发明名称 |
Verfahren zur Erzeugung und Übertragung von Funktionsbefehlen |
摘要 |
The code is transmitted by a high-frequency modulator (9) under the control of a microprocessor (2) with data memory, pseudo-random generator (3) and oscillator crystal (4). It includes fixed code data and variable data which are modified in the transmitter and receiver in accordance with the same scheme. Only a fraction of the variable code data is transmitted e.g. by UHF radio so that a third party cannot know the entire content of an encoded functional command. USE/ADVANTAGE - For car door lock security, cost is reduced and immunity from interception is improved with half the number of transmitters and receivers. |
申请公布号 |
DE4213141(C2) |
申请公布日期 |
2000.04.27 |
申请号 |
DE19924213141 |
申请日期 |
1992.04.22 |
申请人 |
MANNESMANN VDO AG |
发明人 |
BALTES, ANDREAS;RANZENBERGER, RALF;HASLER, GREGOR |
分类号 |
G07C9/00;H04L9/00;(IPC1-7):H04L9/00;E05B65/12 |
主分类号 |
G07C9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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