US Patent No: 5,652,764

Number of patents in Portfolio can not be more than 2000

Radio communication system

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ATTORNEY / AGENT: (SPONSORED)
 

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Abstract

Transmission data is spread by spreaders through two orthogonal codes generated by orthogonal code generators, the spread signals are subjected to binary phase modulation with a given carrier wave by BPSK modulators, and are then transmitted from separate antennas positioned in differing spatial locations. Thus, it is possible to provide a radio communication system capable of realizing transmission diversity even in the case of initial transmission where there is yet no information regarding the location, direction, etc., of a partner station, or where a base station is to transmit data directed to all of a plurality of mobile stations, such as in mobile communication systems.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
KABUSHIKI KAISHA TOSHIBATOKYO36116

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kanzaki, Kiyoko Kamakura, JP 2 110
Takahashi, Hidehiro Yokohama, JP 7 102

Cited Art

Patent Info (Count) # Cites Year
 
AT&T BELL LABORATORIES (2)
5,305,353 Method and apparatus for providing time diversity 106 1992
5,289,499 Diversity for direct-sequence spread spectrum systems 62 1992
 
AT&T CORP. (1)
5,394,435 Diversity for direct-sequence spread spectrum systems 65 1994
 
AT&T IPM CORP. (1)
5,457,712 Method for providing time diversity 38 1994
 
CANON KABUSHIKI KAISHA (1)
5,203,018 Space diversity system switching transmission 51 1990
 
MATSUSHITA ELECTRIC WORKS, LTD. (1)
5,280,631 Polarization diversity system suitable for radio communication in indoor space 16 1992
 
NIPPON ELECTRIC CO., LTD. (1)
4,490,830 Radio signal transmission system including a plurality of transmitters for transmitting a common signal 35 1982
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM 2009

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
INTERDIGITAL TECHNOLOGY CORPORATION (18)
6,115,406 Transmission using an antenna array in a CDMA communication system 47 1999
6,373,877 User equipment for use in a CDMA communication system using an antenna array 9 2000
6,278,726 Interference cancellation in a spread spectrum communication system 54 2000
6,574,271 Spread spectrum receiver for receiving a data signal using an adaptive algorithm 17 2001
6,983,008 Base station for use in a CDMA communication system using an antenna array 4 2002
6,574,265 CDMA communication system using an antenna array 0 2002
6,560,300 CDMA communication system using an antenna array 11 2002
6,782,040 Interference cancellation in a spread spectrum communication system 3 2003
6,985,515 Interference cancellation in a spread spectrum communication system 1 2004
7,746,830 System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system 0 2005
7,545,846 Interference cancellation in a spread spectrum communication system 0 2005
7,813,413 Antenna array communication using spreading codes 0 2005
7,684,469 Code division multiple access transmission antenna weighting 0 2006
7,613,226 Method and apparatus for transferring signals in a wireless communication system 0 2008
7,953,139 Interference cancellation in a spread spectrum communication system 1 2009
8,005,129 Acquisition circuit for low chip rate option for mobile telecommunication system 0 2009
8,073,067 Method and apparatus for transferring signals in a wireless communication system 0 2009
8,311,492 Simple block space time transmit diversity using multiple spreading codes 0 2009
 
INTEL CORPORATION (11)
7,079,523 Maintenance link using active/standby request channels 17 2001
8,175,120 Minimal maintenance link to support synchronization 0 2001
7,961,589 System and related methods for introducing sub-carrier diversity in a wideband communication system 0 2001
7,936,728 System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system 0 2001
8,155,096 Antenna control system and method 0 2001
7,551,663 Use of correlation combination to achieve channel detection 2 2002
7,773,566 System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system 0 2004
8,134,980 Transmittal of heartbeat signal at a lower level than heartbeat request 1 2007
8,274,954 Alternate channel for carrying selected message types 0 2009
8,139,546 System and method for maintaining wireless channels over a reverse link of a CDMA wireless communication system 0 2010
8,437,330 Antenna control system and method 0 2012
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (7)
6,252,864 CDMA communication apparatus and CDMA communication method 25 1998
6,226,508 Transmission diversity apparatus 16 1998
6,522,639 Transmission/reception apparatus and transmit power control method 25 1999
6,545,991 Diversity method 2 2000
6,507,574 Transmission/reception apparatus and transmit power control method 7 2000
7,145,886 Communication terminal, base station system, and method of controlling transmission power 2 2000
6,891,817 Transmission apparatus and base station apparatus using the same 6 2002
 
MOTOROLA MOBILITY LLC (5)
6,570,938 Method and apparatus for recovering data symbols from a signal received by a radio communication device 0 1996
6,141,542 Method and apparatus for controlling transmit diversity in a communication system 46 1997
6,038,263 Method and apparatus for transmitting signals in a communication system 66 1997
6,173,005 Apparatus and method for transmitting signals in a communication system 77 1997
6,317,411 Method and system for transmitting and receiving signals transmitted from an antenna array with transmit diversity techniques 98 1999
 
QUALCOMM INCORPORATED (4)
6,134,215 Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel 21 1996
6,795,508 Method and apparatus for obtaining transmit diversity using switched antennas 6 1998
7,881,360 Method and system for increased bandwidth efficiency in multiple input—multiple output channels 0 2004
7,031,398 Method and apparatus for obtaining transmit diversity using switched antennas 1 2004
 
HITACHI DENSHI KABUSHIKI KAISHA (3)
6,137,786 CDMA communication system and method 10 1999
6,597,676 CDMA communication system and method 7 2000
7,545,777 CDMA communication system and method 0 2003
 
LUCENT TECHNOLOGIES INC. (3)
6,370,129 High-speed data services using multiple transmit antennas 47 2000
6,870,825 Pilot signal transmission in a multi-transmit antenna wireless communication system 4 2000
7,400,614 Methods and apparatus for downlink diversity in CDMA using Walsh codes 2 2002
 
NEC CORPORATION (3)
6,404,757 Reception method and apparatus in CDMA system 3 1998
6,415,161 Mobile communication system with transmitting systems with different outputting power 5 1999
7,145,941 Reduction in power consumption in CDMA receiver terminal when signal is received in transmission diversity mode 0 2001
 
ALCATEL (2)
6,636,495 Diversity transmission in a mobile radio system 49 1999
6,469,981 Point-to-multipoint network 4 1999
 
HITACHI, LTD. (2)
5,930,244 CDMA Communication system and method 18 1997
7,916,699 CDMA communication system and method 0 2009
 
LINEX TECHNOLOGIES, INC. OF DE (2)
RE42219 Multiple-input multiple-output (MIMO) spread spectrum system and method 1 2008
RE43812 Multiple-input multiple-output (MIMO) spread-spectrum system and method 0 2011
 
PANASONIC CORPORATION (2)
6,519,238 Transmission apparatus and base station apparatus using the same 4 1999
RE41819 Transmission apparatus and base station apparatus using the same 0 2007
 
SAMSUNG ELECTRONICS CO., LTD. (2)
6,963,601 Apparatus and method for spreading channel data in CDMA communication system using orthogonal transmit diversity 1 2000
6,904,030 Pilot channel power measurement means for a mobile station in asynchronous CDMA communication system 2 2001
 
STMICROELECTRONICS S.R.L. (2)
7,460,581 Method for transmitting signals using antenna diversity, for instance in mobile communication systems, transmitter, receiver and computer program product therefor 2 2004
7,586,979 Method for transmitting signals using antenna diversity, for instance in mobile communication systems, transmitter, receiver and computer program product therefor 1 2008
 
ALCATEL LUCENT (1)
8,155,170 Method and apparatus for achieving channel variability in spread spectrum communication systems 0 2007
 
APPLE INC. (1)
7,280,466 Transmitter for a wireless communications system using multiple codes and multiple antennas 2 2002
 
AT&T CORP. (1)
6,661,856 Decoding for generalized orthogonal design for space-time codes for wireless communication 18 2000
 
CISCO TECHNOLOGY, INC. (1)
7,577,188 Physical layer and MAC enhancements using complex sequences on a wireless channel 0 2001
 
ERICSSON INC. (1)
6,215,762 Communication system and method with orthogonal block encoding 25 1997
 
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (1)
7,173,979 Method and device for transmitting information symbols using a plurality of carriers and method and device for receiving information symbols 10 1999
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
8,027,649 Radio communication system, a transmitter and a receiver 0 2007
 
NAVINI NETWORKS, INC. UNDER THE NAME OF CISCO-NAVINI NETWORKS, INC. (1)
8,412,125 Wireless communication system with transmit diversity designs 0 2007
 
NOKIA SIEMENS NETWORKS GMBH & CO. KG (1)
7,039,368 Method for controlling the formation of a downlink beam 1 2001
 
PENDRAGON WIRELESS LLC (1)
6,937,645 Communication system and a receiver for use in the system 1 2001
 
RPX CORPORATION (1)
6,256,290 Multi-carrier CDMA transmission system with frequency and transmit diversity 25 1998
 
UNIDEN CORPORATION (1)
5,859,875 Transmitter, receiver, communication system, and communication method employing spread spectrum communication technique 38 1997
 
UNWIRED PLANET, LLC (1)
6,925,127 Method and apparatus for subtracting multiple rays of multiple interfering received signals 3 2000