Patents by Inventor Shozo Okasaka
Shozo Okasaka 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: 8902764Abstract: Provided is a base station device capable of reducing a DL-CSI feedback amount in a TDD type radio communication system in which a DL bandwidth is different from a UL bandwidth. In this device, a demultiplexing unit (133) separates an UL pilot, a DL-CQI, and a DL-CSI fed back from a plurality of UEs as communication partners; a channel estimation unit (134) performs channel sounding by using a UL pilot from a UE in which a DL channel and a UL channel are allocated by overlapping a part of the bandwidth so as to obtain UL-CSI; a control DL-CSI acquisition unit (135) performs interpolation of DL-CSI by using the DL-CSI of some RB contained in the bandwidth where the DL channel and the UL channel fed back from the UE are not overlapped; and a DL close loop control unit (104) combines the estimated UL-CSI and the interpolated DL-CSI so as to use them as DL-CSI for controlling the DL close loop.Type: GrantFiled: December 27, 2007Date of Patent: December 2, 2014Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Tomohiro Imai, Shozo Okasaka, Katsuhiko Hiramatsu
-
Patent number: 8892984Abstract: An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. In the encoder (200), an encoding rate setting unit (250) sets an encoding rate (s?1)/s (s=z), and an information creating unit (210) sets information including from information Xs,i to information Xz?1,i to zero. A first information computing unit (220-1) receives information X1,i at time point i to compute the X1(D) term of formula (1). A second information computing unit (220-2) receives information X2,i at time point i to compute the X2(D) term of formula (1). A third information computing unit (220-3) receives information X3,i at time point i to compute the X3(D) term of formula (1). A parity computing unit (230) receives parity Pi?1 at time point i?1 to compute the P(D) of formula (1). The exclusive OR of the results of the computation is obtained as parity Pi at time i. Ax.Type: GrantFiled: November 5, 2013Date of Patent: November 18, 2014Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20140325304Abstract: A low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after being subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.Type: ApplicationFiled: April 17, 2014Publication date: October 30, 2014Applicant: Panasonic CorporationInventors: Yutaka MURAKAMI, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Patent number: 8745471Abstract: An encoding method and an encoder for creating a low-density parity check convolution code (LDDC-CC), sending a signal sequence after subjecting the code to an error-correction using the low-density parity check convolution code, and creating a low-density parity check code of a time-variant period (3g) by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.Type: GrantFiled: September 26, 2008Date of Patent: June 3, 2014Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20140105168Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: ApplicationFiled: December 26, 2013Publication date: April 17, 2014Applicant: Panasonic CorporationInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
-
Publication number: 20140068370Abstract: An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. In the encoder (200), an encoding rate setting unit (250) sets an encoding rate (s?1)/s (s=z), and an information creating unit (210) sets information including from information Xs,i to information Xz?1,i to zero. A first information computing unit (220-1) receives information X1,i at time point i to compute the X1(D) term of formula (1). A second information computing unit (220-2) receives information X2,i at time point i to compute the X2(D) term of formula (1). A third information computing unit (220-3) receives information X3,i at time point i to compute the X3(D) term of formula (1). A parity computing unit (230) receives parity Pi?1 at time point i?1 to compute the P(D) of formula (1). The exclusive OR of the results of the computation is obtained as parity Pi at time i. Ax.Type: ApplicationFiled: November 5, 2013Publication date: March 6, 2014Inventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Patent number: 8654724Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: GrantFiled: January 28, 2010Date of Patent: February 18, 2014Assignee: Panasonic CorporationInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
-
Patent number: 8654871Abstract: A multicarrier transmitter and a multicarrier receiver improve the reception characteristic of hierarchical modulation multiplex communication. A base station transmits a multicarrier superposition signal of a modulated signal addressed to a far user (a far-user addressed signal) and a modulated signal addressed to a near user (a near-user addressed signal) and modulated with a modulation multivalued number different from that of the far-user addressed signal. The base station separates the far-user addressed signal into frequency range signals, serial/parallel-transforms the near-user addressed signal to generate N1 parallel signals, and combines the generated N1 frequency components and the N1 parallel signals. Since the far-user receiver changes the near-user addressed signal into white noise by inverse discrete Fourier transform, the far-user receiver can demodulate the far-user addressed signal with high accuracy.Type: GrantFiled: October 10, 2008Date of Patent: February 18, 2014Assignee: Panasonic CorporationInventors: Takaaki Kishigami, Shozo Okasaka
-
Patent number: 8620221Abstract: A base station device (10) communicates between a first terminal device and a second terminal device over the same channel by spatial multiplexing. The base station device (10) comprises an interference cancellation coefficient extractor (30) that extracts an interference cancellation coefficient from a signal received from the first terminal device to cancel interference on a propagation channel with the first terminal device in advance, and transmits a pilot signal that contains information related to the interference cancellation coefficient to the second terminal device.Type: GrantFiled: February 5, 2009Date of Patent: December 31, 2013Assignee: Panasonic CorporationInventors: Takaaki Kishigami, Shozo Okasaka
-
Patent number: 8612838Abstract: An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes). An encoding rate setting unit sets an encoding rate (s?1)/s (s=z), and an information creating unit sets information including from information Xs,i to information Xz?1,i to zero. A first information computing unit receives information X1,i at time point i to compute the X1(D) term of a formula. A second information computing unit receives information X2,i at time point i to compute the X2(D) term of the formula. A third information computing unit receives information X3,i at time point i to compute the X3(D) term of the formula. A parity computing unit receives parity Pi?1 at time point i?1 to compute the P(D) of the formula. The exclusive OR of the results of the computation is obtained as parity Pi at time i.Type: GrantFiled: January 31, 2013Date of Patent: December 17, 2013Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20130072242Abstract: Provided are a wireless transmission device, a wireless reception device, and a bandwidth allocation method for, when non-contiguous bands allocation is performed, improving the frequency resource use efficiency of a system and thereby improving the system performance. RIV decoding unit (106) decodes start RBG# and end RBG# that are indicated by each RIV output from scheduling information decoding unit (104). Allocation boundary setting unit (107) previously adds a predetermined predetermined offset to the boundary of each RIV so that the boundaries of the allocations of respective RIVs are different from each other. Based on the start RBG# and end RBG# output from RIV decoding unit (106) and the boundaries of the allocations of respective RIVs output from allocation boundary setting unit (107), transmission bandwidth determination unit (108) determines, as allocated bandwidths, the bandwidths that are indicated by a plurality of RIVs and are not overlapped with each other.Type: ApplicationFiled: January 7, 2011Publication date: March 21, 2013Applicant: PANASONIC CORPORATIONInventors: Takashi Iwai, Akihiko Nishio, Daichi Imamura, Seigo Nakao, Yoshihiko Ogawa, Shozo Okasaka, Masaru Fukuoka
-
Patent number: 8397145Abstract: An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. The encoder exhibits encoding rates realized with a small circuit-scale and a high data reception quality. In the encoder (200), an encoding rate setting unit (250) sets an encoding rate (s?1)/s (s=z), and an information creating unit (210) sets information including from information Xs,i to information Xz?1,i to zero. A first information computing unit (220-1) receives information X1,i at time point i to compute the X1(D) term of formula (1). A second information computing unit (220-2) receives information X2,i at time point i to compute the X2(D) term of formula (1). A third information computing unit (220-3) receives information X3,i at time point i to compute the X3(D) term of formula (1). A parity computing unit (230) receives parity Pi?1 at time point i?1 to compute the P(D) of formula (1). The exclusive OR of the results of the computation is obtained as parity Pi at time i. Ax.Type: GrantFiled: July 6, 2009Date of Patent: March 12, 2013Assignee: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Patent number: 8265182Abstract: Provided is a radio transmission device (100) which can flexibly cope with a request for assuring an error ratio feature during a high transmission rate, a request for increasing a cell coverage, or the like. The radio transmission device (100) includes a first subcarrier modulation unit (104) which forms a first subcarrier modulation signal obtained by converting a plurality of modulation signals into a frequency region; a second subcarrier modulation unit (105) which forms a second subcarrier modulation signal obtained by parallel conversion of a plurality of signals; an IFFT unit (111) which forms an OFDM signal by performing inverse Fourier transform on the first and the second subcarrier modulation signal; and a subcarrier mapping unit (110) which controls allocation of the first and the second subcarrier modulation signals.Type: GrantFiled: March 21, 2008Date of Patent: September 11, 2012Assignee: Panasonic CorporationInventors: Takaaki Kishigami, Shozo Okasaka, Yutaka Murakami
-
Publication number: 20110274073Abstract: A base station able to maintain backward compatibility with an LTE mobile station while minimizing the amount of increase in uplink scheduling information reception and demodulation/decoding processing in independent uplink/downlink cell data transmission. A wireless communication system includes a cell #1, a cell #2, and an LTE-A mobile station, and supports independent uplink/downlink cell data transmission. The base station of the cell #2 arranges a PDCCH+, which includes uplink scheduling information from the LTE-A mobile station to the base station of the cell #2, in a downlink data region in the downlink connection of the base station of the cell #1.Type: ApplicationFiled: January 28, 2010Publication date: November 10, 2011Applicant: PANASONIC CORPORATIONInventors: Atsushi Sumasu, Shozo Okasaka, Shinsuke Takaoka, Seigo Nakao, Daichi Imamura
-
Publication number: 20110041044Abstract: An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. The encoder exhibits encoding rates realized with a small circuit-scale and a high data reception quality. In the encoder (200), an encoding rate setting unit (250) sets an encoding rate (s?1)/s (s=z), and an information creating unit (210) sets information including from information Xs,i to information Xz?1,i to zero. A first information computing unit (220-1) receives information X1,i at time point i to compute the X1(D) term of formula (1). A second information computing unit (220-2) receives information X2,i at time point i to compute the X2(D) term of formula (1). A third information computing unit (220-3) receives information X3,i at time point i to compute the X3(D) term of formula (1). A parity computing unit (230) receives parity Pi?1 at time point i?1 to compute the P(D) of formula (1). The exclusive OR of the results of the computation is obtained as parity Pi at time i. Ax.Type: ApplicationFiled: July 6, 2009Publication date: February 17, 2011Applicant: Panasonic CorporationInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20100323625Abstract: A base station device (10) communicates between a first terminal device and a second terminal device over the same channel by spatial multiplexing. The base station device (10) comprises an interference cancellation coefficient extractor (30) that extracts an interference cancellation coefficient from a signal received from the first terminal device to cancel interference on a propagation channel with the first terminal device in advance, and transmits a pilot signal that contains information related to the interference cancellation coefficient to the second terminal device.Type: ApplicationFiled: February 5, 2009Publication date: December 23, 2010Applicant: PANASONIC CORPORATIONInventors: Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20100315962Abstract: Provided is a base station device capable of reducing a DL-CSI feedback amount in a TDD type radio communication system in which a DL bandwidth is different from a UL bandwidth. In this device, a demultiplexing unit (133) separates an UL pilot, a DL-CQI, and a DL-CSI fed back from a plurality of UEs as communication partners; a channel estimation unit (134) performs channel sounding by using a UL pilot from a UE in which a DL channel and a UL channel are allocated by overlapping a part of the bandwidth so as to obtain UL-CSI; a control DL-CSI acquisition unit (135) performs interpolation of DL-CSI by using the DL-CSI of some RB contained in the bandwidth where the DL channel and the UL channel fed back from the UE are not overlapped; and a DL close loop control unit (104) combines the estimated UL-CSI and the interpolated DL-CSI so as to use them as DL-CSI for controlling the DL close loop.Type: ApplicationFiled: December 27, 2007Publication date: December 16, 2010Inventors: Tomohiro Imai, Shozo Okasaka, Katsuhiko Hiramatsu
-
Publication number: 20100246711Abstract: A multicarrier transmitter and a multicarrier receiver both enabling improvement of the reception characteristic of hierarchical modulation multiplex communication. A base station (100) transmits a multicarrier signal which is a superposition of a modulated signal addressed to a far user and a modulated signal addressed to a near user and modulated with a modulation multivalued number different from that of the modulated signal addressed to the far user. The base station (100) comprises a DFT section (120), an S/P section (125), and a combining section (145). The DFT section (120) separates the modulated signal addressed to the far user into signals in frequency ranges for each symbol. The S/P section (125) serial/parallel-transforms the modulated signal addressed to the near user to generate N1 parallel signals. The combining section (145) combines the N1 frequency components generated by the DFT section (120) and the N1 parallel signals.Type: ApplicationFiled: October 10, 2008Publication date: September 30, 2010Applicant: Panasonic CorporationInventors: Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20100205511Abstract: A low-density parity check convolution code (LDPC-CC) is made, and a signal sequence is sent after subjected to an error-correcting encodement using the low-density parity check convolution code. In this case, a low-density parity check code of a time-variant period (3g) is created by linear operations of first to 3g-th (letter g designates a positive integer) parity check polynomials and input data.Type: ApplicationFiled: September 26, 2008Publication date: August 12, 2010Applicant: PANASONIC CORPORATIONInventors: Yutaka Murakami, Shutai Okamura, Masayuki Orihashi, Takaaki Kishigami, Shozo Okasaka
-
Publication number: 20100104044Abstract: Provided is a radio transmission device (100) which can flexibly cope with a request for assuring an error ratio feature during a high transmission rate, a request for increasing a cell coverage, or the like. The radio transmission device (100) includes a first subcarrier modulation unit (104) which forms a first subcarrier modulation signal obtained by converting a plurality of modulation signals into a frequency region; a second subcarrier modulation unit (105) which forms a second subcarrier modulation signal obtained by parallel conversion of a plurality of signals; an IFFT unit (111) which forms an OFDM signal by performing inverse Fourier transform on the first and the second subcarrier modulation signal; and a subcarrier mapping unit (110) which controls allocation of the first and the second subcarrier modulation signals.Type: ApplicationFiled: March 21, 2008Publication date: April 29, 2010Applicant: Panasonic CorporationInventors: Takaaki Kishigami, Shozo Okasaka, Yutaka Murakami