公开(公告)号：US5291144A

公开(公告)日：1994-03-01

申请号：US954656

申请日：1992-09-30

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H03L7/087 ,  H03L7/099 ,  H03K5/13 ,  H03K5/22

CPC classification number: H03L7/0991 ,  H03L7/087

Abstract: In a phase-locked circuit which is operable in response to an input complex signal to produce an output complex signal, a first complex multiplication is carried out between the input and the output complex signals to obtain a phase difference therebetween which appears as a complex phase difference. The complex phase difference is composed of a real part and an imaginary part which are individually allowed to pass through a low pass filter and to be supplied to a numerically controlled oscillator as a control signal. The control signal includes a frequency component even when the phase-locked circuit is put into an asynchronous state. The low pass filter may be replaced by a digital circuit comprising phase dividers.

Abstract translation: 在可以响应于输入复数信号而产生输出复信号的锁相电路中，在输入和输出复信号之间执行第一复数乘法，以获得它们之间的相位差，呈现为复相 区别。 复相位差由实部和虚部组成，其被单独允许通过低通滤波器并被提供给作为控制信号的数控振荡器。 即使当锁相电路处于异步状态时，控制信号也包括频率分量。 低通滤波器可以由包括相位分配器的数字电路代替。

公开(公告)号：US4914735A

公开(公告)日：1990-04-03

申请号：US241626

申请日：1988-09-08

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: G01S5/10 ,  G01S1/30 ,  G01S13/32 ,  G01S13/38 ,  H04B7/15

CPC classification number: G01S1/30 ,  G01S13/325 ,  G01S13/38

Abstract: A propagation time detecting system wherein a transmitting station transmits to a receiving station, over a plurality of transmitting paths or lines having different propagation times, a transmission signal comprising a sequence of transmission data digitized by a clock signal of a clock frequency. The receiving station receives the transmission signal through the respective transmitting paths or lines as different received signals, and reproduces the sequence of transmission data and the clock signal as different reproduced sequences of transmission data and different reproduced clock signals, from which differences are detected among the different propagation times. In order to improve the accuracy of the detected differences, at least one subcarrier signal with a frequency higher than the clock frequency is also transmitted together with the transmission signal. The receiving station also reproduces the subcarrier signals as different reproduced subcarrier signals which are compared with each other to determine time differences therebetween with a reduced time order. In an application to a radar system, the transmission signal including the subcarrier signal is compared with an echo of the transmission signal from an target to determine the propagation time between the radar and the target.

公开(公告)号：US6014366A

公开(公告)日：2000-01-11

申请号：US839753

申请日：1997-04-15

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04L27/34 ,  H04J1/05 ,  H04J3/00 ,  H04J4/00 ,  H04J1/04 ,  H04J1/18

CPC classification number: H04J4/005

Abstract: A variable-bandwidth frequency-division multiplex communication system which needs no interpolation circuits, but uses switch element of simple structure. The system includes a signal combining circuit which has N A/D converters associated respectively with independent information signals to be transmitted, a complex local oscillator for generating complex signals each having a frequency k.DELTA.f (1.ltoreq.k.ltoreq.N-1), .DELTA.f being the channel frequency interval, N complex multipliers for multiplying the outputs of the A/D converters by the respective complex signals, and producing N output signals, a circuit for effecting an inverse Fourier transform of N points, an N.times.N switch circuit connected between the outputs of the complex multipliers and input terminals of the inverse Fourier transform circuit, N digital subfilters connected respectively to the outputs of the inverse Fourier transform circuit, N delay units connected respectively to outputs of the digital subfilters, and an adder for adding output signals from the delay units and outputting a sum signal.

Abstract translation: 一种不需要插值电路的可变带宽分频多路复用通信系统，但采用结构简单的开关元件。 该系统包括信号组合电路，该信号组合电路具有分别与待传输的独立信息信号相关联的NA / D转换器，复数本地振荡器，用于产生每个具有频率k DELTA f（1≤k≤N-1 ），DELTA f是通道频率间隔，N个复数乘法器，用于将A / D转换器的输出乘以各个复数信号，并产生N个输出信号，用于进行N点的逆傅里叶变换的电路，N×N个开关 连接在复数乘法器的输出端和逆傅里叶变换电路的输入端之间的电路，分别连接到傅里叶逆变换电路的输出端的N个数字子滤波器，分别连接到数字子滤波器的输出端的N个延迟单元，以及用于 从延迟单元中添加输出信号并输出​​和信号。

公开(公告)号：US5991280A

公开(公告)日：1999-11-23

申请号：US764252

申请日：1996-12-12

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04B7/212 ,  H04B7/19

CPC classification number: H04B7/2125

Abstract: A TDMA timing control method and apparatus for use in a TDMA satellite communication network synchronizes land earth stations in a global beam system and even in a multi beam system having generally no return channel. A land earth station of the satellite network generates a transmission timing thereof on the basis of its own time base and detects a receiving time of a signal from another land earth station. Times of the land earth stations are synchronized by exchanging the information of their own transmission timing and the receiving times of the signals with other land earth stations through control bursts, calculating time errors of their own time bases by solving simultaneous equations including time errors of the time bases of the other land earth station and propagation times to the satellite as unknown quantities and correcting the times of the time bases on the basis of the time errors.

Abstract translation: 用于TDMA卫星通信网络的TDMA定时控制方法和装置在全局波束系统中甚至在通常不具有返回信道的多波束系统中同步陆地地球站。 卫星网络的陆地基站根据其自身的时基生成其发送定时，并且检测来自另一个陆地地球站的信号的接收时间。 通过控制脉冲串与其他陆地地球站交换信号的自身发送定时信息和接收时间，从而计算陆地地球站的时间，通过求解包含时间误差的联立方程 其他陆地地球站的时基和卫星的传播时间为未知数量，并根据时间误差校正时间基准。

公开(公告)号：US4901310A

公开(公告)日：1990-02-13

申请号：US242707

申请日：1988-09-09

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04B7/185 ,  H04B7/15 ,  H04B7/204

CPC classification number: H04B7/2045 ,  H04B7/2041 ,  H04B7/18539

Abstract: A satellite communication system includes a plurality of mobile stations which are situated on the earth and a communication satellite which is communicable with the mobile stations by radio signals over a plurality of spot beams. The satellite applies single sideband amplitude modulation (SSB-AM) to analog signals which are sent from the mobile stations, applies digital modulation to coded voice and data, and separates signals in the form of frequency-division-multiplexed (FDM) signals on a channel basis by a transmultiplexer method which is implemented by demultiplexers of a transponder. Baseband matrix means is provided for connecting an output of any of the demultiplexers to one of the spot beams to be transmitted. Further, transmitting means is provided for time-division-multiplexing outputs of the baseband matrix means to form a transmit frame and transmitting it in the form of a TDM signal. On the other hand, each mobile station includes a receiver for selecting a channel signal to be received out of the TDM signal which is sent from the transmitting means of the onboard transponder, and demodulates it to regenerate a signal.

公开(公告)号：US4833696A

公开(公告)日：1989-05-23

申请号：US847366

申请日：1986-04-02

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04L5/14 ,  H04L27/18 ,  H04L27/22 ,  H04L29/06

CPC classification number: H04L5/1438 ,  H04L27/22

Abstract: A modulator/demodulator operation mode control system specifies an operation mode, which is a combination of particular data transmission rate, multi-phase PSK modulation system, error-correction coding rate and others, in which a modulator/demodulator is to operate, while deciding the operation mode and controlling the modulator/demodulator. A transmit station designates a particular operation mode in a plurality of bits in terms of polarities of unique words, while a receive station switches a demodulator thereof to the designated operation mode responsive to an output of mode switchover signal decision means and based on signal representative of detection of the unique words.

Abstract translation: 调制器/解调器操作模式控制系统指定操作模式，其是调制器/解调器将要运行的特定数据传输速率，多相PSK调制系统，纠错编码速率等的组合，同时决定 操作模式和控制调制器/解调器。 发送站在唯一字的极性方面指定多个比特中的特定操作模式，而接收站响应于模式切换信号判定装置的输出，并且基于代表信号的信号，将其解调器切换到指定的操作模式 检测到独特的词。

公开(公告)号：US07002945B2

公开(公告)日：2006-02-21

申请号：US09851975

申请日：2001-05-10

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04B7/216 ,  H04B1/69 ,  H04B1/707 ,  H04J3/06

CPC classification number: H04L5/026

Abstract: A spreading code setting circuit generates N vectors, as spreading codes, which are +1 or −1 polarity and are unique to users. A multiplier multiplies the nth data and the nth spreading code corresponding thereto for the spread modulation. An FDM combining circuit modulates N pieces of data according to the FDM method. A FDM separating circuit demodulates received signals according to the FDM method. An inverse spreading code setting circuit generates N vectors, as inverse spreading codes, which are +1 or −1 polarity and are unique to users at the transmission side. A multiplier multiplies the nth data and the nth inverse spreading code corresponding thereto for inverse spread modulation.

Abstract translation: 扩展码设置电路产生N个向量，作为扩展码，其为+1或-1极性，并且是用户唯一的。 乘法器将对应于其的第n个数据和第n个扩展码乘以扩展调制。 FDM组合电路根据FDM方法对N个数据进行调制。 FDM分离电路根据FDM方法解调接收信号。 反向扩展码设置电路产生作为反向扩展码的N个向量，它们是+1或-1极性，并且对于发送侧的用户是唯一的。 乘法器将与其对应的第n个数据和第n个反向扩展码乘以进行反向扩展调制。

公开(公告)号：US5867792A

公开(公告)日：1999-02-02

申请号：US971506

申请日：1997-11-17

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04B7/26 ,  H04B1/00 ,  H04B7/00 ,  H04B7/15

CPC classification number: H04B7/155

Abstract: A radio communication system comprises a plurality of personal terminals and a base station, the personal terminal being equipped with a non-directional antenna or a directional antenna directed to the base station, which transmits and receives a signal at an identical frequency, the base station, which establishes a communication path between the personal terminals by relaying of the signals, comprising a non-directional transmitting antenna and a receiving antenna located in such a positional relationship as to minimize the amounts of the signals coupled at the respective antennas, and feeds the received signal received by the receiving antenna to the transmitting antenna while cancelling a leakage signal from the transmitting antenna which is contained in the received signal, by using a reference signal set on a given frequency channel which may be modulated with a broadcast signal.

Abstract translation: 无线电通信系统包括多个个人终端和基站，该个人终端装备有定向天线或指向基站的定向天线，其以相同的频率发送和接收信号，该基站 ，其通过中继信号来建立个人终端之间的通信路径，包括非定向发射天线和位置关系中的接收天线，以使耦合在各个天线的信号的量最小化，并馈送 通过使用在可以利用广播信号进行调制的给定频率信道上设置的参考信号，从接收天线接收到的接收信号发送到发射天线，同时从接收信号中包含的发射天线中消除泄漏信号。

公开(公告)号：US5281974A

公开(公告)日：1994-01-25

申请号：US915764

申请日：1992-07-21

Applicant: Akio Kuramoto ,  Toshinobu Yamane ,  Osamu Ichiyoshi ,  Kazuo Kosukegawa

Inventor： Akio Kuramoto ,  Toshinobu Yamane ,  Osamu Ichiyoshi ,  Kazuo Kosukegawa

IPC: H01Q3/30 ,  H01Q21/22

CPC classification number: H01Q21/22 ,  H01Q3/30

Abstract: In an antenna device comprising an antenna block which can electrically control a direction of a radio wave transmitted or received by the antenna device, a phase shift unit is connected to the antenna block to phase shift an external electric signal or an internal electric signal given to or from the antenna device. The phase shift unit has variable and discrete phase shifts switched from one to another in response to a control signal supplied from a controller and supplies a phase shifted external signal to the antenna block or a phase shifted internal signal to an external device. The antenna block comprises a plurality of antenna elements and a plurality of phase shifters which are connected to the antenna elements to send the phase shifted external signal to the respective antenna elements or to send the internal electric signal to the phase shift unit.

Abstract translation: 在包括天线块的天线装置中，天线块可以电气地控制由天线装置发送或接收的无线电波的方向，相位单元连接到天线块，以将外部电信号或给定的内部电信号 或从天线装置。 相移单元响应于从控制器提供的控制信号而将可变和离散相移从一个切换到另一个，并将相移的外部信号提供给天线块或将相移的内部信号提供给外部设备。 天线块包括多个天线元件和多个移相器，其连接到天线元件以将相移的外部信号发送到相应的天线元件或将内部电信号发送到相移单元。

公开(公告)号：US4879713A

公开(公告)日：1989-11-07

申请号：US249943

申请日：1988-09-27

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: G01S5/06 ,  G01S19/46 ,  H04B7/216

CPC classification number: G01S19/00 ,  G01S5/06 ,  H04B7/216

Abstract: A satellite-based vehicle communication/position determination system constituted by N (N.gtoreq.3) geostationary satellites, a plurality of vehicle stations for performing radio-wave exchange with the satellites using a low-directivity antenna, and a base station having high-directivity antennas for independently performing radio-wave exchange with the N geostationary satellites is disclosed. The base station has a communication FDM receiver, N chirp signal receivers for receiving and pulse compressing chirp signals from a vehicle station, which are obtained via the N geostationary satellites, and a circuit for determining the position of the vehicle station based on time differences of compressed pulses from the chirp signal receivers. Each vehicle station has a communication FDM receiver, a transmitter, a chirp signal generator, and a switching control circuit for controlling to selectively output a transmitting signal or the chirp signal.