The only way available at the moment in Qatar is to sign up with Qtel Mozaic Tv, You need to take the basic package for Qr250 a month includes Broadband and telephone, all channels are then free for the first two months which includes (according to the ADSN website) Abu Dhabi sports HD, due to the demand it will take a couple of weeks to install if you already have a phone, no doubt longer if you dont!) after the two months is up you chose your packages on top of the basic and pay the extra monthly. (Dont know cost of AD sports package via Mozaic).
The other option is to buy the humax HD (With AD sports package) decoder in UAE where they are available in all major electrical shops and hypermarkets such as carefour and Geant, cost is 999AED, you CANNOT buy the card on it's own, the card comes with the box and is valid for one year.
I bought mine today in Dubai, and it is now up and running, roll on Saturday.