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Re: [Discuss-gnuradio] MA (Memory Acceleration) and SR-DVB in Karlsruhe,

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] MA (Memory Acceleration) and SR-DVB in Karlsruhe, @ WSR10
Date: Sun, 21 Mar 2010 11:22:47 -0700
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20100301 Fedora/3.0.3-1.fc12 Thunderbird/3.0.3

On 03/15/2010 01:51 AM, Sylvain Munaut wrote:

Both SR-DVB and OpenBTS wrote their own code from scratch,
even though major parts of the computation could have been handled by
GNU Radio processing blocks.  Why?

OpenBTS makes uses of inband signaling to maintain strict TX/RX sync,
AFAIK this is not supported in the standard blocks.

They also tweak the way the RFX are tuned, trying to put the TX carrier
inside a notch of the RX IF filter (at least that's what the docs says).

Not using the standard libs for tuning is however quite annoying because
when you deviate from the standard 2*RFX setup (like 1 RFX or a
RFX+DBSRX or WBX), you have to change a lot of code :(

The universal driver project will make this a lot easier, since it will encapsulate all the daughterboard control code.


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