Patents Assigned to Hitachi Advanced Systems Corporation
-
Patent number: 7811203Abstract: A behavior of a walker is detected according to combination of detection of the walking behavior on a level and an altitude variation of the walker to more accurately detect the behavior of the walker. A burned calorie can be obtained according to the type of the walking behavior. An altitude variation can be obtained more accurately by integrating altitude variation only at sections with vertical movement during walking. A stride is estimated according to the behavior of the walker in consideration of the vertical movement. Obtained position and traveling direction are used for compensating values in inertial navigation system. The behavior with and without vertical movement is used in a walker navigator and a worker observing system including a worker terminal carried by the walker for detecting the behavior of the worker and a worker observing terminal for providing the detected position and behavior of the walker.Type: GrantFiled: September 28, 2006Date of Patent: October 12, 2010Assignees: Hitachi, Ltd., Hitachi Advanced Systems CorporationInventors: Munetoshi Unuma, Fumitaka Otsu, Hideki Inoue, Shinobu Satou, So Higuchi
-
Patent number: 7751381Abstract: To provide a wireless base station comprising an array antenna which transmits packets to terminals, a packet scheduler which determines transmission sequence of the packets, a modulator which generates modulated signals based on the packets, and a beam former for transmission signal which multiplies the packets with array weights for transmission signal and outputs the transmission signal to the array antenna the beam former for transmission signal comprises a memory which stores the array weights for transmission signal associated with the terminals' IDs. The beam former for transmission signal receives the IDs of selected terminals from the packet scheduler, refers to the memory, and selects the array weights for transmission signal by the IDs of the terminals.Type: GrantFiled: February 25, 2005Date of Patent: July 6, 2010Assignees: Hitachi, Ltd., Hitachi Communication Technologies, Ltd., Hitachi Advanced Systems CorporationInventors: Mikio Kuwahara, Kenzaburo Fujishima, Masanori Taira, Koji Meguro, Toru Okamoto
-
Patent number: 7359735Abstract: A radio communication apparatus enhances cell throughput by adaptive selection of spatially multiplexed channels in consideration of interferences in a local cell and reducing load for calculation of array weights by storing them in advance as fixed values and outputting fixed beams. To reduce the calculation load for the adaptive selection of spatially multiplexed channels that takes interferences within the local cell into consideration, the radio communication apparatus adopts a packet scheduling method that selects a combination of fixed beams and determines the number of spatially multiplexed channels, based on the fixed beams for mobile apparatuses with packets waiting to be transmitted and pre-calculated correlative quantities of inter-beam interferences between these fixed beams.Type: GrantFiled: February 4, 2005Date of Patent: April 15, 2008Assignees: Hitachi, Ltd., Hitachi Communication Technologies, Ltd., Hitachi Advanced Systems CorporationInventors: Kenzaburo Fujishima, Mikio Kuwahara, Masanori Taira, Koji Meguro, Toru Okamoto
-
Publication number: 20070072158Abstract: A behavior of a walker is detected according to combination of detection of the walking behavior on a level and an altitude variation of the walker to more accurately detect the behavior of the walker. A burned calorie can be obtained according to the type of the walking behavior. An altitude variation can be obtained more accurately by integrating altitude variation only at sections with vertical movement during walking. A stride is estimated according to the behavior of the walker in consideration of the vertical movement. Obtained position and traveling direction are used for compensating values in inertial navigation system. The behavior with and without vertical movement is used in a walker navigator and a worker observing system including a worker terminal carried by the walker for detecting the behavior of the worker and a worker observing terminal for providing the detected position and behavior of the walker.Type: ApplicationFiled: September 28, 2006Publication date: March 29, 2007Applicants: Hitachi, Ltd., Hitachi Advanced Systems CorporationInventors: Munetoshi Unuma, Fumitaka Otsu, Shinobu Satou, So Higuchi, Hideki Inoue
-
Patent number: 6813445Abstract: An optical crossconnect apparatus which includes one terminal connected to a transmission path from one optical transmission terminal station and another terminal connected to a transmission path from another optical transmission terminal station, a first optical signal switch having “M1” ports and “N1” ports, through which the optical signal can pass, a second optical signal switch having “M2” ports and “N2” ports, through which the optical signal can pass, and “L” optical signal repeaters, one end connected to the “N1” ports of the first optical signal switch, and the other end connected to the “N2” ports of the second optical switch. The “N1” and the “N2” ports are equal to “L” optical signal repeaters.Type: GrantFiled: January 31, 2002Date of Patent: November 2, 2004Assignees: Hitachi, Ltd., Hitachi Advanced Systems CorporationInventors: Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori, Shoichi Hanatani, Hirohisa Sano