Communication device using an UWB wireless wave

• US 7,102,537 B2
• Filed: 02/20/2004
• Issued: 09/05/2006
• Est. Priority Date: 09/25/2003
• Status: Expired due to Fees

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Arita, Takashi, Inoue, Hiroto
• Primary Examiner(s): Wu, Daniel
• Assistant Examiner(s): BLOUNT, ERIC
• Application Number:
  US10/781,797
• Publication Number:
  US 20050068225A1
• Time in Patent Office: 928 Days
• Field of Search: 340/435
• US Class Current: 340/903
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 13/867 Combination of radar systems with cameras
• CPC Class Codes: G01S 2013/9316 combined with communication equipment with other vehicles or with base stations
• CPC Class Codes: G01S 3/50 the waves arriving at the antennas being pulse modulated and the time difference of their arrival being measured

Abstract

A communication device is disclosed which is comprised of: a transmitter for transmitting an ultra wide band wireless wave pulse; multiple receivers which are disposed equidistant from the transmitter and receive the ultra wide band wireless wave pulse; and distance-measuring equipment which detects a distance or a direction to an object by measuring time intervals between the first reception times when receivers receive the ultra wide band wireless wave pulse directly from the transmitter and the second reception times when the receivers receive a object-reflected wave of the ultra wide band wireless wave pulse.

Claims

1. A communication device comprising:

a transmitter for transmitting an ultra wide band wireless wave pulse;

a plurality of receivers which are disposed equidistant from the transmitter and receive the ultra wide band wireless wave pulse; and

distance-measuring equipment which detects a distance or a direction to an object based on reception times when each of the receivers receives the ultra wide band wireless wave pulse directly from the transmitter and an object-reflected wave thereof.

2. The communication device as claimed in claim 1, wherein communication is performed by the transmitter and the receivers using the ultra wide band wireless wave pulse.

3. A communication system comprising:

a detector including a transmitter which transmits a response request using an ultra wide band wireless wave pulse;

a plurality of receivers which are disposed equidistant from the transmitter and receive the ultra wide band wireless wave pulse; and

distance-measuring equipment which detects a distance or a direction to an object based on reception times when each of the receivers receives the ultra wide band wireless wave pulse directly from the transmitter and an object-reflected wave thereof; and

a response device including a receiver which is installed on the object and receives the ultra wide band wireless wave pulse transmitted from the transmitter of the detector; and

a transmitter which transmits a response request using another ultra wide band wireless wave pulse in response to the reception of the ultra wide band wireless wave pulse from the detector by the receiver of the response device.