专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US6167037A Signal transmitting method, transmitter, receiver, and spread-spectrum code synchronizing method for mobile communication system 失效
标题翻译：用于移动通信系统的信号发射方法，发射机，接收机和扩频码同步方法
公开(公告)号：US6167037A
公开(公告)日：2000-12-26
申请号：US952081
申请日：1997-11-03
申请人： Kenichi Higuchi , Mamoru Sawahashi , Fumiyuki Adachi , Koji Ohno , Akihiro Higashi
发明人： Kenichi Higuchi , Mamoru Sawahashi , Fumiyuki Adachi , Koji Ohno , Akihiro Higashi
IPC分类号： H04B1/707 , H04B1/7075 , H04B7/26 , H04W48/16 , H04W56/00 , H04B7/216
CPC分类号： H04B1/70756 , H04B1/70755 , H04B1/708 , H04B1/7083 , H04B2201/70702 , H04J13/16 , H04J2013/0037
摘要： Achieving high speed spreading code synchronization of a forward link control channel. A control channel information signal and traffic channel information signals are each spread by different first spreading codes which are fed from a first spreading code (short code) generator (11), and which have a period equal to the period of an information symbol. Subsequently, only the control channel information signal is spread by a third spreading code which is fed from a third spreading code (long code masked portion complex conjugate code) generator (12), and which has a form of complex conjugate of a long code (second spreading code) used for spreading in common. The signals of the entire channels are summed up by an adder (13) at appropriate timings, and the resultant sum is spread by the second spreading code fed from a second spreading code generator (14), thereby being output as a spread modulation signal.
摘要翻译： PCT No.PCT / JP97 / 00657 Sec。 371日期：1997年11月3日 102（e）日期1997年11月3日PCT 1997年3月4日PCT公布。公开号WO97 / 33400 PCT 日期1997年9月12日正向链路控制通道的高速扩频码同步。控制信道信息信号和业务信道信息信号各自由从第一扩展码（短码）发生器（11）馈送的不同的第一扩展码进行扩展，并且其周期等于信息符号的周期。随后，只有控制信道信息信号被从第三扩展码（长码屏蔽部分复共轭码）发生器（12）馈送的第三扩展码扩展，并且具有长码（第二扩展码）用于共同传播。整个信道的信号在适当的定时由加法器（13）求和，并且所得到的和由第二扩展码发生器（14）馈送的第二扩展码扩展，从而作为扩展调制信号被输出。

2. 发明授权

US5692015A Coherent detector and a coherent detection method for a digital communication receiver 失效
标题翻译：相干检测器和数字通信接收机的相干检测方法
公开(公告)号：US5692015A
公开(公告)日：1997-11-25
申请号：US553464
申请日：1995-11-28
申请人： Akihiro Higashi , Fumiyuki Adachi , Koji Ohno , Mamoru Sawahashi
发明人： Akihiro Higashi , Fumiyuki Adachi , Koji Ohno , Mamoru Sawahashi
IPC分类号： H04L7/08 , H04L25/02 , H03D1/00 , H04L27/06
CPC分类号： H04L25/0236 , H04L25/0212 , H04L25/0232 , H04L7/08
摘要： A coherent detection method including a step of estimating a transfer function of a propagation path using pseudo-pilot signals which consist of some information symbols adjacent to pilot signals. The information symbols in the pseudo-pilot signals are assumed to be known. The method includes the steps of estimating the transfer functions using the pilot signals, carrying out interpolation coherent detection of the information symbols using the estimated transfer functions, storing the detection results as the pseudo-pilot signals, reestimating the transfer functions associated with the information symbols corresponding to the pseudo-pilot signals by using the pseudo-pilot signals and the corresponding received signal under the assumption that the pseudo-pilot signals have a known correct pattern, and carrying out the interpolation coherent detection of the individual information symbols by using the transfer functions obtained by the reestimation. This makes it possible to estimate the transfer function at high accuracy with a small number of symbols per pilot signal, thereby improving the detection characteristics.
摘要翻译： PCT No.PCT / JP95 / 01229 Sec。 371日期：1995年11月28日 102（e）1995年11月28日日期PCT 1995年6月21日PCT PCT。公开号WO95 / 35615 日期1995年12月28日一种相干检测方法，包括使用由与导频信号相邻的一些信息符号组成的伪导频信号来估计传播路径的传递函数的步骤。伪导频信号中的信息符号被认为是已知的。该方法包括以下步骤：使用导频信号估计传递函数，使用估计的传递函数执行信息符号的内插相关检测，将检测结果存储为伪导频信号，重新估计与信息符号相关联的传递函数在伪导频信号具有已知正确模式的假设下，通过使用伪导频信号和相应的接收信号对应于伪导频信号，并且通过使用传输来执行个体信息符号的内插相关检测通过重新获得的功能。这使得可以以每个导频信号的少量符号高精度地估计传递函数，从而提高检测特性。

3. 发明授权

US5652765A Receiver and repeater for spread spectrum communications 失效
标题翻译：接收机和中继器用于扩频通信
公开(公告)号：US5652765A
公开(公告)日：1997-07-29
申请号：US411645
申请日：1995-05-22
申请人： Fumiyuki Adachi , Mamoru Sawahashi , Akihiro Higashi , Koji Ohno , Tomohiro Dohi
发明人： Fumiyuki Adachi , Mamoru Sawahashi , Akihiro Higashi , Koji Ohno , Tomohiro Dohi
IPC分类号： H04B1/707 , H04B7/06 , H04B7/08 , H04B3/36 , H04B7/17 , H04B17/02 , H04L25/20
CPC分类号： H04B7/0894 , H04B1/712 , H04B7/0671
摘要： A repeater improving the effect of a RAKE reception. A received signal from a base station parallelly passes a first path including a first delay circuit and a second path including no delay circuit, and is transmitted to a mobile station. A received signal from the mobile station parallelly passes a third path including a second delay circuit and a fourth path including no delay circuit, and is transmitted to the base station. The delay time of the delay circuits are set at one chip interval or more of a spreading code. This forcedly produces multipath waves which are resolvable by a RAKE receiver. The RAKE receiver estimates amplitudes of desired wave components for individual delayed waves, performs weighting of the respective delayed wave components from detectors by using the estimated amplitudes, and makes symbol decision in terms of the combined weighted signal.
摘要翻译： PCT No.PCT / JP94 / 01283第 371日期：1995年5月22日 102（e）日期1995年5月22日PCT 1994年8月4日PCT PCT。第WO95 / 05037号公报日期1995年2月16日中继器改善RAKE接收的效果。来自基站的接收信号并行地通过包括第一延迟电路和不包括延迟电路的第二路径的第一路径，并被发送到移动站。来自移动站的接收信号并行地通过包括第二延迟电路的第三路径和不包括延迟电路的第四路径，并且被发送到基站。延迟电路的延迟时间设定为扩展码的一个码片间隔或更多个码片间隔。这强制产生可由RAKE接收机解析的多径波。 RAKE接收机估计各个延迟波的期望波分量的振幅，通过使用估计的幅度对来自检测器的各个延迟波分量进行加权，并根据组合的加权信号进行符号判定。

4. 发明授权

US5940433A Acquisition method and system of spreading code 失效
标题翻译：扩展码的采集方法和系统
公开(公告)号：US5940433A
公开(公告)日：1999-08-17
申请号：US793052
申请日：1997-02-12
申请人： Mamoru Sawahashi , Akihiro Higashi , Kenichi Higuchi
发明人： Mamoru Sawahashi , Akihiro Higashi , Kenichi Higuchi
IPC分类号： H04B1/707 , H04K1/00
CPC分类号： H04B1/70775 , H04B1/7075 , H04B1/70755 , H04B2201/70701
摘要： In a mobile communication system using spread spectrum, performing respective multiplications of an I and Q channel signals by a spreading code replica, integration over one spreading code period, and square-law detection of the integrated signals to remove data modulation components and residual carrier frequency components. The square-law detected signals are added to obtain signal power over one spreading code period while updating the clock phase of a digital control clock generator. The information of power is stored in a memory in an acquisition mode controller, and the clock phase of the digital control clock generator 30 is fixed at the spreading code replica phase at which a maximum correlation detection power over one spreading code period is obtained. Subsequently, a confirmation mode is started for confirming the spreading code acquisition phase. By thus providing the confirmation mode of the spreading code acquisition, the acquisition can be established in a short time with a low error acquisition probability, thereby enabling a tracking mode to be started soon.
摘要翻译： PCT No.PCT / JP96 / 01589 Sec。 371日期1997年2月12日 102（e）日期1997年2月12日PCT提交1996年6月12日PCT公布。公开号WO96 / 42147 PCT。日期：1996年12月27日在使用扩展频谱的移动通信系统中，通过扩展码副本执行I和Q信道信号的相乘，在一个扩展码周期上进行积分，并且对积分信号进行平方律检测以去除数据调制组件和残余载波频率分量。增加平方律检测信号以在更新数字控制时钟发生器的时钟相位的同时在一个扩展码周期上获得信号功率。功率信息存储在采集模式控制器中的存储器中，并且数字控制时钟发生器30的时钟相位固定在扩展码复制相位，在该扩展码复制相位获得一个扩展码周期的最大相关检测功率。随后，开始确认扩展码获取阶段的确认模式。通过这样提供扩展码获取的确认模式，可以在低错误获取概率的短时间内建立获取，从而能够很快开始跟踪模式。

5. 发明授权

US5896374A Variable rate transmission method, transmitter and receiver using the same 失效
标题翻译：变速率传输方式，发射机和接收机使用相同
公开(公告)号：US5896374A
公开(公告)日：1999-04-20
申请号：US732413
申请日：1996-10-22
申请人： Yukihiko Okumura , Fumiyuki Adachi , Koji Ohno , Akihiro Higashi
发明人： Yukihiko Okumura , Fumiyuki Adachi , Koji Ohno , Akihiro Higashi
IPC分类号： H04B1/707 , H04B7/26 , H04J3/14 , H04J3/16 , H04J13/00 , H04L1/00 , H04L1/08 , H04L7/04 , H04B7/216 , H04J13/02
CPC分类号： H04L1/0046 , H04B1/707 , H04B7/2628 , H04J3/14 , H04J3/1682 , H04L1/0002 , H04L1/0007 , H04L1/0013 , H04L1/0038 , H04L1/0039 , H04L1/0061 , H04L1/0063 , H04L1/0071 , H04L1/0079 , H04L1/0086 , H04L1/08 , H04L7/048 , H04B2201/70703 , H04B2201/70705 , H04L1/0009 , H04L1/0025 , H04L1/0032 , H04L1/0059 , H04L2001/0098 , Y02B60/31
摘要： A variable rate transmission method that can vary the transmission rate of data. A transmitting side supplies a transmitted data sequence to an error detecting encoder 105 and a frame memory 103. The frame memory 103 stores data of a variable length to be transmitted in one frame. The error detecting encoder 105 calculates an error detecting code (such as CRC code) for each frame of the transmitted data. A multiplexer 104 adds the calculated error detecting code ahead of the transmitted data to place it at the initial position of the frame, and sequentially outputs the data sequence frame by frame. A receiving side calculates an error detecting code of the data in each transmitted frame in the same manner as the transmitting side, and compares the calculated error detecting code with the error detecting code at the initial position of the frame. The end bit of the frame data is decided as a position at which the two error detecting codes coincide. This makes it possible to transmit variable length data without informing the receiving side of the data length in each frame. This is equivalent that the transmission rate can be varied freely.
摘要翻译： PCT No.PCT / JP96 / 00419 Sec。 371日期1996年10月22日第 102（e）日期1996年10月22日PCT提交1996年2月23日PCT公布。公开号WO96 / 26582 日期1996年8月29日可变速率传输方法可以改变数据传输速率。发送侧将发送的数据序列提供给错误检测编码器105和帧存储器103.帧存储器103将要发送的可变长度的数据存储在一帧中。错误检测编码器105针对发送数据的每一帧计算错误检测码（例如CRC码）。复用器104将所发送的数据之前的计算出的错误检测码相加，将其置于帧的初始位置，并逐帧地依次输出数据序列。接收侧以与发送侧相同的方式计算每个发送帧中的数据的错误检测码，并将计算出的错误检测码与帧的初始位置处的错误检测码进行比较。帧数据的结束位被确定为两个错误检测码一致的位置。这使得可以在不向每个帧中的接收方通知数据长度的情况下发送可变长度数据。这相当于传输速率可以自由变化。

6. 发明授权

US07095780B2 Base station apparatus of mobile communication system 有权
标题翻译：移动通信系统基站装置
公开(公告)号：US07095780B2
公开(公告)日：2006-08-22
申请号：US10673685
申请日：2003-09-29
申请人： Takehiro Nakamura , Junichiro Hagiwara , Etsuhiro Nakano , Koji Ohno , Seizo Onoe , Akihiro Higashi , Motoshi Tamura , Masatomo Nakano , Hiroshi Kawakami , Hiroki Morikawa
发明人： Takehiro Nakamura , Junichiro Hagiwara , Etsuhiro Nakano , Koji Ohno , Seizo Onoe , Akihiro Higashi , Motoshi Tamura , Masatomo Nakano , Hiroshi Kawakami , Hiroki Morikawa
IPC分类号： H04B1/707 , H04Q7/20
CPC分类号： H04W88/08 , H04B7/2618 , H04B7/2628 , H04B2201/70701 , H04B2201/70703 , H04J13/00 , H04J13/0022 , H04J13/0029 , H04J13/0077 , H04J13/10 , H04J13/16 , H04W52/08 , H04W52/12 , H04W52/16 , H04W52/24 , H04W52/241 , H04W52/248 , H04W52/322 , H04W52/325 , H04W52/40 , H04W52/50 , H04W52/56 , H04W52/60 , H04W92/10 , H04W92/12
摘要： A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
摘要翻译：一种基站，包括用于放大与移动台交换的CDMA信号的发射和接收放大器; 连接到发射和接收放大器的无线电台，用于对经历基带扩频的发送信号进行D / A转换，随后进行正交调制，并进行接收信号的准相干检测，然后进行A / D转换 ; 与无线电台连接的基带信号处理器，用于对发射信号和接收信号进行基带信号处理; 与基带信号处理器连接的传输接口，用于实现与外部信道的接口; 以及用于执行无线电信道的管理和无线电信道的建立和释放的控制的基站控制器。基站通过将逻辑信道映射到物理信道中与外部信道进行通信。 CDMA信号使用短码和长码进行传播。

7. 发明授权

US6026115A Rake receiver 失效
标题翻译：耙式接收机
公开(公告)号：US6026115A
公开(公告)日：2000-02-15
申请号：US912569
申请日：1997-08-18
申请人： Akihiro Higashi , Koji Ohno , Seizou Onoe
发明人： Akihiro Higashi , Koji Ohno , Seizou Onoe
IPC分类号： H04B1/707 , H04B15/00
CPC分类号： H04B1/7115
摘要： A RAKE receiver which is employed in a direct sequence spread spectrum communication system, and which can effectively receive multipath signals. A path searcher measures the amplitude of each path, selects N paths with larger amplitudes in descending order of magnitude, where N is the number of despreaders, and assigns the despreaders to the selected paths to despread the signals of the paths. This assignment of the despreaders to the paths is carried out such that a path with a large amplitude and a path with a small amplitude are assigned to adjacent despreaders and are input to the same pre-detection combiner. The outputs of the despreaders are combined by the pre-detection combiners, and detected by detectors whose outputs are RAKE combined by a post-detection combiner.
摘要翻译：一种RAKE接收机，用于直接序列扩频通信系统，可以有效地接收多径信号。路径搜索器测量每条路径的幅度，选择具有较大幅度的N个路径，其幅度按降序排列，其中N是去扩展器的数量，并将解扩展器分配给所选路径以对路径的信号进行解扩。解扩器到路径的这种分配被执行，使得具有大幅度的路径和具有小幅度的路径被分配给相邻的解扩器，并被输入到相同的预检测组合器。解扩器的输出由预检测组合器组合，并由检测器组合器进行RAKE组合的检测器检测。

8. 发明授权

US5596516A Code sequence generator 失效
标题翻译：码序发生器
公开(公告)号：US5596516A
公开(公告)日：1997-01-21
申请号：US428389
申请日：1995-04-25
申请人： Akihiro Higashi , Koji Ohno , Narumi Umeda
发明人： Akihiro Higashi , Koji Ohno , Narumi Umeda
IPC分类号： G06F7/58 , H04J11/00 , H04L9/22 , G06F1/02
CPC分类号： H04J13/10 , H04L9/0662 , H04L2209/125
摘要： A code sequence generator having a register for holding n-bit code, and a calculation circuit for performing matrix calculation on the content of the register, and sequentially generating a code sequence by feeding back the calculation results to the register. The matrix which is set in the calculation circuit is changed by selectively reading a matrix from a memory circuit that stores precalculated matrices. This makes it possible to set a desired register state in a short time even if the desired code sequence is very long, and to generate any code sequences without changing the rate of a clock signal.
摘要翻译：具有用于保持n位代码的寄存器的代码序列发生器，以及用于对寄存器的内容执行矩阵运算的计算电路，并且通过将计算结果反馈到寄存器来顺序生成代码序列。通过从存储预先计算的矩阵的存储器电路中选择性地读取矩阵来改变在计算电路中设置的矩阵。这使得即使期望的代码序列非常长，也可以在短时间内设置期望的寄存器状态，并且可以在不改变时钟信号的速率的情况下生成任何代码序列。

9. 发明授权

US07826861B2 Base station apparatus of mobile communication system 有权
标题翻译：移动通信系统基站装置
公开(公告)号：US07826861B2
公开(公告)日：2010-11-02
申请号：US10674003
申请日：2003-09-29
申请人： Takehiro Nakamura , Junichiro Hagiwara , Etsuhiro Nakano , Koji Ohno , Seizo Onoe , Akihiro Higashi , Motoshi Tamura , Masatomo Nakano , Hiroshi Kawakami , Hiroki Morikawa
发明人： Takehiro Nakamura , Junichiro Hagiwara , Etsuhiro Nakano , Koji Ohno , Seizo Onoe , Akihiro Higashi , Motoshi Tamura , Masatomo Nakano , Hiroshi Kawakami , Hiroki Morikawa
IPC分类号： H04B7/00
CPC分类号： H04W88/08 , H04B7/2618 , H04B7/2628 , H04B2201/70701 , H04B2201/70703 , H04J13/00 , H04J13/0022 , H04J13/0029 , H04J13/0077 , H04J13/10 , H04J13/16 , H04W52/08 , H04W52/12 , H04W52/16 , H04W52/24 , H04W52/241 , H04W52/248 , H04W52/322 , H04W52/325 , H04W52/40 , H04W52/50 , H04W52/56 , H04W52/60 , H04W92/10 , H04W92/12
摘要： A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
摘要翻译：一种基站，包括用于放大与移动台交换的CDMA信号的发射和接收放大器; 连接到发射和接收放大器的无线电台，用于对经历基带扩频的发送信号进行D / A转换，随后进行正交调制，并进行接收信号的准相干检测，然后进行A / D转换 ; 与无线电台连接的基带信号处理器，用于对发射信号和接收信号进行基带信号处理; 与基带信号处理器连接的传输接口，用于实现与外部信道的接口; 以及用于执行无线电信道的管理和无线电信道的建立和释放的控制的基站控制器。基站通过将逻辑信道映射到物理信道中与外部信道进行通信。 CDMA信号使用短码和长码进行传播。

10. 发明申请

US20060251151A1 BASE STATION APPARATUS OF MOBILE COMMUNICATION SYSTEM 有权
标题翻译：移动通信系统的基站设备
公开(公告)号：US20060251151A1
公开(公告)日：2006-11-09
申请号：US11456827
申请日：2006-07-11
申请人： Takehiro Nakamura , Junichiro Hagiwara , Etsuhiro Nakano , Koji Ohno , Seizo Onoe , Akihiro Higashi , Motoshi Tamura , Masatomo Nakano , Hiroshi Kawakami , Hiroki Morikawa
发明人： Takehiro Nakamura , Junichiro Hagiwara , Etsuhiro Nakano , Koji Ohno , Seizo Onoe , Akihiro Higashi , Motoshi Tamura , Masatomo Nakano , Hiroshi Kawakami , Hiroki Morikawa
IPC分类号： H04B1/00
CPC分类号： H04W88/08 , H04B7/2618 , H04B7/2628 , H04B2201/70701 , H04B2201/70703 , H04J13/00 , H04J13/0022 , H04J13/0029 , H04J13/0077 , H04J13/10 , H04J13/16 , H04W52/08 , H04W52/12 , H04W52/16 , H04W52/24 , H04W52/241 , H04W52/248 , H04W52/322 , H04W52/325 , H04W52/40 , H04W52/50 , H04W52/56 , H04W52/60 , H04W92/10 , H04W92/12
摘要： A base station including a transmitting and receiving amplifier for amplifying CDMA signals exchanged with a mobile station; a radio stage connected to the transmitting and receiving amplifier for carrying out D/A conversion of a transmitted signal that undergoes baseband spreading, followed by quadrature modulation, and for carrying out quasi-coherent detection of a received signal, followed by A/D conversion; a baseband signal processor connected with the radio stage for carrying out baseband signal processing of the transmitted signal and the received signal; a transmission interface connected with the baseband signal processor for implementing interface with external channels; and a base station controller for carrying out control such as management of radio channels and establishment and release of the radio channels. The base station communicates with the external channels by mapping logical channels into physical channels. The CDMA signals are spread using a short code and a long code.
摘要翻译：一种基站，包括用于放大与移动台交换的CDMA信号的发射和接收放大器; 连接到发射和接收放大器的无线电台，用于对经历基带扩频的发送信号进行D / A转换，随后进行正交调制，并进行接收信号的准相干检测，然后进行A / D转换 ; 与无线电台连接的基带信号处理器，用于对发射信号和接收信号进行基带信号处理; 与基带信号处理器连接的传输接口，用于实现与外部信道的接口; 以及用于执行无线电信道的管理和无线电信道的建立和释放的控制的基站控制器。基站通过将逻辑信道映射到物理信道中与外部信道进行通信。 CDMA信号使用短码和长码进行传播。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式