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：US07283491B2

公开(公告)日：2007-10-16

申请号：US10281256

申请日：2002-10-28

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04B7/212

CPC classification number: H04H40/90 ,  H04B7/18582 ,  H04H20/74 ,  H04L12/1836 ,  H04L12/1859 ,  H04L12/189 ,  H04L29/06 ,  H04L67/325 ,  H04L69/329 ,  H04N7/17318 ,  H04N7/20 ,  H04N21/2385 ,  H04N21/47214 ,  H04N21/6143 ,  H04N21/6175

Abstract: In a communication system for carrying out satellite communication through a satellite among users, a satellite communication center is located in a terrestrial network, such as an internet, and has a program table accessible through the terrestrial network and representative of a time schedule of each program to be broadcast through the satellite. The program table can be reserved to broadcast contents by a sender through the internet when an empty time zone is left on the program table. When the reservation is accepted, the contents are sent from the sender through the internet to the satellite communication center and are broadcast at a reserved time through the satellite to other users in accordance with the program table. The contents may be stored in advance in an information storage of the satellite communication center once before they are broadcast or be directly broadcast to the satellite at the reserved time.

Abstract translation: 在用于通过卫星进行卫星通信的通信系统中，卫星通信中心位于诸如互联网的地面网络中，并且具有可通过地面网络访问的节目表，并且代表每个节目的时间表 通过卫星广播。 当节目表上剩下空白时区时，节目表可以由发送者通过互联网预约广播内容。 当预约被接受时，内容通过互联网从发送方发送到卫星通信中心，并且按照节目表通过卫星在保留时间内向其他用户广播。 该内容可以在广播之前预先存储在卫星通信中心的信息存储中，或者在保留时间直接广播到卫星。

公开(公告)号：US07155160B2

公开(公告)日：2006-12-26

申请号：US09835518

申请日：2001-04-17

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04H1/00

CPC classification number: H04H20/74 ,  H04B7/18584 ,  H04H2201/19 ,  H04N7/17318 ,  H04N21/6143

Abstract: Connected to a satellite earth station for transmitting a broadcast signal to a communication satellite, a data (distribution) center publishes contents of stored information on a home page (HP) of the Internet to submit retrieval of users. When each user determines date to be gotten by retrieving on HP, the user transmits a request signal to the date center via a ground Internet or the communication satellite. Responsive to the request signal, the date center returns a reservation signal including a group address and a distribution scheduled time instant to a request source via the communication satellite. A user's terminal receives date with the group address at a reserved time instant, deciphers the date using a key given from the date center separately, and stores deciphered date in a memory thereof.

Abstract translation: 连接到用于向通信卫星发送广播信号的卫星地球站，数据（分发）中心将存储的信息的内容发布在因特网的主页（HP）上，以提交用户的检索。 当每个用户确定通过在HP上检索获得的日期时，用户经由地面因特网或通信卫星向日期中心发送请求信号。 响应于请求信号，日期中心经由通信卫星将包括组地址和分配预定时刻的预约信号发送到请求源。 用户终端在保留的时刻接收具有组地址的日期，使用从日期中心给出的密钥来解密日期，并将解密的日期存储在其存储器中。

公开(公告)号：US6009313A

公开(公告)日：1999-12-28

申请号：US886954

申请日：1997-07-02

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H04B1/26 ,  H03D7/16 ,  H04B1/40 ,  H04J4/00 ,  H04N5/50

CPC classification number: H03D7/163 ,  H04B1/405

Abstract: A radio communication device includes a transmission carrier generating circuit, a reception intermediate-frequency local signal generating circuit), a transmission radio-frequency local signal generating circuit and a reception radio-frequency local signal generating circuit, each of which is in the form of a frequency synthesizer. The radio communication device further includes a channel connection signal control circuit which cooperatively controls the transmission carrier generating circuit and the transmission radio-frequency local signal generating circuit and cooperatively controls the reception intermediate-frequency local signal generating circuit and the reception radio-frequency local signal generating circuit.

Abstract translation: 无线电通信装置包括：发送载波发生电路，接收中频本地信号发生电路），发送无线电频率本地信号发生电路和接收射频本地信号发生电路，各电路形式为 频率合成器。 无线电通信装置还包括一个信道连接信号控制电路，它协调地控制传输载波发生电路和传输射频本地信号发生电路，并协同控制接收中频本地信号发生电路和接收射频本地信号 发电电路。

公开(公告)号：US5357447A

公开(公告)日：1994-10-18

申请号：US771727

申请日：1991-10-04

Applicant: Osamu Ichiyoshi

Inventor： Osamu Ichiyoshi

IPC: H03L7/08 ,  H03L7/099 ,  H03L7/16 ,  H04L7/00 ,  H04L25/05 ,  G06F7/68 ,  G06F1/04

CPC classification number: H03L7/16 ,  H03L7/0991 ,  H04L25/05 ,  H03L2207/10

Abstract: A first clock signal of fl in frequency is converted into a second clock signal having a frequency of f2=(n/m) f1. The first clock signal is converted by a tank circuit (12) and a converter (13) into an R-bit first phase signal (.theta.1) indicating the phase of the first clock signal. The first phase signal is multiplied by n (mod 2.sup.R) by a multiplier to provide a second phase signal (.theta.3). The second phase signal is supplied to a digital phase-locked loop (PLL) (3) comprising a subtractor (15), a low-pass filter (LPF) (16), a numerically controlled oscillator (NCO) (17) and a multiplier (18). The multiplier in the digital PLL (3) multiplies a third phase signal by m (mod 2.sup.R), indicating the phase of a second clock signal which is the output of the NCO (17), to generate a fourth phase signal. The subtractor (15) generates a signal representing the phase error between the second and fourth phase signals. This phase error signal is filtered by the LPF (16) to control the oscillating phase of the NCO (17). A clock generating circuit generates the second clock signal, on the basis of the third phase signal.

Abstract translation: 频率为f1的第一时钟信号被转换为频率为f2 =（n / m）f1的第二时钟信号。 第一时钟信号由储能电路（12）和转换器（13）转换为指示第一时钟信号的相位的R位第一相位信号（θ1）。 第一相位信号通过乘法乘以n（mod 2R）以提供第二相位信号（θ3）。 第二相位信号被提供给数字锁相环（PLL）（3），包括减法器（15），低通滤波器（LPF）（16），数控振荡器（NCO）（17）和 乘数（18）。 数字PLL（3）中的乘法器将第三相位信号乘以m（mod 2R），指示作为NCO（17）的输出的第二时钟信号的相位，以产生第四相位信号。 减法器（15）产生表示第二和第四相位信号之间的相位误差的信号。 该相位误差信号由LPF（16）滤波，以控制NCO（17）的振荡阶段。 时钟发生电路基于第三相位信号产生第二时钟信号。