文档介绍：被动门禁系统的设计及其关键技术的研究

摘要

随着汽车电子技术的高速发展,各种移动运输工具上都安装了防盗电子装
置。但是失窃情况还是时有发生,财产安全问题一直倍受关注。被动门禁系统
(PKE)技术是近十几年来汽车电子技术的研究热点之一。它符合未来智能安
全的发展方向,已经逐步成为未来汽车标准配置。
本文在分析和研究PKE系统基本原理和关键技术的基础上,设计和研制了
一个PKE系统原型。硬件设计和研制工作包括:低频LF发射电路,高频UHF发
射电路,接收天线电路等。软件设计和编程工作包括:UHF发射报文格式,LF
发射报文格式。同时还对滚动码技术与加密算法进行了分析和研究,包括
KEELOQ算法和ASE算法,编程实现了一种改进型ASE加密、解密算法。
实验和测试结果表明本文系统的能耗、通讯距离、改进型AES算法的安全
性分析及其在单片机上的运行速度等各项指标基本满足要求。

关键字:被动门禁系统;电子锁;AES;滚码;汽车电子
Design of Passive Keyless Entry System and Research of the Key
Technologies

ABSTRACT

With the rapid development of automobile electronic technologies, various
electronic security devices are installed on vehicles. However cases of having
things stolen happened once in a while. The security of private property has been
highly concerned all the time. The technology of Passive Keyless Entry (PKE) is
one of the hottest research topics of current automobile electronic technologies in
recent years, and it meets the development direction of future intelligent safety. In
the future, PKE has gradually e car’s standard configuration.
This paper is concerned with the design and the research of a PKE
protosystem after the basic principle and the key technologies of PKE system are
thoroughly studied. The design and research work includes: LF transmitting circuit,
UHF transmitting circuit and the receiving antenna circuit. As for the design of
software and programming, this paper achieves several critical technologies, such
as designing the UHF and LF transmitting packets format. The rolling code
technologies and the encryption algorithms,which include the KEELOQ algorithm
and the AES algorithm, are also analysed and studied. A modified AES encryption
algorithm and decryption algorithm are realized.
Experiments and overall tests are done for the system, and the results
demostrate that the energy consumption, communication range, security of the
modified AES algorithm and the runni