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21. 发明专利

JPH10190565A RADIO COMMUNICATION SYSTEM 失效
公开(公告)号：JPH10190565A
公开(公告)日：1998-07-21
申请号：JP35097696
申请日：1996-12-27
申请人： TOSHIBA CORP
发明人： NOUJIN KATSUYA , NAMEKATA MINORU , KAMAGATA EIJI , KUMAKI YOSHINARI , IGUCHI MASAHIRO
IPC分类号： H04B7/26 , H04L12/70 , H04W4/00 , H04W28/04 , H04L12/56
摘要： PROBLEM TO BE SOLVED: To simplify the communication protocol of a system where outgoing channel transmission speed is higher than the incoming channel one and also to improve communication efficiency. SOLUTION: The radio communication system is provided with a narrow band base station 3 providing a bi-directional radio channel, a wide band base station 4 providing an outgoing wide band radio channel with data transmission speed being higher than the bi-directional radio channel which is provided by the narrow band base station 3 and a radio terminal 20 executing radio communication with the base stations 3 and 4. The wide band base station 4 is provided with a timer 9 clocking a prescribed response waiting time after a packet is transmitted to the radio terminal 20 and a radio interface 8 re-transmitting the packet in any one of the cases when the timer 9 becomes time-out or when a REJECT message (NACK) from the radio terminal 20 is received. The radio terminal 20 is provided with the timer 33 clocking the prescribed response waiting time after the packet is transmitted to the narrow band base station 3 through the use of the bi-directional narrow band radio channel and a control part 34 re-transmitting the packet only when the timer 33 becomes time-out.

22. 发明专利

JPH09219615A DIRECTIVITY CONTROL METHOD FOR ADAPTIVE ARRAY TRANSMITTER-RECEIVER, RADIO COMMUNICATION SYSTEM AND ADAPTIVE ARRAY TRANSMITTER-RECEIVER 失效
公开(公告)号：JPH09219615A
公开(公告)日：1997-08-19
申请号：JP2694996
申请日：1996-02-14
申请人： TOSHIBA CORP
发明人： MUKAI MANABU , NAMEKATA MINORU , SHIYOUKI HIROKI
IPC分类号： H01Q3/26 , H04B7/08 , H04B7/10 , H04B7/26
摘要： PROBLEM TO BE SOLVED: To reduce hand-off frequencies and to prevent the deterioration of the communication quality due to inter-station interference, in a radio communication system using an adaptive array transmitter-receiver. SOLUTION: This system performs amplitude and phase weightings for the transmission/reception signals of plural arrayed antenna elements 31 by a weighting device 32 and performs communication between a base station having an adaptive array transmitter-receiver performing the distribution of transmission signals to the antenna elements 31 and the synthesis of the reception signals from the antenna elements 31 in a distribution/synthetic part 33 via the weighting device 32 and plural terminals. At this time, a directivity control is performed by transmitting a reference signal to the adaptive array transmitter-receiver from a desired direction and a non-desired direction at the time of installing the base station, calculating a weighting coefficient in an external arithmetic unit 36 based on the reception signal of the reference signal of the adaptive array transmitter-receiver and setting the coefficient to the weighting device 32 via an interface 35.

23. 发明专利

JPH08331093A RADIO COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH08331093A
公开(公告)日：1996-12-13
申请号：JP15862295
申请日：1995-05-31
申请人： TOSHIBA CORP
发明人： WAKUTSU TAKASHI , NAMEKATA MINORU
IPC分类号： H04J11/00
摘要： PURPOSE: To simplify a demodulator by providing a filter means extracting a signal component of a specific subcarrier and a demodulation means demodulating information to a reception system so as to reduce a sampling frequency of an A/D converter in the orthogonal frequency division multiplex signal communication equipment. CONSTITUTION: The radio communication equipment is made up of an orthogonal frequency division multiplex signal modulator 20 and a demodulator 213. The modulator 20 generates an orthogonal frequency division multiplex signal by arranging orthogonally plural subcarriers modulated by a transmission information series in a frequency region. The demodulator 213 is provided with a filter 222 extracting one or plural subcarriers forming an orthogonal frequency division multiplex signal and demodulates the extracted subcarrier signal. Thus, the entire receiver is made small and the power consumption is reduced.

24. 发明专利

JPH08172422A ANTENNA DIVERSITY RECEIVER 失效
公开(公告)号：JPH08172422A
公开(公告)日：1996-07-02
申请号：JP31537294
申请日：1994-12-19
申请人： TOSHIBA CORP
发明人： NAMEKATA MINORU
IPC分类号： H04L1/04
摘要： PURPOSE: To improve communication quality by performing weighting for maximizing the signal-to-noise ratio of reception signals after eliminating unrequired signal components from the reception signals of respective branches. CONSTITUTION: The transmission signals of different propagation paths are received in antennas 10-12. The reception signals 13 of the antenna 10 are inputted to a transmission path impulse response estimation processing part 19, a transmission path impulse response 118 is calculated by a known code sequence on a receiver side and inputted to a distortion elimination means 112 and weighting and phase control means 115. In the means 112, the distortion component of the signals 13 is eliminated by the response 118 and code judged output 130, inputted to the means 115 as the signals 121, weighting and phase control is performed so as to maximize the signal-to-noise ratio of the reception signals and the signals 324 are inputted to an addition means 327. The series of processings are performed for the respective antennas. Then, the inputs 124-126 from the respective antennas 10-12 are simply added in the means 127, the output 128 is passed through a code judgement means 129, a code judged result 130 is outputted and an information sequence is demodulated in a signal sequence demodulation means 131.

25. 发明专利

JPH0787011A RADIO COMMUNICATION SYSTEM, RADIO EQUIPMENT AND SWITCH 失效
公开(公告)号：JPH0787011A
公开(公告)日：1995-03-31
申请号：JP25220293
申请日：1993-09-14
申请人： TOSHIBA CORP
发明人： MAEDA TADAHIKO , TSURUMI HIROSHI , OBAYASHI SHUICHI , OGURA KOJI , SEKINE SHUICHI , YOSHIDA HIROSHI , IINO KOJI , NAMEKATA MINORU , AMANO TAKASHI , ARAI SATOSHI , MUKAI MANABU , SOEYA MIYUKI , KAYANO HIROYUKI , ISHIBASHI TAKANOBU
IPC分类号： H04B7/10 , H04B7/26
摘要： PURPOSE:To attain efficient radio communication between a base station and a mobile station by selecting the direction of a communication beam in a direction in which a signal with a highest electric field strength is received at a point where a scanning means scanning surroundings intermittently is located. CONSTITUTION:A base station 101 executes scanning by a major beam in every direction in tow-dimension or stereoscopically by changing the directivity of an antenna mechanically or electrically intermittently, in response to the transmission rate concretely such as every 5msec in the case of 200kbps. A mobile station 107 receives the major beam and measures the electric field strength at a received point and informs the result of measurement to the base station 101, which fixes its direction of the major beam in a direction in which a signal with a highest electric field strength is received afterward. Thus, a new radio wave transmission channel Bb is found out corresponding to the reception environment of the mobile station 107 and the direction of the major beam is corrected. Furthermore, when the direction of the antenna is electrically changed, for example, a phased array antenna or the like is used.

26. 发明专利

JPH0695855A INVERSE NUMBER GENERATING CIRCUIT AND DIGITAL SIGNAL PROCESSOR USING THE SAME 失效
公开(公告)号：JPH0695855A
公开(公告)日：1994-04-08
申请号：JP24366992
申请日：1992-09-11
申请人： TOSHIBA CORP
发明人： NAMEKATA MINORU
IPC分类号： G06F7/52 , G06F7/53 , G06F7/535 , G06F7/552
摘要： PURPOSE:To provide an inverse number generating circuit in which an arithmetic processing can be attained by a DSP(digital signal processor) just like a hardware, and the inverse number of a bit precision can be generated. CONSTITUTION:This device is equipped with a storage means 31 which has an (m)X(n) bit area for storing the approximate values A of the inverse numbers 1/P of entire positive numbers P expressed by (n) bits with an (m) bits (m

27. 发明专利

JP2006203911A Apparatus and method for radio communication 有权
标题翻译：无线电通信的装置和方法
公开(公告)号：JP2006203911A
公开(公告)日：2006-08-03
申请号：JP2006014455
申请日：2006-01-23
申请人： Toshiba Corp , 株式会社東芝
发明人： YOSHIDA HIROSHI , SUGANO SHINICHI , TOMIZAWA TAKESHI , NAMEKATA MINORU , TSURUMI HIROSHI , TAMADA YUZO
IPC分类号： H04B1/38 , G06F9/44 , H04B7/26
摘要： PROBLEM TO BE SOLVED: To utilize an application program that has versatility and is independent of a hardware architecture. SOLUTION: By referring to a library comprising a digital signal processing means for performing digital signal processing, for an output of an A/D converting means, to convert a received radio signal into a digital signal and to convert a digital signal to be transmitted into a radio signal and digital signal processing for an input of a D/A converting means and a software group for accomplishing a prescribed radio function, prescribed software is executed on basic software, thereby controlling at least any one of radio signal transmission/reception, A/D conversion, D/A conversion and digital signal processing. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：利用具有多功能性和独立于硬件架构的应用程序。解决方案：通过参考包括用于执行数字信号处理的数字信号处理装置的库，对于A / D转换装置的输出，将接收到的无线电信号转换为数字信号并将数字信号转换为被发送到用于D / A转换装置和用于完成规定的无线电功能的软件组的输入的无线电信号和数字信号处理中，在基本软件上执行规定的软件，从而控制无线电信号发送/ 接收，A / D转换，D / A转换和数字信号处理。版权所有（C）2006，JPO＆NCIPI

28. 发明专利

JP2005341604A Radio communication method, radio communication base station and radio terminal 有权
标题翻译：无线电通信方法，无线电通信基站和无线电终端
公开(公告)号：JP2005341604A
公开(公告)日：2005-12-08
申请号：JP2005179612
申请日：2005-06-20
申请人： Toshiba Corp , 株式会社東芝
发明人： SERIZAWA MUTSUMI , OGURA KOJI , MUKAI MANABU , WAKUTSU TAKASHI , NAMEKATA MINORU , NAKAJIMA NOBUYASU , KAMAGATA EIJI , NOUJIN KATSUYA , TOSHIMITSU KIYOSHI
IPC分类号： H04J1/00 , H04W28/06 , H04Q7/38 , H04Q7/36
摘要： PROBLEM TO BE SOLVED: To transmit a large amount of user information from a base station to a terminal at high speed by making the transmission rate of radio signals wireless to a downlink line high in relative to an uplink line, to sufficiently deal with requests of users and to effectively utilize frequencies. SOLUTION: In a radio communication method, relating to a basic configuration, for performing radio communication between a radio terminal and one or more radio base stations, a first radio transmission band which uses a radio wave of a first frequency band, is used to perform first radio communication between a terminal transmission means provided in the radio terminal and any one or more base station receiving means of the base stations, and a second radio transmission band at higher speed than the first radio transmission band using radio waves of a second frequency band higher than the first frequency band is used to perform second radio communication between the base station transmission means of any one or more radio base stations and a terminal receiving means of the radio terminal. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：通过使无线电信号的传输速率相对于上行链路无线到下行链路线路高，来从基站高速地向终端发送大量的用户信息，以充分地处理具有用户的要求并有效利用频率。解决方案：在无线电通信方法中，关于用于在无线电终端和一个或多个无线电基站之间执行无线电通信的基本配置，使用第一频带的无线电波的第一无线电传输频带是用于在设置在无线终端中的终端传输装置与基站的任何一个或多个基站接收装置之间执行第一无线电通信，并且使用比第一无线电传输频带更高的第二无线电传输频带，使用无线电波使用高于第一频带的第二频带来执行任何一个或多个无线电基站的基站传输装置和无线电终端的终端接收装置之间的第二无线电通信。版权所有（C）2006，JPO＆NCIPI

29. 发明专利

JP2001061186A RADIO SYSTEM, METHOD FOR DOWNLOADING SOFTWARE AND RADIO TERMINAL 失效
公开(公告)号：JP2001061186A
公开(公告)日：2001-03-06
申请号：JP23727699
申请日：1999-08-24
申请人： TOSHIBA CORP
发明人： YOSHIDA HIROSHI , SUGANO SHINICHI , NAMEKATA MINORU , TSURUMI HIROSHI , TAMADA YUZO
IPC分类号： G06F9/445 , G06F13/00 , H04L12/28 , H04W8/24 , H04W48/18 , H04W88/06 , H04Q7/38
摘要： PROBLEM TO BE SOLVED: To provide a radio terminal with high general-purpose performance, having a function of downloading software through a radio channel. SOLUTION: A radio terminal is a terminal, where a software program is installed externally and a CPU and a DSP execute it. When its own terminal goes into initial state (S1), the terminal accesses a broadcast channel (S2) to acquire information relating to a download channel through which a desired software program is downloaded (S4), the radio terminal accesses a prescribed download channel on the basis of the acquired information (S5) to download the desired software program (S7). This software program is for making the radio terminal execute as the terminal of a prescribed radio communication system.

30. 发明专利

JPH11215092A OFDM SIGNAL TRANSMISSION METHOD AND OFDM SIGNAL TRANSMITTER THEREOF 失效
公开(公告)号：JPH11215092A
公开(公告)日：1999-08-06
申请号：JP1062698
申请日：1998-01-22
申请人： TOSHIBA CORP
发明人： NAMEKATA MINORU , SATO KAZUMI
IPC分类号： H04J11/00 , H03M13/27 , H04L25/03 , H04L27/26
摘要： PROBLEM TO BE SOLVED: To enhance transmission average power by controlling the amplitude of an orthogonal frequency division multiple(OFDM) time waveform and to improve throughput by reducing transmission errors. SOLUTION: A sending side selects one of scramble systems #1 to #N by a scramble system selecting part 15 and applied it to a sending data system. a scramble method selection controlling part 14 gives selected scramble information to an identifier adding part 16, and the part 16 adds the information to a sending OFDM signal as an identifier. A receiving side detects the identifier and obtains the original data system by selecting a descramble method, based on detection results and descrambling it. It is possible to change an OFDM time waveform by changing a scramble system.

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