专利名称：DETECTION OF MULTIPATH AND
TRANSMIT LEVEL ADAPTATION THERETO
FOR ULTRASONIC LOCATIONING
发明人：CALVARESE, Rusll, E.
申请号：EP14748033.9
申请日：20140715
公开号：EP3028061A1
公开日：
20160608
专利内容由知识产权出版社提供
摘要：A system and method for detection of multipath and transmit level adaptation thereto in ultrasonic locationing of a mobile device within an environment includes providing fixed ultrasonic emitters for transmitting ultrasonic bursts at predetermined times. A communication device measuring at least a direct signal of each ultrasonic burst and detecting multipath of each ultrasonic burst by comparing an amplitude of the direct signal with other signals related to the ultrasonic burst. If multipath is detected a controller increasing a transmit power level of the ultrasonic burst to insure the direct signal reliably remains above the detection threshold. If multipath is not detected reduce a transmit power level to the point detection is just possible. Results from non-multipath conditions are more heavily weighted when determining position as they are typically more accurate.
申请人：Symbol Technologies, LLC
地址：One Zebra Plaza Holtsville, NY 11742 US
国籍：US
代理机构：Maiwald Patentanwalts GmbH 更多信息请下载全文后查看
