FOR SURE* *CANNOT* measure the thermal noise level!! It isn't that sensitive. That said under some conditions it CAN measure the local interference level which IS useful. I am *VERY MUCH* in favor of making real time level measurements of various parts of real packet

[ath9k-devel] ath9k: noise floor calibration process

2010-04-27 Thread Benoit PAPILLAULT
Hello, In order to move forward with noise & signal reporting, I'd like to share my current understanding of the way ath9k HW is working before sending patches (unfortunately, I did the work before the introduction of ar9003... so I need to redo the work). The ultimate purpose of this work is