公开(公告)号：US20160205498A1

公开(公告)日：2016-07-14

申请号：US15074012

申请日：2016-03-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MASAMI TAKIGAWA ,  NAOKI HAYASHI ,  JUN FUJIYAMA ,  TORU NISHIMURA

IPC: H04W4/00 ,  H01Q1/32

CPC classification number: H04W4/80 ,  B60R25/245 ,  G08C17/02 ,  G08C2201/91 ,  H01Q1/32

Abstract: This short-distance radio communication system for a vehicle includes an in-vehicle unit having more than one antenna and a portable unit performing radio communications with the in-vehicle unit. The in-vehicle unit transmits a first burst together with a call signal for calling the portable unit through a first antenna, and transmits a second burst subsequent to the first burst through a second antenna. The portable unit receives the signals transmitted from the in-vehicle unit, measures respective received signal strength indicators from the first burst and the second burst contained in the received signals, and responds to the in-vehicle unit according to results of comparing the respective indicators with given thresholds.

Abstract translation: 该用于车辆的短距离无线电通信系统包括具有多于一个天线的车载单元和与车载单元执行无线电通信的便携式单元。 车载单元与用于通过第一天线呼叫便携式单元的呼叫信号一起发送第一突发，并且通过第二天线发送第一突发之后的第二突发。 便携式单元接收从车载单元发送的信号，从包含在接收信号中的第一突发和第二突发测量相应的接收信号强度指示符，并且根据比较各个指示符的结果来响应车载单元 给定阈值。