公开(公告)号：US07142587B2

公开(公告)日：2006-11-28

申请号：US09875151

申请日：2001-06-07

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04B1/707

CPC分类号： H04B1/7113 ,  H04B1/709 ,  H04B1/7117

摘要： A received path timing detecting circuit in a receiver used in a DS-CDMA system, which can detect received path timing in multi path propagation channels even under surroundings in which noise and interference electric power are very large, is provided. A received path timing detecting circuit calculates cross correlation coefficients {RN,M} between a received signal and a reference signal in a predetermined cycle, a differential detector obtains real parts of products of complex conjugate numbers of respective elements of the cross correlation coefficients {RN−1,M} calculated at the N−1st cycle (N is an integer) and respective elements of the cross correlation coefficients {RN,M} calculated at the Nth cycle, and outputs the real parts as differential detection cross correlation coefficients {PN,M}, an averager for averaging the differential detection cross correlation coefficients outputted from the differential detector by a predetermined time, and a peak detector that detects one or plural peak values from the averaged cross correlation coefficients {PAN,M} and outputs the detected one or plural peak values as the received path timing.

摘要翻译： 提供了一种在DS-CDMA系统中使用的接收机中的接收路径定时检测电路，即使在噪声和干扰电力非常大的环境下也可以检测多径传播信道中的接收路径定时。 接收路径定时检测电路以预定周期计算接收信号和参考信号之间的相关系数{R N N，M N}，差分检测器获得各自的复共轭数的乘积的实部， 在N-1st周期（N为整数）上计算的互相关系数{R N-1，M N}的元素和互相关系数{R N，M 在第N个周期计算，并且将实部作为差分检测互相关系数{P N N，M N}输出，用于对从差分输出的差分检测互相关系数进行平均 检测器预定时间，以及峰值检测器，其根据平均相关系数{PA N，M N}检测一个或多个峰值，并将检测到的一个或多个峰值输出作为接收路径定时 。

公开(公告)号：US20050083875A1

公开(公告)日：2005-04-21

申请号：US10970276

申请日：2004-10-22

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04J13/00 ,  H04B1/707 ,  H04B7/26 ,  H04W4/00 ,  H04W16/28 ,  H04W48/08 ,  H04J11/00

CPC分类号： H04B7/2637

摘要： A cellular system using a code division multiple access (CDMA) scheme includes N (N is a positive integer) pilot channels and M (M is a positive integer) data channels. The pilot channels are used transmitting reference signals whose transmission signals are known in advance. The data channels are used for transmitting information. Each of the M data channels is made to correspond to one or a plurality of said N pilot channels.

摘要翻译： 使用码分多址（CDMA）方案的蜂窝系统包括N（N是正整数）导频信道，M（M是正整数）数据信道。 导频信道用于传输信号是预先已知的参考信号。 数据通道用于传输信息。 使M个数据信道中的每一个对应于一个或多个所述N个导频信道。

公开(公告)号：US06827624B2

公开(公告)日：2004-12-07

申请号：US10196032

申请日：2002-07-15

申请人： Hideo Kurokawa ,  Tetsuya Shiratori ,  Toshifumi Sato ,  Masahiro Deguchi ,  Makoto Kitabatake

发明人： Hideo Kurokawa ,  Tetsuya Shiratori ,  Toshifumi Sato ,  Masahiro Deguchi ,  Makoto Kitabatake

IPC分类号： H01J900

CPC分类号： H01J1/316 ,  H01J2329/00

摘要： The first basic structure of the electron emission element of the present invention includes at least two electrodes disposed in a horizontal direction at a predetermined interval, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed between the electrodes. On the other hand, the second basic structure of the electron emission element of the present invention includes at least two electrodes disposed at a predetermined interval, a conductive layer disposed between the electrodes so as to be electrically connected thereto, and a plurality of electron emission portions made of a particle or an aggregate of the particles dispersively disposed on the surface of the conductive layer between the electrodes. According to these structures, an electron emission element with high stability can be obtained, in which emissions can be emitted efficiently and uniformly even in the absence of a bias voltage (electric field) from outside in an output (emission) direction of the electrons, by utilizing a transverse electric field generated between the electrodes disposed in a horizontal direction at a predetermined interval or an in-plane electric current flowing through the conductive layer disposed between the electrodes.

摘要翻译： 本发明的电子发射元件的第一基本结构包括以预定间隔沿水​​平方向布置的至少两个电极和由分散地设置在电极之间的颗粒或聚集体的多个电子发射部分 。 另一方面，本发明的电子发射元件的第二基本结构包括以预定间隔设置的至少两个电极，设置在电极之间以与其电连接的导电层和多个电子发射 分散地设置在电极之间的导电层的表面上的由颗粒或聚集体构成的部分。 根据这些结构，可以获得具有高稳定性的电子发射元件，其中即使在电子的输出（发射）方向上没有来自外部的偏置电压（电场）的情况下也可以有效且均匀地发射， 通过利用在预定间隔沿水​​平方向布置的电极之间产生的横向电场或流过设置在电极之间的导电层的面内电流。

公开(公告)号：US06778591B2

公开(公告)日：2004-08-17

申请号：US09840287

申请日：2001-04-23

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04K100

CPC分类号： H04B1/708 ,  H04B1/70754 ,  H04B1/70757 ,  H04B1/7113 ,  H04B1/7117 ,  H04B2201/70707

摘要： A path search circuit wherein a received signal is divided with a plurality of FFT windows to reduce arithmetic operation processing for cross-correlation coefficients is disclosed. An interleave unit divides received signal rxd into two rxd1, rxd2 at one-chip intervals, and the two sequences are picked out with overlapped FFT windows and FFT is performed for the picked out sequences by two FFT units. A cross power spectrum calculating unit determines cross power spectra between the received signal after the FFT and a reference signal stored in a reference signal storage unit. An output of the cross power spectrum calculating unit is averaged for each FFT window by an averaging unit, and IFFT is performed for the averaged cross power spectra by an IFFT unit. The two resulting cross-correlation coefficients are rearranged in order of time by a deinterleave unit and interpolated to an accuracy necessary for detection of a path timing by an interpolation unit.

摘要翻译： 公开了一种路径搜索电路，其中接收信号被分割成多个FFT窗口以减少互相关系数的运算处理。 交织单元将接收信号rxd以单码间隔分成两个rxd1，rxd2，并且用重叠的FFT窗口挑出两个序列，并通过两个FFT单元对所选择的序列执行FFT。 交叉功率谱计算单元确定FFT之后的接收信号与存储在参考信号存储单元中的参考信号之间的交叉功率谱。 通过平均化单位对每个FFT窗口对交叉功率谱计算单元的输出进行平均，并且通过IFFT单元对平均交叉功率谱执行IFFT。 所产生的两个互相关系数由解交织单元按时间顺序重新排列，并被内插到由内插单元检测路径定时所需的准确度。

公开(公告)号：US5982763A

公开(公告)日：1999-11-09

申请号：US892497

申请日：1997-07-14

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04B1/707 ,  H04B1/7073 ,  H04B1/709 ,  H04B7/26 ,  H04W4/00 ,  H04W56/00 ,  H04W88/08 ,  H04B15/00 ,  H04L27/14

CPC分类号： H04B1/70775 ,  H04B1/70757 ,  H04B1/709 ,  H04B2201/70701

摘要： A reception timing detection circuit of a CDMA receiver comprises an A/D converter 101 for obtaining a digital reception signal S, a correlator 102 for obtaining a cross-correlation between the digital reception signal S and a known signal series periodically within a predetermined lag, an interpolation filter 103 for re-sampling the signal R output from the correlator 102 at a frequency higher than a sampling frequency for the A/D converter 101, a power calculation section 104 for obtaining the re-sampled cross-correlation signal power P, an averaging section 105 for averaging the cross-correlation signal power P over a plurality of cycles, and a peak detection section 106 for obtaining a peak Popt of the averaged cross-correlation signal power P and determining an optimum reception timing .tau. opt.

摘要翻译： CDMA接收机的接收定时检测电路包括用于获得数字接收信号S的A / D转换器101，用于在预定滞后期间周期性获得数字接收信号S与已知信号序列之间的互相关的相关器102， 内插滤波器103，用于以比A / D转换器101的采样频率高的频率对相关器102输出的信号R进行再采样;功率计算部分104，用于获得再采样的互相关信号功率P， 平均部分105，用于对多个周期的互相关信号功率P进行平均;以及峰值检测部分106，用于获得平均互相关信号功率P的峰值Popt，并确定最佳接收定时τopt。

公开(公告)号：US5809058A

公开(公告)日：1998-09-15

申请号：US357288

申请日：1994-12-13

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04J13/00 ,  H04B1/707 ,  H04L29/02

CPC分类号： H04B1/7097

摘要： A CDMA signal receiving apparatus for a base station includes a spread-spectrum demodulation section which has a plurality of channel-signal processing sections and a common-signal processing section. Each of the channel-signal processing section receives a digital spread-spectrum modulated base band signal and performs a reception processing of a channel signal by means of spread-spectrum demodulation using common data, wherein the channel signal refers to a digital spread-spectrum demodulated base band signal destined to the channel of concern. The common-signal processing section computes, from the digital spread-spectrum modulated base band signal, values required in common to all of the channel-signal processing sections for the spread-spectrum demodulation to be processed in each of the channel-signal processing sections, and outputs the values as the common data.

摘要翻译： 用于基站的CDMA信号接收装置包括具有多个信道信号处理部分和公共信号处理部分的扩频解调部分。 每个信道信号处理部分接收数字扩频调制基带信号，并且通过使用公共数据的扩频解调来执行信道信号的接收处理，其中信道信号是指数字扩频解调的 基带信号注定到关注的频道。 公共信号处理部分从数字扩频调制基带信号中计算要在每个信道信号处理部分中处理的扩频解调的所有信道信号处理部分共同所需的值 ，并将这些值作为公共数据输出。

公开(公告)号：US5745858A

公开(公告)日：1998-04-28

申请号：US337835

申请日：1994-11-08

申请人： Toshifumi Sato ,  Yukitsuna Furuya

发明人： Toshifumi Sato ,  Yukitsuna Furuya

IPC分类号： H01Q3/26 ,  H01Q25/00 ,  H04B1/40 ,  H04B7/08 ,  H04B7/26 ,  H04W16/24 ,  H04W16/28 ,  H04Q7/30

CPC分类号： H01Q25/00 ,  H01Q3/2605 ,  H04W16/24

摘要： In a base station transmitter/receiver of a cellular system, a plurality of antennas are oriented in each sector and radiate radio transmission signals and receive radio reception signals to produce received signals. A signal processing circuit is connected to the antennas to process the received signals into output reception signal and to process input transmission signal into the radio transmission signals in response to the received signal. Thus, the signal processing circuit serves to vary the directivities of the antennas in each sector and to thereby control a composite directivity formed by the varied directivities.

摘要翻译： 在蜂窝系统的基站发射机/接收机中，在每个扇区中定向多个天线，并且辐射无线电传输信号并接收无线电接收信号以产生接收信号。 信号处理电路连接到天线，以将接收到的信号处理成输出接收信号，并且响应于接收到的信号将输入传输信号处理成无线电传输信号。 因此，信号处理电路用于改变每个扇区中天线的方向性，从而控制由不同方向性形成的复合方向性。

公开(公告)号：US5511068A

公开(公告)日：1996-04-23

申请号：US349885

申请日：1994-12-06

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04B1/707 ,  H04B1/7097 ,  H04B7/26 ,  H04W72/04 ,  H04W76/02 ,  H04J13/00

CPC分类号： H04J13/00 ,  H04B7/2618

摘要： In a communication system from a mobile station to a base station, a transmitter of the mobile station subjects a sequence of transmission signals to both of time division multiple access (TDMA) and code division multiple access (CDMA) to produce a radio output signal located in a time slot of a frame. The radio output signal obtained by the TDMA and CDMA is filtered or inversely spread to remove interference and noise from the radio output signal by the use of an adaptive filter which has taps controlled by an adaptive controller.

摘要翻译： 在从移动台到基站的通信系统中，移动台的发射机对时分多址（TDMA）和码分多址（CDMA）两者进行一系列传输信号，以产生位于 在帧的时隙中。 通过TDMA和CDMA获得的无线电输出信号被滤波或反向扩展，以通过使用具有由自适应控制器控制的抽头的自适应滤波器从无线电输出信号中去除干扰和噪声。

公开(公告)号：US5499021A

公开(公告)日：1996-03-12

申请号：US320596

申请日：1994-10-07

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： G08B5/22 ,  H04W88/02 ,  H04Q7/14

CPC分类号： H04W88/023 ,  G08B5/224 ,  G08B5/229

摘要： A paging receiver with a display function allows a conventional message to be displayed and a receiver control signal to be sent together in a single message format. A first and a second predetermined character are detected in a received message. A message occurring between the first and second characters is extracted as a receiver control signal and is not displayed on a display.

摘要翻译： 具有显示功能的寻呼接收机允许显示常规消息并且以单个消息格式一起发送接收机控制信号。 在接收到的消息中检测到第一和第二预定字符。 在第一和第二字符之间发生的消息被提取为接收器控制信号，并且不显示在显示器上。

公开(公告)号：US5343502A

公开(公告)日：1994-08-30

申请号：US982950

申请日：1992-11-30

申请人： Toshifumi Sato

发明人： Toshifumi Sato

IPC分类号： H04L27/22 ,  H04L7/02 ,  H04L7/027

CPC分类号： H04L7/0054

摘要： An amplitude detection circuit generates an amplitude signal by detecting an amplitude of a received signal modulated by .pi./4 shift QPSK , and a first shift register and all amplitude difference detection circuit calculate an amplitude difference signal from the amplitude signal. Then, a second shift register and a calculation circuit calculate an amplitude difference accumulation signal from the amplitude difference signal, and a decision circuit generates a preset signal by deciding a sampling time from the amplitude difference accumulation signal and a preset signal. A counter divides a master clock signal by the preset signal, thereby generating a symbol clock signal.

摘要翻译： 振幅检测电路通过检测由pi / 4移位QPSK调制的接收信号的幅度来产生振幅信号，第一移位寄存器和全幅幅差检测电路从振幅信号中计算振幅差信号。 然后，第二移位寄存器和计算电路根据振幅差信号计算振幅差积分信号，判定电路根据幅度差积分信号和预设信号决定采样时间，生成预设信号。 计数器将主时钟信号除以预置信号，从而产生符号时钟信号。