In an improved diversity repeater (200), a plurality of frame sets (213) corresponding to a message are received by a time stamper (202) such that frames within each frame set are time stamped. An arrival time differentiator (204) determines arrival time differentials (217) for each frame set based on time stamps. An averager (206) averages the arrival time differentials together. The resulting averaged arrival time differentials (219) are used by a voting window determiner to determine a new voting window (221). The new voting window is used to perform voting on frame sets corresponding to a subsequent message.