National Institute of Information and Communications Technology, Incorporated

Bin Zhen

Ryuji Kohno

Huan-Bang Li

Yihong Qi

A high-precision distance measuring with a reduced error in a distance measuring system which calculates a distance from an arrival time of each pulse signal constituting a pulse sequence is provided. For an oscillator which generates pulse signals by counting the number of pulse signals constituting a received pulse sequence, a relative time difference between a transmitting device and a return device is acquired, a distance from the transmitting device to the return device is calculated, and the calculated distance is corrected based on the calculated relative time difference.

Distance measuring system

A first communication apparatus sequentially generates a pulse sequence having pulse signals arranged based on the UWB communication system, performs a framing process to form a frame having at least a preamble and a data portion on the generated pulse sequence and inserts a preamble segment including a sequence of steady pulse signals in the data portion at a predetermined time interval, and transmits it as a radio wave. A second communication apparatus receives a pulse sequence as a radio wave transmitted from the first communication apparatus, and detects at least the preamble segment from the frame contained in the received pulse sequence through a detection window structured to have a predetermined time length, whereby a transmission timing for the pulse sequence to the first communication apparatuscontrolled according to a state of detection of the preamble segment.

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Tokyo, Japan

Bin Zhen