Re: [Openbts-discuss] Amplitude variation in TX?

[Ralph A. S. d. <ra...@sc...>]

Hi,

> http://literature.cdn.keysight.com/litweb/pdf/5968-2320E.pdf

Thanks. I will read through when I find some time. At first glance I can't find any hint that the power of BCCH carrying signals is ramped up and down. 

> I took a quick look at the 3GPP specification, but couldn't find the exact
> wording. In any case, practically all modern GSM downlinks do ramp up and
> ramp down during the guard interval.

I do not see the sense in this. It would create more EMI, increase the bandwidth and the noise on the bands.
 
> TS 05.05 Radio Transmission and Reception - 4.5 Output level dynamic
> operation

Without having the time to read through this right now, the output level only should be dynamic on carriers without BCCH. For those only bursts are transmitted when there is something useful to transmit, of course guard intervals apply, and the power levels are adjusted dynamically as needed. 
 
>  -TT

Ralph.