Patents by Inventor Shouichi Koga
Shouichi Koga 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: 20080292008Abstract: A channel-estimating apparatus according to the present invention, including: an input unit (2) operable to receive several pieces of channel information (5) from a plurality of receivers (10), (11), in which the plurality of receivers (10), (11) are operable to perform MIMO communication through a plurality of channels; an estimating unit (3) operable to collectively estimate statuses of the plurality of channels in accordance with the several pieces of channel information (5) received by the input unit (2), whereby estimation results (6) are generated; and an output unit (4) operable to feed the estimation results (6) into the plurality of receivers (10), (11). As a result, interference from other pieces of MIMO communication-adapted communication equipment is suppressible, with consequential improvements in both of quality and capacity of communication.Type: ApplicationFiled: April 28, 2005Publication date: November 27, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Jungi Kondo, Shouichi Koga, Yuji Igata
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Publication number: 20070025478Abstract: A receiver including a plurality of receiver branches operable to receive signals, a plurality of sample-and-hold circuits (4), each of which is connected to corresponding one of the receiver branches at the output thereof, a switch (5) connected to the sample-and-hold circuits at outputs thereof, and a demodulating unit (7) connected to the switch (5) at the output thereof. Each of the sample-and-hold circuits (4) is operable to extract a discrete value from the output from corresponding one of the receiver branches.Type: ApplicationFiled: March 8, 2005Publication date: February 1, 2007Inventor: Shouichi Koga
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Patent number: 7123938Abstract: A card device to be inserted into a slot of an electronic apparatus having an electronic apparatus ground and electrically connected to this electronic apparatus, including a single antenna provided on a carrier, a card ground which is disposed on the carrier and electrically connected to the antenna, and a switch for carrying out, at a high frequency, a connection/disconnection of the card ground to/from the electronic apparatus ground in a condition where this card device is inserted in the slot.Type: GrantFiled: July 17, 2002Date of Patent: October 17, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Shouichi Koga, Michinori Kishimoto, Toshiyuki Wakisaka, Masami Wada
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Publication number: 20060159052Abstract: A wireless communication system comprises a base station (4) and terminals (1)-(3). The base station (4) and the terminals (1)-(3) perform a space division multiplex wireless transmission. Each of the base station (4) and the terminals (1)-(3) comprises a multi-beam antenna for a space division multiplex. A beam pattern formed by the multi-beam antenna of the base station (4) is orthogonalized based on transfer function values of a radio-wave-propagation characteristic formed between antenna elements of the multi-beam antenna of the base station (4) and antenna elements of multi-beam antenna of the terminals (1)-(3).Type: ApplicationFiled: November 11, 2004Publication date: July 20, 2006Inventors: Shouichi Koga, Junji Kondo
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Publication number: 20050190725Abstract: Reception level frequency distribution is determined. A frequency correlation bandwidth is determined in accordance with intervals between peaks or dips, or alternatively intervals between intersections wherein the reception level frequency distribution intersects a threshold. At the time of reception start, a training mode period is set up to determine a frequency correlation bandwidth. After the training mode period, signals are received in accordance with the determined frequency correlation bandwidth. The frequency correlation bandwidth is determined with increased precision to avoid a large amount of calculation such as Fourier transform. As a result, the entire diversity reception processing requires a reduced amount of calculation.Type: ApplicationFiled: October 2, 2003Publication date: September 1, 2005Inventors: Toshiyuki Wakisaka, Shouichi Koga, Michinori Kishimoto, Masami Wada
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Publication number: 20030017849Abstract: A card device to be inserted into a slot of an electronic apparatus having an electronic apparatus ground and electrically connected to this electronic apparatus, including a single antenna provided on a carrier, a card ground which is disposed on the carrier and electrically connected to the antenna, and a switch for carrying out, at a high frequency, a connection/disconnection of the card ground to/from the electronic apparatus ground in a condition where this card device is inserted in the slot.Type: ApplicationFiled: July 17, 2002Publication date: January 23, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Shouichi Koga, Michinori Kishimoto, Toshiyuki Wakisaka, Masami Wada
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Patent number: 6243422Abstract: In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuType: GrantFiled: May 18, 1998Date of Patent: June 5, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshio Urabe, Shouichi Koga, Hitoshi Takai, Koji Kai, Hidetoshi Yamasaki
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Patent number: 5901179Abstract: In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuType: GrantFiled: June 4, 1996Date of Patent: May 4, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshio Urabe, Shouichi Koga, Hitoshi Takai, Koji Kai, Hidetoshi Yamasaki
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Patent number: 5825820Abstract: In the transmitter which carries out burst transmission using information data as a packet, if the status is divided into four modes, namely, burst stop mode, burst rising mode, burst continuous mode, and burst falling mode, a waveform shaping equipment designed to read out shaped waveform data for each mode from outputs of either of the two memory tables, the first memory table which holds waveform data for specific data patterns used in common in burst rising mode and burst falling mode and the second memory table which holds waveform data for all data patterns used in the burst continuous mode, or a waveform shaping equipment comprising the third memory table which holds waveform data corresponding to all the data patterns used in the burst rising mode and the fourth memory table which holds waveform data corresponding to all data patterns used in the burst falling mode and generating shaped waveform data by synthesizing the two outputs of the third and the fourth memory tables at the time of burst continuType: GrantFiled: June 23, 1994Date of Patent: October 20, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshio Urabe, Shouichi Koga, Hitoshi Takai, Koji Kai, Hidetoshi Yamasaki