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1. 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。

2. 发明授权

US06563859B1 Receiver and receiving method in multi-carrier spread-spectrum communications 失效
标题翻译：多载波扩频通信中的接收和接收方法
公开(公告)号：US06563859B1
公开(公告)日：2003-05-13
申请号：US09440341
申请日：1999-11-15
申请人： Yasuyuki Oishi , Michiharu Nakamura , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano
发明人： Yasuyuki Oishi , Michiharu Nakamura , Kazuo Nagatani , Hajime Hamada , Yoshihiko Asano
IPC分类号： H04B1707
CPC分类号： H04B1/7115 , H04B1/692 , H04L5/026 , H04L27/2647
摘要： A multi-carrier signal received by an antenna is converted into a signal of an IF band by an RX, and converted into an I signal and a Q signal by an quadrature detector. The I signal and the Q signal as multi-carrier signals are converted into digital signals by an A/D converter, and input to complex filters. The complex filters extract a complex signal having a specified carrier. Then, complex filters shift the center frequency of the extracted complex signal into 0 Hz. The obtained base band signal is input to a finger, and despread and demodulated. The despread and demodulated signal is RAKE synthesized by a synthesis unit, and transmitted to a signal discrimination unit.
摘要翻译：由天线接收的多载波信号通过RX被转换为IF频带的信号，并由正交检波器转换为I信号和Q信号。作为多载波信号的I信号和Q信号由A / D转换器转换成数字信号，并输入到复数滤波器。复数滤波器提取具有指定载波的复信号。然后，复数滤波器将提取的复信号的中心频率移动到0Hz。所获得的基带信号被输入到手指，并被解扩和解调。解扩信号由合成单元RAKE合成，发送到信号鉴别单元。

3. 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。

4. 发明授权

US06853631B1 Code-division multiplex communication transmitting apparatus and receiving apparatus and method thereof 失效
标题翻译：码分复用通信发送装置及其接收装置及方法
公开(公告)号：US06853631B1
公开(公告)日：2005-02-08
申请号：US09415997
申请日：1999-10-12
申请人： Michiharu Nakamura , Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani
发明人： Michiharu Nakamura , Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani
IPC分类号： H04L27/18 , H04B1/707 , H04J13/00 , H04L27/34 , H04B7/216
CPC分类号： H04J13/0003 , H04B1/707 , H04B2201/70701 , H04L27/34
摘要： A phase θI1, . . . , θQ1, . . . uniquely determined for each channel is assigned to a carrier for each channel used when data I1 . . . , Q1, . . . , to be distributed among different channels are modulated. By appropriately modifying the phase of a carrier for each channel, signal points can be located in a narrower region than in a conventional region, and thereby the difference in amplitude between a signal point with a minimum amplitude and a signal point with a maximum amplitude can be reduced. Thus, the amplitude range of a signal to be covered by an amplifier for transmitting a transmission signal is reduced, and thereby an amplifier with a linearity that is not high can be used for the amplifier. Accordingly, even if the number of signal points increase, there is no need to use a large high-power amplifier, and thereby the small power and small size of the apparatus can be realized.
摘要翻译： A相位θ1，。。，thetaQ1，。。。对于每个信道唯一确定的每个信道被分配给用于数据I1时使用的每个信道的载波。。。，Q1。。。，被分配在不同的信道之间进行调制。通过适当地修改每个通道的载波相位，信号点可以位于比常规区域更窄的区域中，从而具有最小振幅的信号点与具有最大振幅的信号点之间的幅度差可以减少因此，用于传输发送信号的放大器要覆盖的信号的振幅范围被减小，因此放大器可以使用线性度不高的放大器。因此，即使信号点的数量增加，也不需要使用大的大功率放大器，从而能够实现装置的小功率和小型化。

5. 发明申请

US20100062733A1 DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD 有权
标题翻译：失真校正控制装置和失真校正控制方法
公开(公告)号：US20100062733A1
公开(公告)日：2010-03-11
申请号：US12567510
申请日：2009-09-25
申请人： Hiroyoshi Ishikawa , Kazuo Nagatani , Hajime Hamada , Nobukazu Fudaba , Yuichi Utsunomiya , Yasuyuki Oishi
发明人： Hiroyoshi Ishikawa , Kazuo Nagatani , Hajime Hamada , Nobukazu Fudaba , Yuichi Utsunomiya , Yasuyuki Oishi
IPC分类号： H04B1/04
CPC分类号： H03F1/32 , H03F1/3241 , H03F1/3247 , H03F3/19
摘要： A distortion correction control apparatus is for compensating for a burst distortion of a transmission amplifier caused by a burst of an input signal of a transmission target. The apparatus includes a generation unit that generates a distortion correction coefficient having reverse characteristics to the foregoing burst distortion; a unit that multiplies the distortion correction coefficient output from the generation unit by the input signal or adds the distortion correction coefficient output from the generation unit to the input signal, upon reception of burst information notifying of switching between presence and absence of the input signal; and an update unit that updates, based on the input signal and a branch signal fed back as an output signal of the transmission amplifier, parameters of functions used for adaptively generating the distortion correction coefficient, and that inputs the updated parameters to the generation unit.
摘要翻译：失真校正控制装置用于补偿由发射目标的输入信号的脉冲串引起的发射放大器的脉冲串失真。该装置包括产生具有与上述突发畸变相反的特性的失真校正系数的生成单元; 一个单元，用于通过输入信号将从生成单元输出的失真校正系数乘以输入信号，或将从生成单元输出的失真校正系数与输入信号相加，或者将通过输入信号存在与不存在切换之间的突发信息相加; 以及更新单元，其基于所述输入信号和作为所述发送放大器的输出信号反馈的分支信号来更新用于自适应地生成所述失真校正系数的功能的参数，并且将更新的参数输入到所述生成单元。

6. 发明授权

US07639755B2 Distortion compensating apparatus 有权
标题翻译：失真补偿装置
公开(公告)号：US07639755B2
公开(公告)日：2009-12-29
申请号：US10951040
申请日：2004-09-22
申请人： Hiroyoshi Ishikawa , Tokuro Kubo , Kazuo Nagatani , Yasuyuki Oishi , Hajime Hamada , Nobukazu Fudaba , Toru Maniwa , Hiroyuki Hayashi
发明人： Hiroyoshi Ishikawa , Tokuro Kubo , Kazuo Nagatani , Yasuyuki Oishi , Hajime Hamada , Nobukazu Fudaba , Toru Maniwa , Hiroyuki Hayashi
IPC分类号： H04K1/02
CPC分类号： H03F1/3247 , H03F2201/3231 , H03F2201/3233
摘要： A distortion compensating apparatus calculates a distortion compensation coefficient in such a manner that a difference signal between a reference signal, which is a transmit signal, and a feedback signal will be diminished, updates an old distortion compensation coefficient by the calculated distortion compensation coefficient and applies distortion compensation to the transmit signal based upon this distortion compensation coefficient. In this apparatus, a phase correcting interval, which is for correcting the phase difference between the reference signal and the feedback signal, and a distortion compensation coefficient updating interval are generated alternately, a correction is applied so as to null the phase difference in the phase correcting interval, and the distortion compensation coefficient is updated in the distortion compensation coefficient updating interval.
摘要翻译：失真补偿装置以这样的方式来计算失真补偿系数，使得作为发送信号的参考信号与反馈信号之间的差信号将被减小，通过计算出的失真补偿系数来更新旧的失真补偿系数并应用基于该失真补偿系数对发送信号进行失真补偿。在该装置中，交替地产生用于校正参考信号和反馈信号之间的相位差的相位校正间隔和失真补偿系数更新间隔，进行校正，以使相位中的相位差无效在失真补偿系数更新间隔中更新失真补偿系数。

7. 发明申请

US20050073361A1 Distortion compensator 有权
标题翻译：失真补偿器
公开(公告)号：US20050073361A1
公开(公告)日：2005-04-07
申请号：US10999747
申请日：2004-11-30
申请人： Hajime Hamada , Hiroyoshi Ishikawa , Kazuo Nagatani , Tokuro Kubo , Nobukazu Fudaba , Yasuyuki Oishi , Toru Maniwa , Hiroyuki Hayashi
发明人： Hajime Hamada , Hiroyoshi Ishikawa , Kazuo Nagatani , Tokuro Kubo , Nobukazu Fudaba , Yasuyuki Oishi , Toru Maniwa , Hiroyuki Hayashi
IPC分类号： H03F1/32 , H04L27/36 , H03F1/26
CPC分类号： H03F1/3294 , H03F1/3247 , H03F1/3288 , H03F2201/3233 , H04L27/368
摘要： The distortion compensator which compensates the nonlinearity of a power amplifier in a radio communication device stops the operation of updating the automatic phase adjustment, automatic delay adjustment, equalizer adjustment, and distortion compensation table when something wrong is detected in the input to a distortion compensation unit such as a reference signal, feedback signal, address of the distortion compensation table, and phase value so that the distortion compensation coefficients may not be improperly updated.
摘要翻译：补偿无线电通信装置中的功率放大器的非线性的失真补偿器在失真补偿单元的输入中检测到错误时停止更新自动相位调整，自动延迟调整，均衡器调整和失真补偿表的操作例如参考信号，反馈信号，失真补偿表的地址和相位值，使得失真补偿系数可能不会被不正确地更新。

8. 发明授权

US06864745B2 Distortion compensation device 失效
标题翻译：失真补偿装置
公开(公告)号：US06864745B2
公开(公告)日：2005-03-08
申请号：US10687391
申请日：2003-10-15
申请人： Takayoshi Ode , Yasuyuki Oishi , Tokuro Kubo , Kazuo Nagatani , Hajime Hamada , Hiroyoshi Ishikawa , Nobukazu Fudaba
发明人： Takayoshi Ode , Yasuyuki Oishi , Tokuro Kubo , Kazuo Nagatani , Hajime Hamada , Hiroyoshi Ishikawa , Nobukazu Fudaba
IPC分类号： H03F1/32 , H04B1/04 , H04B1/62 , H04L27/36 , H03F1/26
CPC分类号： H04L27/368 , H03F1/3241 , H03F1/3247 , H03F2201/3233 , H04B1/62 , H04B2001/0425
摘要： In a distortion compensation device which uses distortion compensation coefficients to subject distortion compensation processing to an input signal and supply the result of the distortion compensation processing to a distorting device, calculates the distortion compensation coefficients based on the input signal before distortion compensation and the feedback signal fed back from the output side of the distorting device, and stores the calculated distortion compensation coefficients in association with the input signal, (1) the feedback signal is AD-converted; (2) the AD-converted output is subjected to fast Fourier transform (FFT) processing; (3) the FFT calculation result is used to calculate the value of either the signal-to-noise ratio SNR, or the adjacent channel leakage power ratio ACLR, or the noise level; (4) the delay time occurring in the distorting device and feedback loop is adjusted such that the difference between the above calculated value at the current time and the above calculated value at the immediately preceding time is either zero, or is equal to or less than a threshold value; and, (5) this adjustment processing is repeated to determine the accurate delay time, and based on this delay time the timing of each of the portions of the distortion compensation device is adjusted.
摘要翻译：在失真补偿装置中，使用失真补偿系数对输入信号进行失真补偿处理，并将失真补偿处理的结果提供给失真装置，基于失真补偿前的输入信号和反馈信号计算失真补偿系数从失真装置的输出侧反馈，并将计算出的失真补偿系数与输入信号相关联，（1）反馈信号进行AD转换; （2）AD转换输出经受快速傅里叶变换（FFT）处理; （3）FFT计算结果用于计算信噪比SNR或相邻信道泄漏功率比ACLR或噪声电平的值; （4）调整在失真装置和反馈回路中发生的延迟时间，使得当前时间的上述计算值与前一时刻的上述计算值之间的差为零或等于或小于阈值; 和（5）重复该调整处理以确定准确的延迟时间，并且基于该延迟时间调整失真补偿装置的每个部分的定时。

9. 发明授权

US06198731B1 Radiocommunication apparatus, and radiocommunication system 失效
标题翻译：无线电通信装置和无线电通信系统
公开(公告)号：US06198731B1
公开(公告)日：2001-03-06
申请号：US08995252
申请日：1997-12-19
申请人： Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani , Hidenobu Fukumasa , Yoshihiko Asano
发明人： Hajime Hamada , Yasuyuki Oishi , Kazuo Nagatani , Hidenobu Fukumasa , Yoshihiko Asano
IPC分类号： H04B7216
CPC分类号： H04B1/707 , H04B7/2628
摘要： There are disclosed a radiocommunication apparatus and a radiocommunication system. There are provided a receiving section capable of receiving a plurality of types of signals which have been spread through use of different spread code information according to a CDMA scheme in a transmitting-side radiocommunication apparatuses; and a spread demodulation section which carries out despread processing for the common signal portions of the plurality of types of signals received by the receiving section through use of a composite spread code formed from a plurality of spread codes. Accordingly, it becomes possible to significantly improve the quality of received signals.
摘要翻译：公开了一种无线电通信装置和无线电通信系统。提供了一种能够在发送侧无线电通信装置中接收根据CDMA方案通过使用不同扩展码信息而扩展的多种类型的信号的接收部分; 以及扩展解调部分，通过使用由多个扩展码形成的复合扩展码，对由接收部分接收的多种类型的信号的公共信号部分进行解扩处理。因此，可以显着提高接收信号的质量。

10. 发明授权

US07551905B2 Distortion compensation apparatus 有权
标题翻译：失真补偿装置
公开(公告)号：US07551905B2
公开(公告)日：2009-06-23
申请号：US10998283
申请日：2004-11-23
申请人： Tokuro Kubo , Kazuo Nagatani , Hajime Hamada , Hiroyoshi Ishikawa , Nobukazu Fudaba , Yasuyuki Oishi , Toru Maniwa , Hiroyuki Hayashi
发明人： Tokuro Kubo , Kazuo Nagatani , Hajime Hamada , Hiroyoshi Ishikawa , Nobukazu Fudaba , Yasuyuki Oishi , Toru Maniwa , Hiroyuki Hayashi
IPC分类号： H01Q11/12
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3294 , H03F2200/447 , H03F2201/3233
摘要： A distortion compensation apparatus of the present invention is used in a transmitter that produces and outputs a second signal from a first signal. This apparatus comprises a delay unit for delaying a feedback signal obtained from by the second signal; and a delay control unit for determining a delay quantity of said delay means so that a timing difference between a reference signal obtained from the first signal and the feedback signal delayed by the delay unit is made small. The delay control unit limits the delay quantity within a predetermined limit value.
摘要翻译：本发明的失真补偿装置用于从第一信号产生并输出第二信号的发送器中。该装置包括用于延迟由第二信号获得的反馈信号的延迟单元; 以及延迟控制单元，用于确定所述延迟装置的延迟量，使得从第一信号获得的参考信号和由延迟单元延迟的反馈信号之间的定时差变小。延迟控制单元将延迟量限制在预定极限值内。

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