The Black Stars face the Indomitable Lions in the semi-finals at Stade de Franceville in Gabon.
“The Cameroonians are a bunch of talented players who have survived very difficult teams in the competition," Konadu said, as reported by GNA.
"Therefore, my team will need to put in extra effort to overcome them.
“If you analyze their group very well, you will understand their strength: they came out of a very difficult group and succeeded in eliminating host nation Gabon from the competition.
“They were also responsible for the elimination of Senegal - the hot favourites for the competition - so they are not a side that can be underrated.
“We must work hard if we are to defeat them and progress to the finals of the competition."
Cameroon emerged 1-0 victors in their last meeting with Ghana at the Afcon.
Alain N'Kong scored the only goal on 72 minutes in the tournament hosted by Ghana in 2008.