Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Shoji Goto

Hiroyuki Watanabe

Teppei Shibata

Ken Nakaoka

A wireless communication device mountable in a vehicle acquires first position information on the vehicle and receives a packet signal from another wireless communication device, the packet signal including second position information on another vehicle in which the other wireless communication device is mounted. The wireless communication device has a storage that stores log information and a controller. The controller predicts whether the vehicle crosses the other vehicle at a point of crossing based on the first position information and the second position information, estimates a structure of crossing corresponding to the point of crossing based on the history information, and determines, when it is predicted that the vehicle crosses the other vehicle at the point of crossing, whether or not to notify a presence of the other vehicle to a driver of the vehicle, in accordance with the structure of crossing corresponding to the point of crossing.

Wireless communication device

A digital matched filter includes a received signal holding unit for holding received signal samples, a spreading code generating unit for generating known spreading codes, and a correlation value calculating unit for calculating a correlation value between the received signal samples and the spreading codes. The received signal holding unit is formed of a plurality of registers arranged in parallel and gate circuits are provided at respective preceding stages for masking signal input unless signal writing is to be performed. The correlation value calculating unit is formed of a plurality of slow-operation calculating circuits arranged in parallel. Each calculating circuit is divided into product-sum calculating units at the anterior and posterior stages respectively. The product-sum calculating unit at the posterior stage is stopped when it is not the time of detecting a peak value in order to reduce power consumption.

Growing community of inventors

Gifu, Japan

Shoji Goto