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Ryou Sawai patents

Recent patents with Ryou Sawai listed as an inventor - additional entries may be under other spellings.


Ryou Sawai - Related organizations: Sony Corporation patents

Wireless communication system, wireless communication device, and wireless communication method

01/19/17 - 20170019155 - A wireless communication system includes a transmitting device and a receiving device each including a plurality of antennas. A plurality of streams are subjected to spatial multiplexing and are transmitted in a downlink in which packets are transmitted from the transmitting device to the receiving device. In the transmitting device,
Inventors: Ryou Sawai

Wireless communication system, wireless communication device, and wireless communication method

12/03/15 - 20150349868 - A wireless communication system includes a transmitting device and a receiving device each including a plurality of antennas. A plurality of streams are subjected to spatial multiplexing and are transmitted in a downlink in which packets are transmitted from the transmitting device to the receiving device. In the transmitting device,
Inventors: Ryou Sawai

Wireless communication method

12/27/12 - 20120327863 - A wireless communication method is provided which includes the steps of selecting, by a wireless communication device belonging to a communication system operating on a certain communication protocol, a communication protocol among a plurality of communication protocols, exchanging, among a plurality of wireless communication devices including the wireless communication device,
Inventors: Ryou Sawai

Wireless communication apparatus, wireless communication method, and computer program

04/15/10 - 20100091911 - A wireless communication apparatus is provided for receiving packets transmitted with delay amounts different for the respective transmission branches. The wireless communication apparatus includes a plurality of reception branches, a synchronous processing unit for detecting synchronous timing independently for the respective reception branches; and a signal processing unit for performing
Inventors: Ryou Sawai, Hiroaki Takahashi

Wireless communication method

04/15/10 - 20100091711 - A wireless communication method is provided which includes the steps of selecting, by a wireless communication device belonging to a communication system operating on a certain communication protocol, a communication protocol among a plurality of communication protocols, exchanging, among a plurality of wireless communication devices including the wireless communication device,
Inventors: Ryou Sawai

Wireless communication apparatus and wireless communication, and computer program

04/15/10 - 20100091673 - A wireless communication apparatus includes a reception unit configured to receive packets in multiple formats in which two or more different types of preamble information and intra-header control information are multiplexed, a demodulation and decode unit configured to demodulate and decode the received packets, and a measurement unit configured to
Inventors: Ryou Sawai, Tomoya Yamaura

Transmitting apparatus, signal processing method and communication system

02/04/10 - 20100027707 - A transmitting apparatus is provided which includes a signal processing unit to perform signal processing of transmission data and an antenna to transmit transmission data processed by the signal processing unit, and the signal processing unit includes a digital filter to extract a signal component in a given frequency band
Inventors: Hiroaki Takahashi, Ryou Sawai

Wireless communication apparatus, wireless communication method, and computer program

01/21/10 - 20100015928 - A wireless communication apparatus includes a plurality of antenna branches through which radio signals are transmitted and received; a calibration factor acquiring unit that acquires a calibration factor for compensating an unbalance of phase and amplitude between the antenna branches for every predetermined frequency band; a factor memory storing the
Inventors: Hiroaki Takano, Ryou Sawai

Wireless communication apparatus, wireless communication method, and computer program

01/14/10 - 20100008406 - A wireless communication apparatus compensates for phase and amplitude imbalances existing among transmit and receive branches, while also preventing likelihood information and SNR estimation error produced by such imbalance compensation. In an apparatus having a plurality of transmit and receive antennas and respective branches for each antenna, a calibration processor
Inventors: Ryou Sawai, Hiroaki Takano

Receiving apparatus, receiving method and wireless communication system

12/10/09 - 20090305629 - There is provided a receiving apparatus including a plurality of antennas, a phase difference detection unit to detect a phase difference of each of a plurality of received signals received by the plurality of antennas, a phase adjustment unit to align phase of the plurality of received signals based on
Inventors: Seiichi Izumi, Hiroaki Takano, Ryou Sawai, Tomoya Yamaura, Masanori Sato

Wireless communication system, wireless communication device, and wireless communication method

02/26/09 - 20090052578 - A wireless communication system includes a transmitting device and a receiving device each including a plurality of antennas. A plurality of streams are subjected to spatial multiplexing and are transmitted in a downlink in which packets are transmitted from the transmitting device to the receiving device. In the transmitting device,
Inventors: Ryou Sawai


### Ryou Sawai patent invention listings

The bibliographic references displayed about Ryou Sawai's patents are for a recent sample of Ryou Sawai's publicly published patent applications. The inventor/author may have additional bibliographic citations listed at the USPTO.gov. FreshPatents.com is not associated or affiliated in any way with the author/inventor or the United States Patent/Trademark Office but is providing this non-comprehensive sample listing for educational and research purposes using public bibliographic data published and disseminated from the United States Patent/Trademark Office public datafeed. This information is also available for free on the USPTO.gov website. If Ryou Sawai filed recent patent applications under another name, spelling or location then those applications could be listed on an alternate page. If no bibliographic references are listed here, it is possible there are no recent filings or there is a technical issue with the listing--in that case, we recommend doing a search on the USPTO.gov website.

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