Suppressing noise signals, esp. for remote controller of motor vehicle immobiliser or central locking system

摘要

The method involves using a first signal (P1) received during a waiting period as a starting signal; after receipt of this signal a predefined active period (AZ) is started. Signals (P2) fed in during the active period are evaluated. After the active period has elapsed the wait state is restarted. A signal can only be identified as the start signal if it corresp. to a reference signal. The active period can be restarted when a predefined signal is received during the wait state.