It is behind Al Waab Petrol Station.
Or
near Doha College.

in other words....if you go from Ramada signal to Salwa raod.... after crossing Midmac flyover..... reaching the big Qatar Decoration roundabout.... Turn right.... the next signal is Al Waab Signal.

Just before reaching the Signal , there is a service road, enter into it and turn right to the small lane, You can see the Stadium