| 摘要 |
A time-independent, event-based system (10) for receiving (20) and discriminating (32) unique codes from multiple transmitters has an event-based detection cycle instead of a time-based detection cycle. The system (10) detects received ID codes from multiple transmitters and compares the received ID codes with registers for ID codes in an array in memory. Counters corresponding to the stored ID codes increment each time there is a match between the received ID code and the stored ID code. After a predetermined total number of increments, the system evaluates the received signals (22, 24, 26, 28, etc..) to discriminate between ID codes received from desired transmitters (12, 14, 16, 18) and those from undesired transmitters before resetting the counter. Because the system (10) is event based and not a function of time, it will operate over a wide range of time cycles.
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