[linux-dvb] [PATCH] frontend.h add dvb-s2 support including backwards compability

Patrick Boettcher patrick.boettcher at desy.de
Wed Feb 22 21:39:56 CET 2006


On Wed, 22 Feb 2006, Marcel Siegert wrote:
> after having our discussion within last november,
> i decided to bring it up again as usable hardware is nearly reaching
> the market.
> i read the discussions again, that we held and suggested to prepare a
> patch that is having both - dvb-s2 capabilities and backwards compatibility.

I am not a signal expert, not at all, but wouldn't it be better to rename 
QPSK_8 to 8PSK and QPSK_B to BPSK? (and accordingly FE_CAN_..)
(see http://en.wikipedia.org/wiki/8PSK)

http://en.wikipedia.org/wiki/DVB-S2 also mentions higher PSK-modulations.

As this is a good chance we might also consider adding the additional 
DVB-H parameter (taking the additional TPS-values into account)?

What about the problems discussed last week about the hierarchy-parameter 
and the selection of LP and HP streams (+ ALPHA value) for DVB-T/H?

IIRC, during the discussion in November someone also mentioned, that 
DVB-S2 also support hierarchical transmissions...

best regards,

   Mail: patrick.boettcher at desy.de
   WWW:  http://www.wi-bw.tfh-wildau.de/~pboettch/

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