Patents by Inventor Hidetoshi Kawauchi
Hidetoshi Kawauchi 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).
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Publication number: 20140029661Abstract: The present technique relates to a reception device and a reception method which can improve equalization performance. An equalization processing unit has a time domain equalization unit which equalizes a received signal in a time domain and a frequency domain equalization unit which is provided in parallel to the time domain equalization unit and which equalizes the received signal in a frequency domain, and performs control of switching between the time domain equalization unit and the frequency domain equalization unit. The present technique can be applied to, for example, equalize a signal of data transmitted by way of single carrier transmission or data transmitted by way of multicarrier transmission.Type: ApplicationFiled: May 15, 2012Publication date: January 30, 2014Applicant: SONY CORPORATIONInventors: Katsumi Takaoka, Naoki Yoshimochi, Hidetoshi Kawauchi, Ryo Hasegawa, Hirofumi Maruyama
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Patent number: 8634486Abstract: A signal receiving apparatus includes: a processing unit configured to carry out Fourier transform on Fourier-transform data serving as a Fourier-transform object and carry out Fourier transform on inverse-Fourier-transform data serving as an inverse-Fourier-transform object; and a control unit configured to output pieces of data obtained as a result of the Fourier transform carried out on the Fourier-transform data in an order, in which the pieces of data have been obtained, in a process of outputting the pieces of data and output other pieces of data obtained as a result of the Fourier transform carried out on the inverse-Fourier transform data by rearranging the other pieces of data in a process of outputting the other pieces of data.Type: GrantFiled: September 19, 2011Date of Patent: January 21, 2014Assignee: Sony CorporationInventors: Ryoji Ikegaya, Hidetoshi Kawauchi, Suguru Houchi, Naoki Yoshimochi
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Patent number: 8537939Abstract: Disclosed herein is a reception apparatus including: a spectrum inversion detection section configured to detect the occurrence or absence of spectrum inversion in a received signal complying with the Digital Video Broadcasting-Terrestrial 2 standard known as DVB-T2, using a P1 signal constituting the received signal; a spectrum inversion section configured to perform a spectrum inversion process on the received signal if the occurrence of the spectrum inversion is detected at least by the spectrum inversion detection section; and a demodulation section configured to demodulate the received signal having undergone the spectrum inversion process if the occurrence of the spectrum inversion is detected by the spectrum inversion detection section, the demodulation section further demodulating the received signal yet to undergo the spectrum inversion process if the absence of the spectrum inversion is detected by the spectrum inversion detection section.Type: GrantFiled: December 13, 2010Date of Patent: September 17, 2013Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Takashi Yokokawa
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Patent number: 8488695Abstract: A receiving apparatus for receiving an orthogonal frequency division multiplexing (OFDM) signal including a frame having one frame length of a plurality of patterns. The apparatus comprises an acquiring section to acquire information regarding a preamble signal from an OFDM signal from a transmitting apparatus; a frame determining section to determine whether the one frame length is short in the frame based on the information regarding the acquired preamble signal; and a time interpolating section to obtain transmission path characteristics by comparing a pilot contained in the preamble signal with a known pilot corresponding to the pilot in a phase of transmission, when the frame determining section determines that the one frame length is short in the frame, and to interpolate a data portion in a time direction based on transmission path characteristics.Type: GrantFiled: December 2, 2010Date of Patent: July 16, 2013Assignee: Sony CorporationInventors: Takashi Yokokawa, Tadaaki Yuba, Hidetoshi Kawauchi, Hitoshi Sakai, Yuken Goto, Suguru Houchi
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Patent number: 8451966Abstract: Disclosed herein is an information processor, including: a receiving section configured to receive an OFDM signal transmitted in accordance with an OFDM system; a FFT arithmetically operating section configured to carry out FFT for a signal within a predetermined interval of the OFDM signal; a delay profile estimating section configured to estimate delay profiles from the OFDM signal received by the receiving section; an inter-symbol interference amount estimating section configured to estimate inter-symbol interference amounts for a plurality of candidates for the predetermined interval, respectively, by using the delay profiles estimated by the delay profile estimating section; and a searching section configured to search for the candidate having the minimum inter-symbol interference amount estimated by the inter-symbol interference amount estimating section from among the plurality of candidates in the predetermined interval, and supply data on the candidate thus searched for as the predetermined intervalType: GrantFiled: September 28, 2009Date of Patent: May 28, 2013Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Toshiyuki Miyauchi, Takashi Yokokawa, Takuya Okamoto, Hiroyuki Kamata
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Patent number: 8437426Abstract: Disclosed herein is a receiving apparatus including: first to third position determination sections configured to determine the start position of an FFT interval which serves as a signal interval targeted for FFT by an FFT section; a selection section configured to select one of those start positions of the FFT interval which are determined by the first through the third position determination section; and the FFT section configured to perform FFT on the OFDM time domain signal by regarding the start position selected by the selection section as the start position of the FFT interval in order to generate the first OFDM frequency domain signal.Type: GrantFiled: September 28, 2009Date of Patent: May 7, 2013Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Masayuki Hattori, Toshiyuki Miyauchi, Takashi Yokokawa, Kazuhiro Shimizu, Kazuhisa Funamoto
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Patent number: 8279956Abstract: Disclosed herein is an information processing apparatus including: a demodulation FFT processing section configured to carry out an FFT process on a demodulation-related signal extracted by making use of a demodulation FFT window from every symbol of a received OFDM signal and output the frequency-domain signal; a control FFT processing section configured to carry out a process equivalent to an FFT process on a control-related signal extracted by making use of a control FFT window from every symbol of the received OFDM signal and output the frequency-domain signal; a transmission-line information estimation section; an equalization section; a reception-quality computation/comparison section; and an FFT-window position control section configured to control the demodulation FFT window to be used by the demodulation FFT processing section and the control FFT window to be used by the control FFT processing section on the basis of a comparison result produced by the reception-quality computation/comparison sectionType: GrantFiled: September 29, 2009Date of Patent: October 2, 2012Assignee: Sony CorporationInventors: Masayuki Hattori, Takashi Yokokawa, Hidetoshi Kawauchi, Hiroyuki Kamata, Ryoji Ikegaya
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Patent number: 8249180Abstract: A receiving apparatus is disclosed which includes a reception device configured to receive a signal modulated through Orthogonal Frequency Division Multiplexing known as OFDM; and a detection device configured to detect whether or not spectrum inversion has occurred in the OFDM-modulated signal by use of a spectrum inversion presence signal obtained by inverting a subcarrier position of a known signal included in the OFDM-modulated signal.Type: GrantFiled: March 30, 2010Date of Patent: August 21, 2012Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Tomoharu Honda
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Patent number: 8175204Abstract: A receiving device includes: a pilot extracting section; a first estimating section; a second estimating section; a third estimating section; a distortion correcting section; and a filter controlling section.Type: GrantFiled: August 20, 2009Date of Patent: May 8, 2012Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Yuken Goto, Takuya Okamoto, Toshiyuki Miyauchi
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Publication number: 20120106619Abstract: A signal processing apparatus includes a signal processing unit configured to carry out signal processing on a single-carrier signal and a multi-carrier signal by making use of a plurality of common filters shared by the single-carrier signal and the multi-carrier signal.Type: ApplicationFiled: September 19, 2011Publication date: May 3, 2012Applicant: Sony CorporationInventors: Hidetoshi KAWAUCHI, Naoki Yoshimochi, Kazukuni Takanohashi
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Publication number: 20120102082Abstract: Disclosed herein is a reception apparatus, including a first equalization section, a second equalization section, and an arithmetic operation section. The first equalization section is adapted to carry out equalization of a signal which represents data transmitted by a transmission method which uses a single carrier. The second equalization section is adapted to carry out equalization of a signal which represents data transmitted by a transmission method which uses multi carriers. The arithmetic operation section is adapted to carry out arithmetic operation for determining information to be used for the equalization by the first equalization section and arithmetic operation for determining information to be used for the equalization by the second equalization section.Type: ApplicationFiled: September 23, 2011Publication date: April 26, 2012Applicant: SONY CORPORATIONInventors: Naoki YOSHIMOCHI, Katsumi Takaoka, Hidetoshi Kawauchi
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Publication number: 20120099681Abstract: A reception apparatus is disclosed which includes: a detection section configured to detect the presence or absence of spectrum inversion in data transmitted by a multi-carrier transmission system based on whether a known signal can be decoded using that part of the transmitted data which has been transmitted by carriers used for transmitting the known signal; and a correction section configured to correct the data transmitted by the multi-carrier transmission system if the presence of spectrum inversion is detected.Type: ApplicationFiled: September 19, 2011Publication date: April 26, 2012Applicant: Sony CorporationInventors: Naoki YOSHIMOCHI, Hidetoshi Kawauchi, Kazukuni Takanohashi
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Publication number: 20120099677Abstract: A signal receiving apparatus includes: a processing unit configured to carry out Fourier transform on Fourier-transform data serving as a Fourier-transform object and carry out Fourier transform on inverse-Fourier-transform data serving as an inverse-Fourier-transform object; and a control unit configured to output pieces of data obtained as a result of the Fourier transform carried out on the Fourier-transform data in an order, in which the pieces of data have been obtained, in a process of outputting the pieces of data and output other pieces of data obtained as a result of the Fourier transform carried out on the inverse-Fourier transform data by rearranging the other pieces of data in a process of outputting the other pieces of data.Type: ApplicationFiled: September 19, 2011Publication date: April 26, 2012Applicant: Sony CorporationInventors: Ryoji IKEGAYA, Hidetoshi Kawauchi, Suguru Houchi, Naoki Yoshimochi
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Patent number: 8139664Abstract: Disclosed herein is a reception apparatus, including, an orthogonal frequency division multiplexing signal reception section, a first filter section, a subtraction section, a second filter section, a coefficient production section, and a Fast Fourier Transformation mathematic operation section.Type: GrantFiled: November 26, 2008Date of Patent: March 20, 2012Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Takashi Yokokawa, Takashi Horiguti, Naoki Yoshimochi, Hiroyuki Kamata, Ryoji Ikegaya, Yasuhiro Iida
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Patent number: 8107519Abstract: An equalizer includes: a replica generation means for generating a replica of a multipath component by applying an adaptive filter to a received signal; a removal means for generating a multipath-component removed signal from which the multipath component has been removed by subtracting the replica from the received signal; a correlation value calculation means for calculating a correlation value between the received signal and the replica; a power value calculation means for calculating a power value of the replica; a determination means for determining whether the replica is the replica of the multipath component based on the correlation value and the power value; and a selection means for outputting the multipath-component removed signal when it is determined that the replica is the replica of the multipath component, and outputting the received signal when it is determined that the replica is not the replica of the multipath component.Type: GrantFiled: September 18, 2009Date of Patent: January 31, 2012Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Naoki Yoshimochi, Ryoji Ikegaya
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Patent number: 8073066Abstract: Disclosed herein is a signal receiving apparatus including a profile inference section; a delay-spread computation section; a position determination section; a signal-by-function multiplication section; an interval extraction section; an interval-to-signal addition section; and a signal processing section.Type: GrantFiled: October 28, 2008Date of Patent: December 6, 2011Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Hideaki Nemoto, Kenichi Kobayashi
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Patent number: 8045945Abstract: A reception apparatus including an extraction section; a transmission line characteristic estimation section; an interpolation section; a compensation section; a detection section; and a selection section.Type: GrantFiled: February 26, 2009Date of Patent: October 25, 2011Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Tadaaki Yuba, Toshiyuki Miyauchi, Takashi Yokokawa, Takuya Okamoto, Tamotsu Ikeda, Koji Naniwada, Kazuhiro Shimizu, Lachlan Bruce Michael
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Patent number: 8045658Abstract: A reception apparatus includes: an extraction section; a transmission line characteristic estimation section; an estimation section; a frequency shift amount production section; a control section; an addition section; a first frequency shifting section; a second frequency shifting section; an interpolation section; a compensation section; a detection section; and an operation section.Type: GrantFiled: October 28, 2008Date of Patent: October 25, 2011Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Tadaaki Yuba, Tamotsu Ikeda, Koji Naniwada, Kazuhiro Shimizu, Lachlan Bruce Michael
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Patent number: 7986615Abstract: A demodulating circuit including: an FFT processing section; an intercarrier interferential component removing section; an extracting section; a transmission path characteristics estimating section; an interpolating section; a symbol sequence estimating section; and an interference replica generating section.Type: GrantFiled: March 13, 2009Date of Patent: July 26, 2011Assignee: Sony CorporationInventors: Hidetoshi Kawauchi, Toshiyuki Miyauchi, Takashi Yokokawa, Takashi Horiguti, Naoki Yoshimochi, Yasuhiro Iida, Satoru Hori
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Publication number: 20110142176Abstract: Disclosed herein is a receiving apparatus for receiving an orthogonal frequency division multiplexing signal, namely, OFDM signal having a frame having one frame length of a plurality of patterns, including: an acquiring section configured to acquire information on a preamble signal from the OFDM signal transmitted from a transmitting apparatus in accordance with an OFDM system; a frame determining section configured to determine whether or not the one frame length is short in the frame based on the information on the preamble signal acquired from the acquiring section; and a time interpolating section configured to obtain transmission path characteristics by comparing a pilot contained in the preamble signal and a known pilot corresponding to the pilot in a phase of transmission with each other when the frame determining section determines that the one frame length is short in the frame, and interpolate a data portion in a time direction based on the transmission path characteristics thus obtained.Type: ApplicationFiled: December 2, 2010Publication date: June 16, 2011Applicant: Sony CorporationInventors: Takashi YOKOKAWA, Tadaaki Yuba, Hidetoshi Kawauchi, Hitoshi Sakai, Yuken Goto, Suguru Houchi