A method of communicating with a portable access device includes iteratively performing an algorithm via an access module of a vehicle. The algorithm includes a series of operations including: selecting a frequency from multiple frequencies; selecting an antenna pair from multiple possible antenna pairs, where antennas of the possible antenna pairs include antennas with different polarized axes; transmitting a packet to the portable access device via the selected antenna pair; receiving a first RSSI and a response signal from the portable access device, the first RSSI corresponds to the transmission of the packet; and measuring a second RSSI of the response signal; based on the first RSSIs and the second RSSIs. A best one of the frequencies and a best antenna pair of the possible antenna pairs are selected. One or more additional packets are transmitted using the selected best frequency and the selected best antenna pair.
一种与便携式访问设备通信的方法,包括经由车辆的访问模块迭代地执行算法。该算法包括一系列操作,包括:从多个频率中选择频率;从多个可能的天线对中选择天线对,其中该可能的天线对中的天线包括具有不同极化轴的天线;经由选择的天线对向便携式访问设备发送分组;从便携式访问设备接收第一RSSI和响应信号,该第一RSSI对应于分组的发送;以及测量响应信号的第二RSSI;基于第一RSSI和第二RSSI,频率中的最佳频率和可能的天线对中的最佳天线对被选择。使用选择的最佳频率和选择的最佳天线对来发送一个或多个附加分组。
PASSIVE ENTRY/PASSIVE START COMMUNICATION SYSTEMS WITH SELECTED ANTENNAS HAVING MULTIPLE POLARIZED AXES
利用具有多极化轴的所选择天线的被动进入/被动启动通信系统
2021-05-25
Patent
Elektronische Ressource
Chinesisch
IPC: | H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte / H01Q Antennen , ANTENNAS, i.e. RADIO AERIALS |
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