There is provided a system and method for estimating a parameter that represents data describing a physical system. One system includes a pedal operated braking system configured to apply hydraulic brake pressure to brakes of a vehicle when one or more brake pedals are pressed. In addition, the controller generates a signal based on information regarding the recognized ultrasonic wave and transmits the signal to start the voice transmission device. The first lens group includes a negative lens and a positive lens which are arranged in this order from an image side to an object side. The final data packet is forwarded to the target.