The Black Cats travel to the capital on Sunday just a point behind the Gunners having picked up four points from their last four games.
"Like ourselves, Arsenal haven't had too good a start to the season," Brown told the South Shield Gazette. "They probably expected a bit more, just as we did.
"What we need is a win to restore some confidence and lift us back up the table. Arsenal have quality players and it will be a very difficult game for us.
"But I'm really looking forward to it. I've had a couple of weeks without a game now and I'm raring to go."
Brown moved to the Stadium of Light over the summer after 15 years at Manchester United.