The former Newcastle United midfielder earned a valuable point for the R's at the Madejski Stadium, cancelling out Garath McClearly's effort with a 78th-minute strike - which he dedicated to the injured Alejandro Faurlin.
The 31-year-old unveiled a QPR shirt with the number 32 on the back in tribute to the Argentine, and Redknapp is proud of Barton's all-round influence on the team.
"I have to say that Joey has been fantastic," he told the club's official website. "He has been the driving force behind the team this season."
The West London outfit moved to within a point of Burnley at the summit of the Championship following the result.
Redknapp's men host Charlton Athletic at Loftus Road in a fortnight, with the international break halting domestic fixtures next weekend.