Data transmission system for motor vehicle, has control device/identification transmitter transmitting low/high frequency signal to identification transmitter/control device over radio transmitter/receiver

摘要

The system has an identification transmitter (1) and a control device (2), which are communicated over a radio receiver (3) and a radio transmitter (4). The control device transmits a low frequency signal to the transmitter (1) over a transmitter (4). The transmitter (1) transmits a high frequency signal to the control device over the radio receiver, where the high frequency signal is an identification providing radio signal.