| 摘要 |
A system for remote entry includes at least one trainable radio frequency transmitter having a plurality of selectable codes, any of which selected in accordance with a corresponding training code data. At least one receiver is configured to receive signals from said radio frequency transmitter, where the radio frequency transmitter is configured to transmit, and the receiver is configured to receive, coded radio frequency transmissions containing at least sparse binary codes that include binary transmissions implemented with a small duty cycle, corresponding to the training code data. |
