Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Arthur R. <art...@gm...>]

Talking about the googling, found this :
https://github.com/davidste/openbts-multi-arfcn based on openbts P2.8.

Yet this does not seem to have been continued so I have my doubts.

Ralph, I did think of all the technical details you provided here but a
reminder is always welcome :)

Le Thu Dec 18 2014 at 12:03:33, Ralph A. Schmid, dk5ras <ra...@sc...>
a écrit :

> Most answers you already have got, just about the technical details…of
> course a software defined radio can transmit several carriers
> simultaneously within its bandwidth. The same applies for reception. For
> the radio it is just a complex sample stream, it makes no difference if one
> broadband or several narrowband signals are transmitted. This bandwidth
> usually is limited from the sampling rate and the link speed between PC and
> radio, also the PC must have enough horsepower, but for GSM the CPU usually
> is not the issue nowadays. Note that the gaps between the ARFCNs also count
> as bandwidth, so transmitting at the same time on 940.0 and 945.0 MHz
> means, more than 5 MHz of real bandwidth are necessary although the ARFCNs
> together occupy only some good 500 KHz.
>
>
>
> UHD is not the problem, the Transceiver52 is the bottleneck, it has to be
> rewritten/extended to server more ARFCNs.
>
>
>
> Ralph.
>
>
>
> *From:* Arthur Rabaté [mailto:art...@gm...]
> *Sent:* Thursday, December 18, 2014 10:38 AM
> *To:* ope...@li...
> *Subject:* [Openbts-discuss] Noob Question about multiple ARFCN
>
>
>
> Hi,
>
>
>
> I am wondering why we can't have multiple ARFCN (contiguous or not) with a
> single TRX.
>
> OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is
> supported but not B200)
>
> I do not know how opencell systems works for multiple arfcns but I can
> only assume that there are multiple trx inside ?
>
>
>
> This question may have been answered before; if so, I will have poorly
> searched.
>
>
>
> Thanks !
>