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

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

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 !