Driver assist system for use with portable units, has transmitting unit provided in portable unit for sending signal and receiving unit is provided for receiving another signal

摘要

The driver assist system has a transmitting unit (12) provided in a portable unit (10) for sending a signal and a receiving unit (14) is provided for receiving another signal. The time between transmitting and receiving of the two signals is generated by an evaluation and output unit (16). The former signal is received by another receiving unit (24) of another portable unit (20), where the later signal is transmitted by another transmitting unit (22). The communication between the portable units is carried out through a communication module (18,28).