Patents by Inventor Hiroyasu Murata
Hiroyasu Murata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10826743Abstract: A wireless communication device which receives a data signal and a first control signal associated with the data signal from another wireless communication device, the wireless communication device includes a receiver configured to receive, from the another wireless communication device, a series of first frames having a first frame length through a first subband and a series of second frames having a second frame length through a second subband, the second frame length differing from the first frame length, and a processor configured to obtain the first control signal of the first frame through the first subband and the data signal associated with the first control signal of the second frames through the second subband, and specify which of the second frames includes the data signal, based on predetermined information included in the first control signal.Type: GrantFiled: November 26, 2018Date of Patent: November 3, 2020Assignee: FUJITSU LIMITEDInventors: Yoshihiro Kawasaki, Takayoshi Ode, Hiroyasu Murata
-
Publication number: 20190097861Abstract: A wireless communication device which receives a data signal and a first control signal associated with the data signal from another wireless communication device, the wireless communication device includes a receiver configured to receive, from the another wireless communication device, a series of first frames having a first frame length through a first subband and a series of second frames having a second frame length through a second subband, the second frame length differing from the first frame length, and a processor configured to obtain the first control signal of the first frame through the first subband and the data signal associated with the first control signal of the second frames through the second subband, and specify which of the second frames includes the data signal, based on predetermined information included in the first control signal.Type: ApplicationFiled: November 26, 2018Publication date: March 28, 2019Applicant: FUJITSU LIMITEDInventors: YOSHIHIRO KAWASAKI, takayoshi Ode, Hiroyasu Murata
-
Patent number: 7555055Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: June 30, 2009Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Patent number: 7394848Abstract: Timing phase information is extracted from a power spectrum of a received signal whose amplitude is modulated per frame or sub-frame, and timing phase synchronization of the received signal is performed with the timing phase information. Also, a vector signal of the power spectrum is generated, the vector signal is multiplied by another vector signal to be rotated, a sign decision of the rotated vector signal is performed, a result of the sign decision is integrated to be outputted as the timing phase information, and a vector conversion is performed to the integrated value to be fed back as the other vector signal.Type: GrantFiled: January 15, 2003Date of Patent: July 1, 2008Assignee: Fujitsu LimitedInventors: Takashi Kaku, Hiroyasu Murata, Hideo Miyazawa
-
Patent number: 7386037Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side including a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side including a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: November 12, 2004Date of Patent: June 10, 2008Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Patent number: 7295620Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting-unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: November 13, 2007Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Patent number: 7286600Abstract: A power line carrier communication system can effectively reduce leak electromagnetic field generation. Transmission data is copied on a frequency axis, and vector multiplication of a finite-difference function is performed to insert either a zero signal or an inverted signal between original signals.Type: GrantFiled: July 16, 2003Date of Patent: October 23, 2007Assignee: Fujitsu LimitedInventors: Hiroyasu Murata, Takashi Kaku
-
Patent number: 7173984Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side including a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side including a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: February 6, 2007Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Publication number: 20060256890Abstract: In a noise canceling method and an apparatus therefor which notices the colored noise looked macroscopically, positively cancels the dominant noise component in the low frequency band, shifts the S/N value to plus, and can extract the reception signal buried in the low frequency band and having a comparatively high level, a signal in which a time axis, an amplitude, and a phase are specified or a zero-point signal is inserted into a transmission signal by an inserter, a noise component is interpolated by using the specified signal or the zero-point signal by a noise canceler, and an originally transmitted signal is regenerated by subtracting the noise component from the reception signal.Type: ApplicationFiled: July 25, 2006Publication date: November 16, 2006Inventors: Takashi Kaku, Hideo Miyazawa, Takahiro Kurakata, Hiroyasu Murata
-
Patent number: 7126995Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side having a sliding window transmitting unit for transmitting DMT symbols according to the sliding window trough the telephone line to the receiving side, and the receiving side having a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: October 24, 2006Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Patent number: 7110465Abstract: In a noise canceling method and an apparatus therefor which notices the colored noise looked macroscopically, positively cancels the dominant noise component in the low frequency band, shifts the S/N value to plus, and can extract the reception signal buried in the low frequency band and having a comparatively high level, a signal in which a time axis, an amplitude, and a phase are specified or a zero-point signal is inserted into a transmission signal by an inserter, a noise component is interpolated by using the specified signal or the zero-point signal by a noise canceler, and an originally transmitted signal is regenerated by subtracting the noise component from the reception signal.Type: GrantFiled: March 28, 2001Date of Patent: September 19, 2006Assignee: Fujitsu LimitedInventors: Takashi Kaku, Hideo Miyazawa, Takahiro Kurakata, Hiroyasu Murata
-
Patent number: 7088783Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side including a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side including a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reducedType: GrantFiled: August 13, 2004Date of Patent: August 8, 2006Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Patent number: 6978937Abstract: A method of reading information which makes it possible to suppress the size of hardware and a price thereof and to improve an S/N ratio of a reading signal and reading resolution, wherein even if depth of field for reading is enlarged or a concave/convex portion or a blurred portion is left on the reading face, reading precision can be improved. The method includes steps of acquiring from a medium 1, a signal containing binary digit information having a predetermined information length and a one-dimensional arrangement, extracting information concerning an elemental unit length of the information length of the binary digit information from the acquired signal, and reading a ratio of the binary digit information to the information length based on the extracted elemental unit length information.Type: GrantFiled: July 21, 2003Date of Patent: December 27, 2005Assignee: Fujitsu LimitedInventors: Isao Iwaguchi, Takashi Kaku, Hiroyasu Murata, Kozo Yamazaki, Masanori Ohkawa, Mitsuo Watanabe, Hideo Miyazawa
-
Patent number: 6965649Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: May 25, 1999Date of Patent: November 15, 2005Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Patent number: 6944216Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side having a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side having a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: GrantFiled: August 13, 2004Date of Patent: September 13, 2005Assignee: Fujitsu LimitedInventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Publication number: 20050105601Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: ApplicationFiled: November 12, 2004Publication date: May 19, 2005Inventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Publication number: 20050025309Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: ApplicationFiled: August 13, 2004Publication date: February 3, 2005Inventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Publication number: 20050018781Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: ApplicationFiled: August 13, 2004Publication date: January 27, 2005Inventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Publication number: 20050013431Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting-unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: ApplicationFiled: August 13, 2004Publication date: January 20, 2005Inventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki
-
Publication number: 20050013382Abstract: A digital subscriber line communicating system having a central office and a remote terminal connected through a telephone line, the transmitting side comprising a sliding window transmitting unit for transmitting DMT symbols according to the sliding window through the telephone line to the receiving side, and the receiving side comprising a sliding window receiving unit for receiving DMT symbols according to the sliding window from the transmitting side, the sliding window indicating the phase of cross-talk condition due to a TCM-ISDN transmission at the receiving side, whereby TCM cross-talk can be reduced without largely departing from the standard system.Type: ApplicationFiled: August 13, 2004Publication date: January 20, 2005Inventors: Seiji Miyoshi, Yutaka Awata, Hiroyasu Murata, Nobukazu Koizumi, Takashi Sasaki