21
Atsushi Fukuda, Yasunori Suzuki, Noriyoshi Terada, Toshio Nojima: Radio communication method and apparatus for multiplex transmission of plural signals in the same frequency band. NTT Docomo, Oblon Spivak McClelland Maier & Neustadt P C, June 5, 2007: US07227906 (19 worldwide citation)

Different carrier frequencies are chosen for plural transmitters of a transmitting device and signals are transmitted at frequency bands overlapping each other. In the receiving device weighting coefficients are provided in input-to-output paths of an interchannel interference canceller 21 so that t ...


22
Hironori Sakamoto, Akira Ito, Toshio Nojima: Control circuit for automatically controlled feed forward nonlinear distortion compensation amplifier. Japan Radio, Nippon Telegraph & Telephone Corporation, NTT Mobile Communication Network, Oliff & Berridge, July 5, 1994: US05327096 (17 worldwide citation)

A control circuit for an automatically controlled feed forward nonlinear distortion compensation amplifier. The control circuit controls a distortion detection loop and a distortion removal loop. The distortion detection loop is a loop for feeding forward input to a main amplifier into a first direc ...


23
Yasushi Yamao, Yoshiaki Tarusawa, Toshio Nojima: Radio communication equipment for a mobile station and traffic channel hand-off method using the same.. Nippon Telegraph & Telephone, June 5, 1991: EP0430106-A2 (17 worldwide citation)

In radio communication equipment (10) for use in a mobile station, provision is made for selectively applying either one of the oscillation outputs of first and second local oscillators (15A, 15B) to a transmitting part (13) and a receiving part (14) by first and second RF switches (SW1, SW2), respe ...


24
Yasunori Suzuki, Motoyuki Uchida, Toshio Nojima: Signal power dynamic range compressing circuit and power amplifier using the same. NTT Docomo, Oblon Spivak McClelland Maier & Neustadt P C, September 16, 2003: US06621367 (16 worldwide citation)

In an input signal power dynamic range compressing circuit, an input signal is distributed by a directional coupler to a linear signal transfer path and a compressing signal generating path, and in the compressing signal generating path a compressing signal, which keeps the peak-to-average-power rat ...


25
Yoichi Okubo, Manabu Nakamura, Yasuhiro Takeda, Taizo Ito, Junya Dosaka, Terufumi Nagano, Hidekatsu Ueno, Toshio Nojima: Amplifier apparatus. Hitachi Kokusai Electric, Brundidge & Stanger P C, October 11, 2011: US08035444 (14 worldwide citation)

An amplifier capable of lowering an electrical current flowing in a peak amplifier before a carrier amplifier becomes saturated to thereby improve the efficiency of an entirety of the amplifier is provided. The amplifier includes a carrier amplifier circuit having an amplifying element operable in c ...


26
Taizo Ito, Yoichi Okubo, Junya Dosaka, Toshio Nojima: Distortion compensation apparatus. Hitachi Kokusai Electric, Brundidge & Stanger P C, December 1, 2009: US07626455 (13 worldwide citation)

A distortion compensation apparatus includes distortion generating means for generating distortions to compensate for a distortion generated in an amplifier 2. The distortion generating means includes a nonlinear circuit 13 having an input/output expansion characteristic as a circuit which generates ...


27
Yoshinori Fujiki, Masatoshi Ishida, Nobuaki Imai, Toshio Nojima: Nonlinear signal generating circuit and nonlinear compensating device using the same. NEC Corporation, Nippon Telegraph and Telephone, Sughrue Mion Zinn Macpeak & Seas, February 20, 1990: US04902983 (13 worldwide citation)

A device for compensating for nonlinearity of amplifiers by use of a predistortion principle, and a nonlinear signal generating circuit built in such a device. The nonlinear signal generating circuit includes a quadrature hybrid of the type using a distributed constant line. Two diodes and a termina ...


28
Yasushi Yamao, Yoshiaki Tarusawa, Toshio Nojima: Radio communication equipment for a mobile station and traffic channel hand-off method using the same. Nippon Telegraph and Telephone Corporation, Pollock VandeSande and Priddy, July 27, 1993: US05231632 (12 worldwide citation)

In radio communication equipment for use in a mobile station, provision is made for selectively applying either one of the oscillation outputs of first and second local oscillators to a transmitting part and a receiving part by first and second RF switches, respectively. In a traffic channel hand-of ...


29
Ning Chen, Yoshiaki Tarusawa, Kei Satoh, Shoichi Narahashi, Noriyoshi Terada, Toshio Nojima: High sensitivity radio receiver. NTT Docomo, Oblon Spivak McClelland Maier & Neustadt P C, February 5, 2008: US07327996 (11 worldwide citation)

The invention relates to a high sensitivity receiver installed outdoors which may be used in a base station of a mobile communication system, for example. A received radio frequency signal is converted into a signal in a desired frequency band by a reception bandpass filter RXF3, is subject to a low ...


30
Takahiro Iyama, Yoshiaki Tarusawa, Shinji Uebayashi, Toshio Nojima: Absorption power measuring device. NTT Docomo, Oblon Spivak McClelland Maier & Neustadt P C, March 6, 2007: US07186377 (10 worldwide citation)

In an apparatus for measuring absorbed power including an electromagnetic field probe 1 fixedly mounted within a head simulation phantom 2 which simulates the configuration and the electromagnetic characteristics of a head of a human body, and wherein the strength of an electric field or a magnetic ...