公开(公告)号：US4466132A

公开(公告)日：1984-08-14

申请号：US365143

申请日：1982-04-05

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04B7/00 ,  H04B1/12

CPC分类号： H04B7/002

摘要： A digital transmission system is provided based on a cross-polarization band-sharing technique using a conventional antenna system which does not have a sufficient cross-polarization discrimination.An interference elimination circuit receives two mutually orthogonal cross-polarized waves and restores to at least one of the received cross-polarized signals, a baseband signal which is free of cross-polarization interference attributable to orthogonal cross-polarization crosstalk components. This circuit includes an orthogonal cross-polarization, crosstalk component adder having a weighting circuit for multiplying an interference component of the received orthogonal cross-polarized signals by a compensation coefficient. A compensating adder adds the output of the weighting circuit to a desired one of the received cross-polarized signals. An error detector detects the difference between a transmitted signal and the desired one of said received signals on the basis of the output of said cross-polarization crosstalk component adder. An oscillator generates cyclic infinitesimal signals which a correlator uses for detecting any correlation between the output of the oscillator and the output of the error detector. An integrator integrates the output of said correlator. A control unit adds the output of the integrator to the output of the oscillator and supplies the resulting sum as the compensation coefficient for the weighting circuit of the orthogonal cross-polarization component adder.

摘要翻译： 基于使用不具有足够的交叉极化鉴别的常规天线系统的交叉极化频带共享技术来提供数字传输系统。 干扰消除电路接收两个相互正交的交叉极化波并恢复至接收的交叉极化信号中的至少一个，即基于正交交叉极化串扰分量的无交叉极化干扰的基带信号。 该电路包括正交交叉极化串扰分量加法器，具有用于将接收的正交交叉极化信号的干扰分量乘以补偿系数的加权电路。 补偿加法器将加权电路的输出与所接收的交叉极化信号中的一个相加。 误差检测器基于所述交叉极化串扰分量加法器的输出来检测所发送的信号与所述所接收的信号之间的差异。 振荡器产生相关器用于检测振荡器的输出和误差检测器的输出之间的任何相关性的循环无穷小信号。 积分器对所述相关器的输出进行积分。 控制单元将积分器的输出加到振荡器的输出端，并将所得到的和作为正交交叉偏振分量加法器的加权电路的补偿系数。

公开(公告)号：US4742512A

公开(公告)日：1988-05-03

申请号：US887003

申请日：1986-07-18

申请人： Fumio Akashi ,  Kazutomo Kobayashi ,  Junji Namiki ,  Kojiro Watanabe

发明人： Fumio Akashi ,  Kazutomo Kobayashi ,  Junji Namiki ,  Kojiro Watanabe

IPC分类号： H04B7/185 ,  H04L12/403 ,  H04L12/56 ,  H04J3/16 ,  H04J3/06

CPC分类号： H04L12/403 ,  H04B7/18528 ,  H04W28/26 ,  H04W4/06 ,  H04W74/06 ,  H04W76/02 ,  H04W84/06

摘要： In a multipoint communication system, first polling signals are sequentially and respectively transmitted to terminal stations on a broadcast channel from a central station, asking a request for reservation without waiting for a reply from the terminal stations. A reservation signal is transmitted on a multiple access channel from a terminal station requesting the reservation to the central station in response to the first polling signal addressed to it. A second polling signal is then transmitted on the broadcast channel in response to the reservation signal and the multiple access channel is reserved for a period of time variable in accordance with the reservation signal. A data signal is transmitted from the terminal station requesting the reservation on the reserved multiple access channel in response to the second polling signal.

摘要翻译： 在多点通信系统中，第一轮询信号依次分别从中央站在广播频道上发送到终端站，请求等待来自终端的回复请求。 响应于寻址到中央站的第一轮询信号，在多址接入信道上从终端请求预约到中心站的预约信号被发送。 然后响应于预留信号在广播信道上发送第二轮询信号，并且多个接入信道被保留用于根据预留信号可变的一段时间。 响应于第二轮询信号，从终端请求预约的数据信号在保留的多址信道上发送。

公开(公告)号：US4168398A

公开(公告)日：1979-09-18

申请号：US849581

申请日：1977-11-08

申请人： Yoshio Matsuo ,  Junji Namiki ,  Yukitsuna Furuya

发明人： Yoshio Matsuo ,  Junji Namiki ,  Yukitsuna Furuya

IPC分类号： H04B7/212 ,  H04L7/10

CPC分类号： H04B7/2125

摘要： A low level initial acquisition signal consisting of a continuous wave signal portion followed by a phase-modulated signal portion is transmitted via a satellite to a receiving station. The received CW signal is converted by a voltage-controlled variable frequency local oscillator to an intermediate frequency signal which is fed to a narrow passband filter. The local oscillator frequency is linearly swept, and the maximum signal passing through the filter during one sweep is detected. The local oscillator is then locked at the local frequency which produced the maximum signal, thereby effecting frequency acquisition. Next, the phase-modulated signal portion is multiplied by a phase-modulated signal output from a variable phase local signal generator. The phase of the local generator is also swept, and the maximum phase correlation signal passing through the band pass filter is again detected, and the phase of the generator output is corrected by the phase shift which produced the maximum phase correlation signal. This phase shift is used as a basis for determining the proper timing for acquisition of the correct time slot in the TDMA frame at the satellite for a transmitted data burst. The acquisition is confirmed by comparing the maximum phase correlation signal obtained during phase sweeping with the signal level obtained after the phase of the generator has been locked.

摘要翻译： 由连续波信号部分跟随相位调制信号部分组成的低电平初始采集信号通过卫星传送到接收站。 所接收的CW信号由压控可变频率本地振荡器转换为馈送到窄通带滤波器的中频信号。 本地振荡器频率被线性扫描，并且检测到在一次扫描期间通过滤波器的最大信号。 然后将本地振荡器锁定在产生最大信号的本地频率上，从而进行频率采集。 接下来，将相位调制信号部分乘以从可变相位本地信号发生器输出的相位调制信号。 本地发生器的相位也被扫描，并且再次检测到通过带通滤波器的最大相位相关信号，并且通过产生最大相位相关信号的相移校正发生器输出的相位。 该相移被用作确定在发送的数据突发的卫星的TDMA帧中获取正确时隙的适当定时的基础。 通过将相位扫描期间获得的最大相位相关信号与在发生器的相位锁定后获得的信号电平进行比较来确认采集。

公开(公告)号：US5400391A

公开(公告)日：1995-03-21

申请号：US289545

申请日：1994-08-11

申请人： Katsumi Emura ,  Makoto Shibutani ,  Junji Namiki ,  Toshihito Kanai

发明人： Katsumi Emura ,  Makoto Shibutani ,  Junji Namiki ,  Toshihito Kanai

IPC分类号： H04B10/2575 ,  H04W88/08 ,  H04M11/00

CPC分类号： H04B10/25753 ,  H04B10/25752 ,  H04B10/25759 ,  H04W88/085

摘要： A cellular mobile communication system in which each of one or more cells is provided with a base radio station, and mobile terminals communicate with the base radio stations. Base radio stations (21, 22 and 23) are connected to a central base station (100) by optical fibers. The central base station is connected to a mobile switching center (50). Each of the base radio stations is provided with an O/E converter (201) and E/O converter (207). The O/E converter converts a optical signal containing speech signals and a call connection control signal into RF signals. The E/O converter (207) converts RF signals, received from a mobile terminal (11) via an antenna (204), into optical signals and transmits the optical signals to the central base station. The central base station comprises O/E converters (301-303) for converting optical signals from each base radio station into RF signals; receivers (401-403) for demodulating these RF signals; transmitters (406-408) for converting speech signals and a call connection control signal from the mobile switching center into RF signals; and E/O converters (304-306) for converting these RF signals into optical signals and transmitting the optical signals to a base radio station.

摘要翻译： 一种蜂窝移动通信系统，其中一个或多个小区中的每一个被提供有基站无线电台，并且移动终端与基站无线电台进行通信。 基站无线电站（21,22和23）通过光纤连接到中央基站（100）。 中央基站连接到移动交换中心（50）。 每个基站广播台设置有O / E转换器（201）和E / O转换器（207）。 O / E转换器将包含语音信号和呼叫连接控制信号的光信号转换成RF信号。 E / O转换器（207）将从移动终端（11）经由天线（204）接收的RF信号转换为光信号，并将光信号发送到中央基站。 中央基站包括用于将来自每个基站的光信号转换为RF信号的O / E转换器（301-303） 接收器（401-403），用于解调这些RF信号; 发射机（406-408），用于将来自移动交换中心的语音信号和呼叫连接控制信号转换成RF信号; 和用于将这些RF信号转换为光信号并将光信号发送到基站的E / O转换器（304-306）。

公开(公告)号：US4686672A

公开(公告)日：1987-08-11

申请号：US659567

申请日：1984-10-10

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04B7/212 ,  H04J3/16 ,  H04J3/06

CPC分类号： H04B7/2123

摘要： A telecommunication system includes an earth-to-satellite-to earth link over which transmission is made on a time division basis. Each earth station assembles data to be transmitted in bursts during time period assigned to such earth station. The time position has a variable length which corresponds to the amount of data that is to be sent. The time positions are shifted to immediately follow each other with no idle and unused time space in or between adjoining time positions. Thus, each time frame is adaptively changed to fit the instantaneous communications traffic needs.

摘要翻译： 一个电信系统包括一个地对卫星对地链路，在这个链路上进行时分的传输。 每个地球站在分配给这样的地球站的时间段期间组合要以突发方式发射的数据。 时间位置具有对应于要发送的数据量的可变长度。 时间位置被转移以在相邻时间位置之间或之间没有空闲和未使用的时间空间紧密相连。 因此，每个时间帧被自适应地改变以适应瞬时通信业务需求。

公开(公告)号：US4057762A

公开(公告)日：1977-11-08

申请号：US753143

申请日：1976-12-21

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04L27/227 ,  H04L27/00 ,  H04L27/38 ,  H03D5/00

CPC分类号： H04L27/3818

摘要： A phase synchronizer for a reference carrier signal reproduced in a receiver for a combined amplitude and phase modulated signal comprises a window specifier for specifying windows for preselected ones of true signal points of which the demodulated signal is selectively representative. The phase synchronizer includes a demodulator for producing complex signals representative of coarse signal points so long as the reproduced carrier signal has a phase error which falls within the windows. Differences between the true points and the coarse points falling within the windows are calculated and summed up to produce a control signal for reducing the phase error substantially to zero.

摘要翻译： 在用于组合幅度和相位调制信号的接收机中再现的参考载波信号的相位同步器包括用于指定解调信号有选择地代表的真实信号点的预选择的窗口的窗口说明符。 相位同步器包括用于产生表示粗略信号点的复数信号的解调器，只要再现的载波信号具有落在窗口内的相位误差即可。 计算出落在窗口内的真实点与粗点之间的差异，并将其相加以产生用于将相位误差基本减小到零的控制信号。

公开(公告)号：US4498885A

公开(公告)日：1985-02-12

申请号：US512649

申请日：1983-07-11

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04B1/12 ,  H04L1/06 ,  H04B7/08

CPC分类号： H04B1/126 ,  H04L1/06

摘要： A space diversity system for transmitting digital microwaves is disclosed. Each of two antennas receives a direct wave and an interference wave. The output phase of one of the two antennas is controlled to combine an output thereof with that of the other antenna, so that the interference waves cancel each other and a vector sum of the direct waves is produced as a combined output. Even if the two antenna inputs are so much alike, the combined output level and thereby the signal-to-noise ratio is prevented from being lowered whereby error in identification is eliminated.

摘要翻译： 公开了一种用于传输数字微波的空间分集系统。 两个天线中的每一个接收直接波和干扰波。 控制两个天线之一的输出相位以将其输出与另一个天线的输出相组合，使得干扰波彼此抵消，并且产生直接波的矢量和作为组合输出。 即使两个天线输入非常相似，也可以防止组合的输出电平和信噪比被降低，从而消除识别中的错误。

公开(公告)号：US4479258A

公开(公告)日：1984-10-23

申请号：US416112

申请日：1982-09-09

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04B7/00 ,  H04L27/06 ,  H04B1/12

CPC分类号： H04B7/002 ,  H04L27/06

摘要： A cross-polarization crosstalk canceller is equipped to receive two polarized waves which are orthogonally crossing each other. The cross-polarization interference is eliminated by multiplying the signal received on one side by a compensating coefficient and adding the resulting product to the signal received on the other side. A discrimination error represents the difference between the reception signal after compensation and the identified value thereof. An adder and a subtractor supplies the sum and the difference between the real part and the imaginary part of the discrimination error. A discriminator detects equality between the absolute values of the real part and the imaginary part of the signal received on the interfering polarized wave side and supplies a control signal depending on the quadrant to which the signal belongs. A switch combines and varies a combination of the signs of the outputs of the adder and subtractor in response to the control signal supplied by the discriminator. A low-pass filter smooths the output of the switching in order to give the compensation coefficient.

摘要翻译： 配备交叉极化串扰消除器以接收彼此正交交叉的两个偏振波。 通过将在一侧接收的信号乘以补偿系数来消除交叉极化干扰，并将得到的乘积与另一侧接收的信号相加。 鉴别误差表示补偿后的接收信号与其识别值之间的差。 加法器和减法器提供鉴别误差的实部和虚部之和和之差。 鉴别器检测在干扰极化波侧接收的信号的实部和虚部的绝对值之间的相等，并且根据信号所属的象限提供控制信号。 开关根据由鉴别器提供的控制信号组合并改变加法器和减法器的输出的符号的组合。 低通滤波器平滑开关的输出以给出补偿系数。

公开(公告)号：US4380082A

公开(公告)日：1983-04-12

申请号：US257234

申请日：1981-04-24

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04B1/10 ,  H04L25/08 ,  H04L1/00

CPC分类号： H04B1/10 ,  H04L25/08

摘要： The invention eliminates an FM interference from a digital signal when the interference occurs because the FM and digital signals are transmitted over adjacent routes and sharing a common frequency band. An error detector finds a difference between a detected baseband digital signal and an assumed transmission code, which is taken from the baseband signal. The detector produces a first error signal responsive thereto. A phase synchronizing circuit produces an output signal synchronized with the first error signal. A coefficient circuit multiplies the output of the synchronizing circuit by a complex coefficient which is then subtracted from the baseband signal. A second error detector produces a second error signal responsive to the difference between the output of the subtractor and a discriminated transmission code. Responsive thereto to a control circuit varies the complex coefficient to produce an output which is the original baseband signal, free of the FM interference.

摘要翻译： 当发生干扰时，本发明消除了来自数字信号的FM干扰，因为FM和数字信号在相邻路由上传输并共享共同的频带。 误差检测器发现检测到的基带数字信号与从基带信号取得的假定传输码之间的差异。 检测器响应于此产生第一误差信号。 相位同步电路产生与第一误差信号同步的输出信号。 系数电路将同步电路的输出乘以复系数，然后将其从基带信号中减去。 第二误差检测器响应于减法器的输出和识别的传输代码之间的差异产生第二误差信号。 响应于控制电路改变复系数以产生作为原始基带信号的输出，没有FM干扰。

公开(公告)号：US4701935A

公开(公告)日：1987-10-20

申请号：US817380

申请日：1986-01-09

申请人： Junji Namiki

发明人： Junji Namiki

IPC分类号： H04B7/155 ,  H04B7/15

CPC分类号： H04B7/15585

摘要： A digital microwave radio repeater using the same carrier frequency for the transmitter and the receiver carriers for improving the frequency utilization efficiency. The transmitter-to-receiver interference signal is cancelled by producing an estimated-interference signal of the interference signal from the digital baseband signal by the use of a transversal filter and by subtracting the estimated-interference signal from the received signal. The estimated-interference signal is also produced by frequency shifting a digital modulated signal in the transmitter. The transmitter carrier frequency is locked to the receiver carrier frequency by the use of a phase-locking technique, so that the interference signal is reduced.

摘要翻译： 一种使用相同载波频率的数字微波无线电中继器，用于发射机和接收机载波，以提高频率利用效率。 通过使用横向滤波器产生来自数字基带信号的干扰信号的估计干扰信号并从接收信号中减去估计干扰信号来消除发射机到接收机干扰信号。 估计的干扰信号也是通过对发射机中的数字调制信号进行频移来产生的。 发射机载波频率通过使用锁相技术锁定到接收机载波频率，从而降低干扰信号。