Akihisa Ushirokawa

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Pilot signal transmission method and radio communication system for...
- Patent number 8,098,743
- Issue date Jan 17, 2012
- NEC Corporation
- Nahoko Kuroda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Mobile communication system, communication control method, and base...
- Patent number 7,944,950
- Issue date May 17, 2011
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Mobile communication system, communication control method, and base...
- Patent number 7,940,811
- Issue date May 10, 2011
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
FDD/CDMA transmission/reception system
- Patent number 7,830,829
- Issue date Nov 9, 2010
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cellular system and base station specification method in CDMA mode
- Patent number 7,417,975
- Issue date Aug 26, 2008
- NEC Corporation
- Nahoko Takano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
FDD/CDMA receiver having transmission antenna control circuit
- Patent number 7,324,470
- Issue date Jan 29, 2008
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio communication system and transmission mode selecting method
- Patent number 7,257,408
- Issue date Aug 14, 2007
- NEC Corporation
- Shingo Kikuchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Mobile communication system, communication control method, and base...
- Patent number 7,203,208
- Issue date Apr 10, 2007
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Mobile communication system, communication control method, and base...
- Patent number 7,154,915
- Issue date Dec 26, 2006
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Spread code allocation method and base station in CDMA cellular
- Patent number 7,139,284
- Issue date Nov 21, 2006
- NEC Corporation
- Hiroshi Furukawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Demodulation apparatus and demodulation method for mobile communica...
- Patent number 7,039,099
- Issue date May 2, 2006
- NEC Corporation
- Koichi Tamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and base station for allocating pseudo noise code
- Patent number 6,856,608
- Issue date Feb 15, 2005
- NEC Corporation
- Hiroshi Furukawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA adaptive antenna receiving apparatus and communication system
- Patent number 6,714,584
- Issue date Mar 30, 2004
- NEC Corporation
- Naoto Ishii
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adaptive receiving device removing interference from users and mult...
- Patent number 6,665,286
- Issue date Dec 16, 2003
- NEC Corporation
- Yasushi Maruta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Adaptive antenna receiving apparatus
- Patent number 6,509,872
- Issue date Jan 21, 2003
- NEC Corporation
- Naoto Ishii
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
S/N measuring circuit and method, transmitting electric power contr...
- Patent number 6,487,174
- Issue date Nov 26, 2002
- NEC Corporation
- Hironori Mizuguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Mobile station and a method of reducing interference among radio ch...
- Patent number 6,418,320
- Issue date Jul 9, 2002
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA receiver using sampled chip sequence for precision synchroniza...
- Patent number 6,373,881
- Issue date Apr 16, 2002
- NEC Corporation
- Hironori Mizuguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
FDD/CDMA transmission/reception system
- Patent number 6,359,864
- Issue date Mar 19, 2002
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA multiuser receiver featuring a combination of array antenna an...
- Patent number 6,222,498
- Issue date Apr 24, 2001
- NEC Corporation
- Naoto Ishii
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Receiving apparatus for use in CDMA type mobile radio communication...
- Patent number 6,208,683
- Issue date Mar 27, 2001
- NEC Corporation
- Hironori Mizuguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA receiver with antenna array adaptively controlled with combine...
- Patent number 6,205,166
- Issue date Mar 20, 2001
- NEC Corporation
- Yasushi Maruta
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiuser receiving device for use in a CDMA system
- Patent number 6,081,516
- Issue date Jun 27, 2000
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication method and communication system using the same
- Patent number 6,007,238
- Issue date Dec 28, 1999
- NEC Corporation
- Kazuhiro Okanoue
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interference canceller for CDMA
- Patent number 5,930,229
- Issue date Jul 27, 1999
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
FDD/CDMA transmission/reception system
- Patent number 5,886,987
- Issue date Mar 23, 1999
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
CDMA communication system in which interference removing capability...
- Patent number 5,734,647
- Issue date Mar 31, 1998
- NEC
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Diversity receiver in which reception characteristics can be improved
- Patent number 5,701,333
- Issue date Dec 23, 1997
- NEC Corporation
- Kazuhiro Okanoue
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DS/CDMA receiver having an interference cancelling function capable...
- Patent number 5,687,162
- Issue date Nov 11, 1997
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DS/CDMA receiver for high-speed fading environment
- Patent number 5,646,964
- Issue date Jul 8, 1997
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
COMPUTER AND RESOURCE RETRIEVAL METHOD
- Publication number 20140156853
- Publication date Jun 5, 2014
- NEC Corporation
- Shinichiro Suda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...
- Publication number 20110243028
- Publication date Oct 6, 2011
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...
- Publication number 20110243049
- Publication date Oct 6, 2011
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...
- Publication number 20110176470
- Publication date Jul 21, 2011
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...
- Publication number 20110176533
- Publication date Jul 21, 2011
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Band allocation method and radio communication system
- Publication number 20070297381
- Publication date Dec 27, 2007
- NEC Corporation
- Kengo Oketani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Pilot Signal Transmission Method and Radio Communication System for...
- Publication number 20070253450
- Publication date Nov 1, 2007
- Nahoko Kuroda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FDD/CDMA transmission/reception system
- Publication number 20070104154
- Publication date May 10, 2007
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Mobile communication system, communication control method, and base...
- Publication number 20070081501
- Publication date Apr 12, 2007
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Mobile communication system, communication control method, and base...
- Publication number 20070058593
- Publication date Mar 15, 2007
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication control method and communication system for preventin...
- Publication number 20070010209
- Publication date Jan 11, 2007
- NEC Corporation
- Hideki Nishizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Radio transmitting and receiving device and radio communication system
- Publication number 20030137957
- Publication date Jul 24, 2003
- NEC Corporation
- Yoshikazu Kakura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Mobile communication system, communication control method, and base...
- Publication number 20030118057
- Publication date Jun 26, 2003
- NEC Corporation
- Akihisa Ushirokawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Wireless communication system
- Publication number 20030096579
- Publication date May 22, 2003
- NEC Corporation
- Takumi Ito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Cellular system and base station specification method in CDMA mode
- Publication number 20020114308
- Publication date Aug 22, 2002
- NEC Corporation
- Nahoko Takano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Adaptive antenna receiving apparatus
- Publication number 20020041253
- Publication date Apr 11, 2002
- Naoto Ishii
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
FDD/CDMA receiver having transmission antenna control circuit
- Publication number 20020012333
- Publication date Jan 31, 2002
- NEC Corporation
- Shousei Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
MOBILE STATION AND A METHOD OF REDUCING INTERFERENCE AMONG RADIO CH...
- Publication number 20010055968
- Publication date Dec 27, 2001
- SHOUSEI YOSHIDA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Demodulation apparatus and demodulation method for mobile communica...
- Publication number 20010033609
- Publication date Oct 25, 2001
- NEC Corporation
- Koichi Tamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Mobile communications system and connection control method
- Publication number 20010014607
- Publication date Aug 16, 2001
- NEC Corporation
- Hiroshi Furukawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Akihisa Ushirokawa

Person

Patents Grantslast 30 patents

Pilot signal transmission method and radio communication system for...

Mobile communication system, communication control method, and base...

Mobile communication system, communication control method, and base...

FDD/CDMA transmission/reception system

Cellular system and base station specification method in CDMA mode

FDD/CDMA receiver having transmission antenna control circuit

Radio communication system and transmission mode selecting method

Mobile communication system, communication control method, and base...

Mobile communication system, communication control method, and base...

Spread code allocation method and base station in CDMA cellular

Demodulation apparatus and demodulation method for mobile communica...

Method and base station for allocating pseudo noise code

CDMA adaptive antenna receiving apparatus and communication system

Adaptive receiving device removing interference from users and mult...

Adaptive antenna receiving apparatus

S/N measuring circuit and method, transmitting electric power contr...

Mobile station and a method of reducing interference among radio ch...

CDMA receiver using sampled chip sequence for precision synchroniza...

FDD/CDMA transmission/reception system

CDMA multiuser receiver featuring a combination of array antenna an...

Receiving apparatus for use in CDMA type mobile radio communication...

CDMA receiver with antenna array adaptively controlled with combine...

Multiuser receiving device for use in a CDMA system

Communication method and communication system using the same

Interference canceller for CDMA

FDD/CDMA transmission/reception system

CDMA communication system in which interference removing capability...

Diversity receiver in which reception characteristics can be improved

DS/CDMA receiver having an interference cancelling function capable...

DS/CDMA receiver for high-speed fading environment

Patents Applicationslast 30 patents

COMPUTER AND RESOURCE RETRIEVAL METHOD

MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...

MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...

MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...

MOBILE COMMUNICATION SYSTEM, COMMUNICATION CONTROL METHOD, AND BASE...

Band allocation method and radio communication system

Pilot Signal Transmission Method and Radio Communication System for...

FDD/CDMA transmission/reception system

Mobile communication system, communication control method, and base...

Mobile communication system, communication control method, and base...

Communication control method and communication system for preventin...

Radio transmitting and receiving device and radio communication system

Mobile communication system, communication control method, and base...

Wireless communication system

Cellular system and base station specification method in CDMA mode

Adaptive antenna receiving apparatus

FDD/CDMA receiver having transmission antenna control circuit

MOBILE STATION AND A METHOD OF REDUCING INTERFERENCE AMONG RADIO CH...

Demodulation apparatus and demodulation method for mobile communica...

Mobile communications system and connection control method