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31. 发明授权

US07026991B2 Radio transceiver and method of controlling direction of radio-wave emission 失效
公开(公告)号：US07026991B2
公开(公告)日：2006-04-11
申请号：US10859775
申请日：2004-06-03
申请人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
发明人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
IPC分类号： G01S5/04
CPC分类号： H04B7/0617 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/0226 , H04B7/0626
摘要： Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different positions transmit first and second signals that have been spread by mutually orthogonal spreading codes. A mobile station has a phase detector for receiving the first and second signals transmitted from respective ones of the antennas and obtaining a phase difference between these signals, and a direction estimator for calculating the direction of the mobile station, as seen from the base station, based upon the phase difference and for feeding back a signal representing the calculated direction from the mobile station to the base station. The transmitter of the base station transmits data toward the receiver in the calculated direction using a directional antenna.

32. 发明授权

US4602371A High output semiconductor laser device utilizing a mesa-stripe optical confinement region 失效
标题翻译：利用台面条状光限制区域的高输出半导体激光器件
公开(公告)号：US4602371A
公开(公告)日：1986-07-22
申请号：US571578
申请日：1984-01-17
申请人： Toshihiro Kawano , Tsukuru Ohtoshi , Naoki Chinone , Takashi Kajimura , Michiharu Nakamura
发明人： Toshihiro Kawano , Tsukuru Ohtoshi , Naoki Chinone , Takashi Kajimura , Michiharu Nakamura
IPC分类号： H01S5/20 , H01S5/227 , H01S5/32 , H01S3/19
CPC分类号： H01S5/227 , H01S5/2081 , H01S5/2275 , H01S5/3213
摘要： A semiconductor laser device is provided with an optical confinement region constituted by first, second, third and fourth semiconductor layers provided on the upper part of a predetermined semiconductor substrate in contact with each other successively. The first and fourth semiconductor layers are smaller in refractive index than the second and third semiconductor layers, and the third semiconductor layer is larger in refractive index than the second semiconductor layer. On the other hand, the second and fourth semiconductor layers are larger in forbidden bandwidth than the third semiconductor layer. At least the first and fourth semiconductor layers are opposite in conductivity type to each other. In addition to this, the optical confinement region is formed into a mesa-stripe, and both side walls of this mesa-stripe which are substantially parallel to the traveling direction of a laser beam are embedded with a fifth semiconductor layer. Also, the width of the second semiconductor layer in a section perpendicular to the traveling direction of the laser beam and in the direction parallel to a junction within the optical confinement region is made larger than that of the third semiconductor layer. Accordingly, by virtue of this structure, a large output is ensured by this semiconductor laser device.
摘要翻译：半导体激光装置设置有由第一，第二，第三和第四半导体层构成的光限制区域，该第一，第二，第三和第四半导体层依次相互接触地设置在预定半导体衬底的上部。第一和第四半导体层的折射率小于第二和第三半导体层，并且第三半导体层的折射率比第二半导体层大。另一方面，第二和第四半导体层的禁带宽度大于第三半导体层。至少第一和第四半导体层的导电类型彼此相反。除此之外，光限制区域形成为台面条状，并且基本上平行于激光束的行进方向的该台面条的两个侧壁都嵌有第五半导体层。此外，第二半导体层在与激光束的行进方向垂直的部分的宽度以及与光限制区域内的结的平行方向的宽度大于第三半导体层的宽度。因此，通过这种结构，通过该半导体激光器件确保了大的输出。

33. 发明授权

US4599729A Semiconductor laser device having facets provided with dielectric layers 失效
标题翻译：半导体激光器件具有设有电介质层的刻面
公开(公告)号：US4599729A
公开(公告)日：1986-07-08
申请号：US578530
申请日：1984-02-09
申请人： Yoshimitsu Sasaki , Takashi Kajimura , Naoki Chinone , Michiharu Nakamura
发明人： Yoshimitsu Sasaki , Takashi Kajimura , Naoki Chinone , Michiharu Nakamura
IPC分类号： H01S5/00 , H01S5/028 , H01S3/19
CPC分类号： H01S5/028
摘要： In a semiconductor laser device of the type which includes at least one laminate of a first dielectric layer and a second dielectric layer on at least one of the two facets of a resonator and in which the refractive index of the first dielectric layer is lower than that of the second dielectric layer, the improvement wherein the second dielectric layer consists of an amorphous material containing silicon and hydrogen at its essential constituent elements.
摘要翻译：在这种类型的半导体激光器件中，其包括在谐振器的两个面的至少一个面上的第一电介质层和第二电介质层的至少一个层叠体，并且其中第一电介质层的折射率低于第一电介质层的折射率的第二介电层的改进，其中第二介电层由其基本组成元素上含有硅和氢的非晶材料组成。

34. 发明授权

US4073676A GaAs-GaAlAs semiconductor having a periodic corrugation at an interface 失效
标题翻译：在界面处具有周期性波纹的GaAs-GaAlAs半导体
公开(公告)号：US4073676A
公开(公告)日：1978-02-14
申请号：US550769
申请日：1975-02-18
申请人： Kunio Aiki , Michiharu Nakamura , Junichi Umeda
发明人： Kunio Aiki , Michiharu Nakamura , Junichi Umeda
IPC分类号： C30B19/00 , H01L21/208 , H01L21/306 , H01S5/00 , B01J17/04
CPC分类号： H01L21/30612 , H01L21/02395 , H01L21/0243 , H01L21/02463 , H01L21/02546 , H01L21/02625 , H01L21/02628 , Y10S148/084
摘要： A semiconductor device including a GaAs layer having a periodic corrugation on a surface thereof with a GaAsAl layer disposed on the periodic corrugation is formed by contacting a solution consisting of Ga, Al and As heated at a temperature of about 700.degree. C. to the corrugated surface of the GaAs layer and cooling the solution to a temperature of about 670.degree. C. at a cooling rate of 5.degree. C./min. whereby the periodic corrugation is not transfigured so much.
摘要翻译：通过使由Ga，Al组成的溶液和在约700℃的温度下加热的As接触到波纹形状，形成包括在其表面上具有周期性波纹的GaAs层与设置在周期性波纹上的GaAsAl层的半导体器件表面，并以5℃/ min的冷却速度将溶液冷却至约670℃的温度。由此周期性波纹不会变形太多。

35. 发明授权

US4025939A Semiconductor laser device and a method for fabricating the same 失效
标题翻译：半导体激光器件及其制造方法
公开(公告)号：US4025939A
公开(公告)日：1977-05-24
申请号：US606053
申请日：1975-08-20
申请人： Kunio Aiki , Hitachi, Ltd. , Michiharu Nakamura , Jun-Ichi Umeda
发明人： Kunio Aiki , Hitachi, Ltd. , Michiharu Nakamura , Jun-Ichi Umeda
IPC分类号： H01S5/00 , H01S5/12 , H01L33/00 , H01L29/161
CPC分类号： H01S5/12 , H01S5/1215
摘要： A semiconductor laser device comprises an n-type GaAs layer, an n-type GaAlAs layer disposed on the n-type GaAs layer, an optical confinement region comprising a laser active region consisting of GaAs disposed on the n-type GaAlAs layer, a first p-type GaAlAs region whose aluminum content is less than that of the n-type GaAlAs layer, disposed on said laser active region and a second p-type GaAlAs region whose aluminum content is less than that of the first p-type GaAlAs region, the surface of which opposite that disposed on said first p-type GaAlAs region is a periodically corrugated surface, a p-type GaAlAs layer whose aluminum content is more than that of said first p-type GaAlAs region, disposed on the periodically corrugated surface of the second p-type GaAlAs region, a p-type GaAs layer disposed on said p-type GaAlAs layer, and electrodes disposed on the n-type and p-type GaAs layers, respectively, and which has a very low threshold value for laser oscillation and which is fabricated with a very high yield rate.
摘要翻译：一种半导体激光器件包括：n型GaAs层，n型GaAlAs层，设置在n型GaAs层上;光限制区，包括由设置在n型GaAlAs层上的GaAs构成的激光有源区;第一其铝含量小于位于所述激光有源区上的n型GaAlAs层的p型GaAlAs区域和铝含量小于第一p型GaAlAs区域的第二p型GaAlAs区域，其表面设置在所述第一p型GaAlAs区域上的表面是周期性波纹状表面，其铝含量大于所述第一p型GaAlAs区域的铝含量的p型GaAlAs层，其设置在第二p型GaAlAs区域，设置在所述p型GaAlAs层上的p型GaAs层和分别设置在n型和p型GaAs层上的电极，并且具有非常低的激光阈值振荡，是织物以非常高的产量率。

36. 发明授权

US08665781B2 Adaptive modulation and coding 有权
标题翻译：自适应调制和编码
公开(公告)号：US08665781B2
公开(公告)日：2014-03-04
申请号：US11783157
申请日：2007-04-06
申请人： Yassin Aden Awad , Michiharu Nakamura
发明人： Yassin Aden Awad , Michiharu Nakamura
IPC分类号： H04B7/00
CPC分类号： H04L1/0026 , H04B1/70755 , H04L1/0003 , H04L1/0009 , H04L1/0021 , H04L1/0025 , H04L1/0031 , H04L1/1812 , H04W28/18
摘要： A user equipment, for use in a wireless communication system, includes a unit operable to measure a received signal quality in a receiver, a unit operable to report the measuring received signal quality to the transmitter, or a unit operable to report a selected modulation and coding scheme to the transmitter.
摘要翻译：用于无线通信系统的用户设备包括可操作以测量接收机中的接收信号质量的单元，可操作以将测量接收信号质量报告给发射机的单元，或可操作以报告所选择的调制的单元，以及编码方案给发射机。

37. 发明申请

US20070189208A1 Adaptive modulation and coding 有权
标题翻译：自适应调制和编码
公开(公告)号：US20070189208A1
公开(公告)日：2007-08-16
申请号：US11783155
申请日：2007-04-06
申请人： Yassin Awad , Michiharu Nakamura
发明人： Yassin Awad , Michiharu Nakamura
IPC分类号： H04Q7/00
CPC分类号： H04L1/0026 , H04B1/70755 , H04L1/0003 , H04L1/0009 , H04L1/0021 , H04L1/0025 , H04L1/0031 , H04L1/1812 , H04W28/18
摘要： A mobile communication system for transmitting or receiving a signal among a user equipment and a base station, includes the user equipment and the base station. The user equipment includes a unit operable to measure a received signal quality, and a unit operable to report the measuring received signal quality to the base station or a selected modulation and coding scheme to the base station. The base station includes a unit operable to receive the measuring received signal quality at the user equipment or an information indicating a selected modulation and coding scheme at the user equipment.
摘要翻译：一种用于在用户设备和基站之间发送或接收信号的移动通信系统，包括用户设备和基站。用户设备包括可操作以测量接收到的信号质量的单元，以及用于向基站报告测量接收信号质量的单元或所选择的调制和编码方案。基站包括可操作以在用户设备处接收测量接收信号质量的单元或指示在用户设备处选择的调制和编码方案的信息。

38. 发明授权

US06864839B2 Radio transceiver and method of controlling direction of radio-wave emission 有权
标题翻译：无线电收发机和无线电波发射方向的控制方法
公开(公告)号：US06864839B2
公开(公告)日：2005-03-08
申请号：US10413421
申请日：2003-04-14
申请人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
发明人： Hajime Hamada , Michiharu Nakamura , Yasuyuki Oishi
IPC分类号： G01S19/25 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/02 , H01Q3/26 , H04B7/06 , H04B7/08 , H04B7/10 , H04W16/28 , H04W64/00 , H04W88/02 , H04W88/08 , H04W92/10 , G01S5/04
CPC分类号： H04B7/0617 , G01S1/38 , G01S3/14 , G01S3/46 , G01S5/0226 , H04B7/0626
摘要： Disclosed is a method of controlling direction of radio-wave emission of a base-station transmitter which emits radio waves upon providing the radio waves with directivity in the direction of a receiver. Two antennas of a base station that are disposed at different positions transmit first and second signals that have been spread by mutually orthogonal spreading codes. A mobile station has a phase detector for receiving the first and second signals transmitted from respective ones of the antennas and obtaining a phase difference between these signals, and a direction estimator for calculating the direction of the mobile station, as seen from the base station, based upon the phase difference and for feeding back a signal representing the calculated direction from the mobile station to the base station. The transmitter of the base station transmits data toward the receiver in the calculated direction using a directional antenna.
摘要翻译：公开了一种在向接收机的方向提供无线电波的基站发射机的无线电波发射的方向上发射无线电波的方法。设置在不同位置的基站的两个天线发送已经通过相互正交的扩展码扩展的第一和第二信号。移动站具有相位检测器，用于接收从相应天线发送的第一和第二信号，并获得这些信号之间的相位差，以及用于计算移动站的方向的方向估计器，从基站看，基于相位差，并将表示所计算的方向的信号从移动台反馈到基站。基站的发射机使用定向天线在计算出的方向上向接收机发送数据。

39. 发明授权

US06487193B1 Path searched device and CDMA receiver with the same 失效
标题翻译：路径搜索设备和CDMA接收机相同
公开(公告)号：US06487193B1
公开(公告)日：2002-11-26
申请号：US09378265
申请日：1999-08-20
申请人： Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani , Michiharu Nakamura , Koji Matsuyama
发明人： Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani , Michiharu Nakamura , Koji Matsuyama
IPC分类号： H04B7216
CPC分类号： H04B7/18584
摘要： The present invention is directed to a path searching device and a CDMA receiver employing the same, having a reduced circuit scale and operating to carry out a smaller number of operations. For a direct spreading CDMA communication system, a CDMA receiver includes a reception demodulator including an antenna, a high-frequency amplifier a band-pass filter, demodulators, etc. The CDMA receiver also has despreading units, a determination unit, and a path search device. The path search device has a sampling unit for sampling an input signal by low-speed oversampling based on an integer multiple of a chip rate and by high-speed oversampling that is faster than the low-speed oversampling, a first circuit for finding a correlative value between a spreading code and a signal provided by the low-speed oversampling and finding timing corresponding to a maximum correlative value. A second circuit for finding despreading timing according to correlative values between a signal provided by the high-speed oversampling and a spreading code corresponding to the timing provided by the first circuit.
摘要翻译：本发明涉及一种路径搜索装置和采用该路径搜索装置的CDMA接收机，其具有减小的电路规模并且操作以执行较少数量的操作。对于直接扩频CDMA通信系统，CDMA接收机包括接收解调器，包括天线，高频放大器，带通滤波器，解调器等。CDMA接收机还具有解扩单元，确定单元和路径搜索设备。路径搜索装置具有采样单元，用于通过基于芯片速率的整数倍的低速过采样和通过比低速过采样快的高速过采样来对输入信号进行采样，用于找到相关的第一电路扩展码与由对应于最大相关值的低速过采样和寻找定时提供的信号之间的值。根据由高速过采样提供的信号与对应于由第一电路提供的定时的扩展码之间的相关值，找到解扩定时的第二电路。

40. 发明授权

US06442218B1 Demodulator 失效
标题翻译：解调器
公开(公告)号：US06442218B1
公开(公告)日：2002-08-27
申请号：US09377141
申请日：1999-08-19
申请人： Michiharu Nakamura , Yasuyuki Oishi , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano , Hiroyuki Seki , Yoshinori Tanaka
发明人： Michiharu Nakamura , Yasuyuki Oishi , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano , Hiroyuki Seki , Yoshinori Tanaka
IPC分类号： H03D100
CPC分类号： H04L25/062 , H04L25/03114
摘要： The present invention relates to a demodulator which receives a signal transmitted via phase modulation or multivalue QAM modulation, and decides transmitted data based on the received signal. The present invention enhances a transmission-line estimate by using tentatively decided data symbols as pilot symbols and in estimating a transmission line without a decrease in accuracy of transmission-line estimate even when an error rate of the tentatively decided data symbols is increased. The demodulator includes a pilot-based transmission-line estimation unit for estimating transmission-line characteristics by using pilot symbols. A tentative-data-decision unit for tentatively deciding data symbols based on the pilot-based transmission-line estimate. A data-based transmission-line estimation unit for estimating the transmission-line characteristics by using the tentatively decided data. Weight-coefficient-multiplication units for multiplying pilot-based and data-based transmission-line estimates by respective weights having a ratio therebetween varying in accordance with reliability of the tentatively ascertained data. A pilot&data-based transmission-line estimation unit for obtaining a transmission-line estimate by averaging weighted transmission-line estimates.
摘要翻译：本发明涉及一种接收通过相位调制或多值QAM调制发送的信号的解调器，并且基于接收到的信号来确定发送的数据。本发明通过使用暂时确定的数据符号作为导频符号，并且即使当临时确定的数据符号的错误率增加时，也不会降低传输线估计的精度，来增强传输线估计。解调器包括基于导频的传输线估计单元，用于通过使用导频符号估计传输线特性。一种暂定数据判定单元，用于基于基于导频的传输线估计暂时地确定数据符号。一种基于数据的传输线估计单元，用于通过使用暂时确定的数据来估计传输线特性。权重系数乘法单元，用于乘以基于导频和基于数据的传输线估计，其各自的权重之间的比率根据暂时确定的数据的可靠性而变化。一种基于导频和数据的传输线估计单元，用于通过对加权的传输线估计进行平均来获得传输线估计。

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