Patents by Inventor Toshinori Suzuki
Toshinori Suzuki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6907260Abstract: The present invention provides a transmit power controlling method for reducing an influence of incorrect control in a mobile communication system in the CDMA mode. A likelihood of transmit power controlling signal is generated on the basis of the transmit power controlling signal transmitted by a radio base station and the receiving quality, a variation amount of the transmit power is generated on the basis of the likelihood, and the transmit power of a mobile station is controlled on the basis of the variation amount.Type: GrantFiled: December 21, 1999Date of Patent: June 14, 2005Assignees: KDDI Corporation, Hitachi, Ltd.Inventors: Katsuhiko Tsunehara, Takashi Yano, Takaki Uta, Toshiro Suzuki, Toshinori Suzuki
-
Patent number: 6895038Abstract: A low-cost communication system utilizing a code division multiple access, which controls scale-up of an apparatus due to the provision of an interference suppressing function in a base transceiver station, prevents the reduction of channel utilization efficiency, and enables a high-quality communication. Conventionally, a signal obtained through an interference cancellation stage process has been processed at subsequent cascade-connected stages. The interference cancellation stage process has been carried out by cascade-connecting several circuits performing the same process in a multi-stage interference-canceling device. However, in the present invention, by performing a demodulation process for generating replica signals, feeding back the replica signals to a correlation circuit for another demodulation process, and repeating the same signal process, the interference cancellation stage process is carried out. Such a configuration enables reduction of hardware.Type: GrantFiled: January 26, 2001Date of Patent: May 17, 2005Assignees: Hitachi, Ltd., KDDI CorporationInventors: Joichi Saito, Hideki Shimizu, Naoki Tsubaki, Yuuji Ishida, Toshinori Suzuki
-
Patent number: 6856084Abstract: A fluorescent display device having a pseudo half mirror formed on a rear surface a face plate thereof and exhibiting a function like a neutral density filter. The face plate is formed on a whole rear surface thereof with an aluminum film including opening portions, non-opening portions and a solid portion. The opening and non-opening portions cooperate with each other to constitute a pseudo half mirror. The pseudo half mirror has light transmittance determined depending on a ratio in area between the opening portions and the non-opening portions. Thus, the light transmittance may be set as desired by varying the area ratio.Type: GrantFiled: July 2, 2001Date of Patent: February 15, 2005Assignee: Futaba CorporationInventors: Mitsuyoshi Nihei, Yuji Nomura, Yusuke Yasuoka, Toshinori Suzuki, Junichiro Kogure, Tadashi Mizohata
-
Publication number: 20040266473Abstract: The present invention provides a transmit power controlling method for reducing an influence of incorrect control in a mobile communication system in the CDMA mode. A likelihood of transmit power controlling signal is generated on the basis of the transmit power controlling signal transmitted by a radio base station and the receiving quality, a variation amount of the transmit power is generated on the basis of the likelihood, and the transmit power of a mobile station is controlled on the basis of the variation amount.Type: ApplicationFiled: July 27, 2004Publication date: December 30, 2004Inventors: Katsuhiko Tsunehara, Takashi Yano, Takaki Uta, Toshiro Suzuki, Toshinori Suzuki
-
Patent number: 6836484Abstract: A wireless packet communication system includes at least one radio terminal station, and a base station for multiplexing packets to be transmitted using a plurality of subcarriers and for sending the multiplexed packets to the at least one radio terminal station. The system has a unit provided in the base station for simultaneously sending reference signals on the subcarriers with the same level to the at least one radio terminal station, a report unit provided in the at least one radio terminal station for reporting to the base station received conditions of the reference signal of each subcarrier or of each subband corresponding to a frequency band occupied by a plurality of subcarriers, and a unit provided in the base station for allocating the subcarrier or the subband to each of the packets to be transmitted depending upon the reported received conditions of the subcarrier or the subband, the allocation being performed in a transmission order of the packets.Type: GrantFiled: February 23, 2001Date of Patent: December 28, 2004Assignee: DDI CorporationInventor: Toshinori Suzuki
-
Patent number: 6834197Abstract: A base station apparatus, a mobile radio system, and a transmission power control method that can perform transmission power control having the high interference suppressing effect with a smaller processing delay are provided. The base station apparatus comprises: a measurement part for measuring SIRs of a received signal subjected to interference suppression by an interference suppressing receiving circuit in a former stage in an interference suppressing receiving part of the radio base station apparatus, and of a received signal subjected to interference suppression by an interference suppressing receiving circuit in a later stage; a calculation part for calculating a correction SIR based on the obtained SIRs, and for estimating a transmission power control SIR from a current first stage SIR and a past correction SIR; and a signal generator for generating a transmission power control signal by comparing the transmission power control SIR and a target SIR.Type: GrantFiled: November 30, 2000Date of Patent: December 21, 2004Assignees: Hitachi, Ltd., KDDI CorporationInventors: Naruhito Nakahara, Yuuji Ishida, Naoki Tsubaki, Joichi Saito, Toshinori Suzuki, Yoshio Takeuchi, Sumaru Niida
-
Publication number: 20040165650Abstract: A receiver informs a delay profile and CIR measured in an FDE or a Rake receiver, together with a bit error rate of a received signal that is required in a receiver, as quality information to a transmitter. In the transmitter, based on the delay profile and CIR contained in the notified quality information, a number of code division multiplex and a frame format are decided in a decision circuit such that a bit error rate of a received signal, which is necessary on the receiver side, can be obtained. In addition, a transmission selection switch selects one of a unique word insertion unit and a cyclic prefix insertion unit that create a frame format for FDE reception and a pilot insertion unit and a complex scrambling unit that create a frame format for Rake reception, and data is then transmitted.Type: ApplicationFiled: February 17, 2004Publication date: August 26, 2004Applicant: KDDI CorporationInventors: Noriaki Miyazaki, Toshinori Suzuki
-
Patent number: 6763059Abstract: This invention provides a spread spectrum signal demodulator in which a noise component included in respective demodulation symbols is reduced and an effect of interference removal is further improved. Symbol decorrelating means detect correlations between spread codes allocated to spread spectrum signals to be removed and a receiving signal. A symbol deciding means 121 synthesizes one or the plurality of one symbol correlation values b1 to bk in common phase, namely, diversity-synthesizes them so as to decide a symbol. As the symbol decision, hard decision or soft decision can be used. Correlation modification means input the one symbol correlation values b1 to bk output from the symbol decorrelating means and the symbol decided result output from the symbol deciding means 121 thereinto, and modify the symbol correlation values b1 to bk. The modified symbol correlation values d1 to dk are transmitted into interference replicating means so as to be spectrum-spread by corresponding spread codes.Type: GrantFiled: December 7, 2000Date of Patent: July 13, 2004Assignee: DDI CorporationInventors: Toshinori Suzuki, Yoshio Takeuchi
-
Publication number: 20040104662Abstract: The present invention achieves a screen of high luminance with an excellent focus characteristic.Type: ApplicationFiled: October 17, 2003Publication date: June 3, 2004Inventors: Hirofumi Nakamura, Hideki Miyazaki, Masatoki Morimoto, Kouji Shibusa, Toshinori Suzuki
-
Patent number: 6615030Abstract: In order to prevent decrease of channel efficiency and to effectuate high quality communication while moderating increase of apparatus scale of an interference canceler part and cutting down costs, in a mobile communication and radio base station apparatus according to the present invention, an interference cancel processing part within the base station apparatus is provided with reverse spread processing/respread processing parts for performing reverse spread processing and respread processing on received signals, synthesizing processing parts for synthesizing signals that have been subjected to the respread processing, and subtraction processing parts for subtracting the synthesized signal from received signal, in multiple stages. The interference cancel processing part processes received signals of users #1-#k.Type: GrantFiled: September 6, 2000Date of Patent: September 2, 2003Assignees: Hitachi, Ltd., DDI CorporationInventors: Joichi Saito, Naruhito Nakahara, Yuuji Ishida, Naoki Tsubaki, Toshinori Suzuki, Yoshio Takeuchi, Sumaru Niida
-
Publication number: 20030161412Abstract: A method of transmitting adaptive modulation signals using space-time block code matrix from a plurality of antennas, the method comprising the steps of: changing adaptively the number of transmission repeat times of the matrix according to a propagation condition, transforming modulation signals at each transmission repeat timing from each antenna by using the matrix, and sending the transformed signals at each transmission repeat timing from each antenna.Type: ApplicationFiled: January 21, 2003Publication date: August 28, 2003Applicant: KDDI CORPORATIONInventors: Sumaru Niida, Toshinori Suzuki, Yoshio Takeuchi
-
Patent number: 6572786Abstract: A phosphor capable of preventing a deterioration in luminous characteristics thereof, particularly, high-temperature operation characteristics thereof due to a SiO2-containing pigment added thereto. The phosphor has a pigment contained therein, wherein the pigment has SiO2 added thereto and is melted, to thereby be coated with sodium glass. This permits gas generated during operation of the phosphor to be adsorbed on the phosphor as compared with a conventional phosphor to which the pigment subjected to the above-described treatment is not added, resulting in luminance retention of the phosphor after operation thereof being increased. In particular, it permits characteristics of the non-driven phosphor after the high-temperature operation test to be enhanced.Type: GrantFiled: April 23, 2001Date of Patent: June 3, 2003Assignee: Futuba CorporationInventors: Kuniaki Kawatsu, Toshinori Suzuki, Chiyuki Hayakawa
-
Patent number: 6525468Abstract: A fluorescent display device cable of being significantly increased in emission. A grid electrode is formed of a nonleaded conductive paste constituted by Al containing at least one of organic metal and phosphate glass frit by screen printing. This positively prevents precipitation of Pb on the grid electrode due to reduction of PbO by oxidation of Al during calcination of the conductive paste as encountered with the prior art.Type: GrantFiled: June 17, 1999Date of Patent: February 25, 2003Assignee: Futaba CorporationInventors: Hiroyuki Wada, Junichiro Kogure, Masahiro Kato, Kazuhiko Itakura, Akio Namiki, Yoshinari Okamoto, Toshinori Suzuki
-
Patent number: 6526261Abstract: A control method of transmitting power in a cellular system includes a step of measuring a signal to interference power ratio of a received signal at said receiving side, a step of detecting frame errors of the received signal at the receiving side, a step of counting the number of the detected frame errors n(k) (k and n(k) are positive integers and 1≦k≦K) for every M(k) (M(k) is a positive integer) frames, or for last N(k) (N(k) is a positive integer) frames just before the frame error is detected, a step of adjusting a value of a target SIR depending on one or set of the counted numbers of frame error n(1) to n(K), a step of comparing the measured SIR with the adjusted target SIR to provide a compared result, and a step of controlling at the transmitting side the transmitting power depending on the compared result.Type: GrantFiled: March 1, 2000Date of Patent: February 25, 2003Assignee: KDD CorporationInventors: Yoshio Takeuchi, Toshinori Suzuki
-
Patent number: 6351649Abstract: A mobile communication system includes a first and second systems. Each of the first and second systems has a land station and at least one mobile terminal capable of communicating with the land station. The land station of the first system has a broadcasting channel transmission unit for transmitting status information via a broadcasting channel, and the mobile terminal of the second system has a broadcasting channel receiving unit for receiving information in the broadcasting channel to obtain a broadcasting channel receiving condition and the status information, a giving interference estimation unit for estimating giving interference level onto communication of the first system by the second system based upon the obtained broadcasting channel receiving condition and the obtained status information, and an output signal level control unit for controlling output signal level of the mobile terminal of the second system based upon the estimated giving interference level.Type: GrantFiled: March 26, 1999Date of Patent: February 26, 2002Assignee: KDD CorporationInventors: Fumio Watanabe, Yoshio Takeuchi, Toshinori Suzuki, Hisato Iwai, Akira Yamaguchi
-
Publication number: 20020005693Abstract: A fluorescent display device having a pseudo half mirror formed on a rear surface a face plate thereof and exhibiting a function like a neutral density filter. The face plate is formed on a whole rear surface thereof with an aluminum film including opening portions, non-opening portions and a solid portion. The opening and non-opening portions cooperate with each other to constitute a pseudo half mirror. The pseudo half mirror has light transmittance determined depending on a ratio in area between the opening portions and the non-opening portions. Thus, the light transmittance may be set as desired by varying the area ratio.Type: ApplicationFiled: July 2, 2001Publication date: January 17, 2002Applicant: FUTABA DENSHI KOGYO KABUSHIKI KAISHAInventors: Mitsuyoshi Nihei, Yuji Nomura, Yusuke Yasuoka, Toshinori Suzuki, Junichiro Kogure, Tadashi Mizohata
-
Publication number: 20010038664Abstract: A low-cost communication system utilizing a code division multiple access, which controls scale-up of an apparatus due to the provision of an interference suppressing function in a base transceiver station, prevents the reduction of channel utilization efficiency, and enables a high-quality communication. Conventionally, a signal obtained through an interference cancellation stage process has been processed at subsequent cascade-connected stages. The interference cancellation stage process has been carried out by cascade-connecting several circuits performing the same process in a multi-stage interference-canceling device. However, in the present invention, by performing a demodulation process for generating replica signals, feeding back the replica signals to a correlation circuit for another demodulation process, and repeating the same signal process, the interference cancellation stage process is carried out. Such a configuration enables reduction of hardware.Type: ApplicationFiled: January 26, 2001Publication date: November 8, 2001Inventors: Joichi Saito, Hideki Shimizu, Naoki Tsubaki, Yuuji Ishida, Toshinori Suzuki
-
Publication number: 20010032971Abstract: A phosphor capable of preventing a deterioration in luminous characteristics thereof, particularly, high-temperature operation characteristics thereof due to a SiO2-containing pigment added thereto. The phosphor has a pigment contained therein, wherein the pigment has SiO2 added thereto and is melted, to thereby be coated with sodium glass. This permits gas generated during operation of the phosphor to be adsorbed on the phosphor as compared with a conventional phosphor to which the pigment subjected to the above-described treatment is not added, resulting in luminance retention of the phosphor after operation thereof being increased. In particular, it permits characteristics of the non-driven phosphor after the high-temperature operation test to be enhanced.Type: ApplicationFiled: April 23, 2001Publication date: October 25, 2001Inventors: Kuniaki Kawatsu, Toshinori Suzuki, Chiyuki Hayakawa
-
Publication number: 20010024427Abstract: A wireless packet communication system includes at least one radio terminal station, and a base station for multiplexing packets to be transmitted using a plurality of subcarriers and for sending the multiplexed packets to the at least one radio terminal station. The system has a unit provided in the base station for simultaneously sending reference signals on the subcarriers with the same level to the at least one radio terminal station, a report unit provided in the at least one radio terminal station for reporting to the base station received conditions of the reference signal of each subcarrier or of each subband corresponding to a frequency band occupied by a plurality of subcarriers, and a unit provided in the base station for allocating the subcarrier or the subband to each of the packets to be transmitted depending upon the reported received conditions of the subcarrier or the subband, the allocation being performed in a transmission order of the packets.Type: ApplicationFiled: February 23, 2001Publication date: September 27, 2001Applicant: DDI CORPORATIONInventor: Toshinori Suzuki
-
Publication number: 20010019961Abstract: A base station apparatus, a mobile radio system, and a transmission power control method that can perform transmission power control having the high interference suppressing effect with a smaller processing delay are provided. The base station apparatus comprises: a measurement part for measuring SIRs of a received signal subjected to interference suppression by an interference suppressing receiving circuit in a former stage in an interference suppressing receiving part of the radio base station apparatus, and of a received signal subjected to interference suppression by an interference suppressing receiving circuit in a later stage; a calculation part for calculating a correction SIR based on the obtained SIRs, and for estimating a transmission power control SIR from a current first stage SIR and a past correction SIR; and a signal generator for generating a transmission power control signal by comparing the transmission power control SIR and a target SIR.Type: ApplicationFiled: November 30, 2000Publication date: September 6, 2001Inventors: Naruhito Nakahara, Yuuji Ishida, Naoki Tsubaki, Joichi Saito, Toshinori Suzuki, Yoshio Takeuchi, Sumaru Niida