Inventor
USHIROKAWA AKIHISA
JP43 patents
⚠️ This page may combine multiple inventors who share the name “USHIROKAWA AKIHISA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
41 patentsUS5325402AJun 28, 1994
Method and arrangement for estimating data sequences transmsitted using Viterbi algorithm
NEC CORP211 citations99
US5621764AApr 15, 1997
Soft decision signal outputting receiver
NEC CORP104 citations97
US6208683B1Mar 27, 2001
Receiving apparatus for use in CDMA type mobile radio communication system comprising a plurality of path receivers each including a follow-up path detection unit
NEC CORP68 citations96
US6205166B1Mar 20, 2001
CDMA receiver with antenna array adaptively controlled with combined errors of despread multipath components
NEC CORP75 citations96
US5930229AJul 27, 1999
Interference canceller for CDMA
NEC CORP83 citations96
US5886987AMar 23, 1999
FDD/CDMA transmission/reception system
NEC CORP68 citations96
US5644603AJul 1, 1997
Maximum-likelihood sequence estimator with variable number of states
NEC CORP66 citations96
US7154915B1Dec 26, 2006
Mobile communication system, communication control method, and base station and mobile station to be employed in the same
NEC CORP20 citations93
US7139284B1Nov 21, 2006
Spread code allocation method and base station in CDMA cellular
NEC CORP29 citations93
US6714584B1Mar 30, 2004
CDMA adaptive antenna receiving apparatus and communication system
NEC CORP49 citations93
US6509872B2Jan 21, 2003
Adaptive antenna receiving apparatus
NEC CORP24 citations93
US6418320B2Jul 9, 2002
Mobile station and a method of reducing interference among radio channels in the mobile station
NEC CORP55 citations93
US6359864B1Mar 19, 2002
FDD/CDMA transmission/reception system
NEC CORP20 citations93
US6081516AJun 27, 2000
Multiuser receiving device for use in a CDMA system
NEC CORP36 citations93
US5701333ADec 23, 1997
Diversity receiver in which reception characteristics can be improved
NEC CORP33 citations93
US5687162ANov 11, 1997
DS/CDMA receiver having an interference cancelling function capable of asssuring a desired reception quality in a narrow-band DS/CDMA
NEC CORP47 citations93
US5519727AMay 21, 1996
Adaptive equalizer
NEC CORP31 citations93
US5448761ASep 5, 1995
Channel assignment in a cellular mobile radio network with a CIR threshold level selected in dependency on priority degrees of channels used in the network
NEC CORP41 citations93
US5444721AAug 22, 1995
Maximum likelihood sequence estimation apparatus
NEC CORP24 citations93
US5323422AJun 21, 1994
Adaptive receiver apparatus
NEC CORP44 citations93
US5272726ADec 21, 1993
Blind type sequence estimator for use in communications system
NEC CORP22 citations93
US5228058AJul 13, 1993
Adaptive equalizer
NEC CORP31 citations93
US6665286B1Dec 16, 2003
Adaptive receiving device removing interference from users and multi-paths by antenna directivity control
NEC CORP24 citations92
US6373881B1Apr 16, 2002
CDMA receiver using sampled chip sequence for precision synchronization with received data sequence
NEC CORP26 citations92
US6222498B1Apr 24, 2001
CDMA multiuser receiver featuring a combination of array antenna and multiuser cancelers
NEC CORP43 citations92
US5363411ANov 8, 1994
Low power consumption receiver with adaptive equalizer
NEC CORP32 citations92
US5646964AJul 8, 1997
DS/CDMA receiver for high-speed fading environment
NEC CORP85 citations91
US6487174B1Nov 26, 2002
S/N measuring circuit and method, transmitting electric power control apparatus and digital communicating system
NEC CORP16 citations84
US7257408B2Aug 14, 2007
Radio communication system and transmission mode selecting method
NEC CORP16 citations83
US7940811B2May 10, 2011
Mobile communication system, communication control method, and base station and mobile station to be employed in the same
NEC CORP5 citations74
US7203208B2Apr 10, 2007
Mobile communication system, communication control method, and base station and mobile station to be employed in the same
NEC CORP7 citations74
US6007238ADec 28, 1999
Communication method and communication system using the same
NEC CORP8 citations74
US5479450ADec 26, 1995
Digital data demodulating apparatus
NEC CORP9 citations74
US5450445ASep 12, 1995
Method and arrangement of estimating data sequences transmitted using viterbi algorithm
NEC CORP14 citations74
US5528627AJun 18, 1996
Signal reception system comprising an adaptive filter
NEC CORP11 citations73
US7417975B2Aug 26, 2008
Cellular system and base station specification method in CDMA mode
NEC CORP4 citations63
US7324470B2Jan 29, 2008
FDD/CDMA receiver having transmission antenna control circuit
NEC CORP3 citations63
US7039099B2May 2, 2006
Demodulation apparatus and demodulation method for mobile communication
NEC CORP4 citations63
US6856608B1Feb 15, 2005
Method and base station for allocating pseudo noise code
NEC CORP3 citations63
US7944950B2May 17, 2011
Mobile communication system, communication control method, and base station and mobile station to be employed in the same
NEC CORP0 citations52
US7830829B2Nov 9, 2010
FDD/CDMA transmission/reception system
NEC CORP0 citations52