公开(公告)号：US4715033A

公开(公告)日：1987-12-22

申请号：US733714

申请日：1985-05-13

申请人： Akio Saburi

发明人： Akio Saburi

IPC分类号： H04B7/15 ,  B67D7/78 ,  G01F23/00 ,  H04B7/185 ,  H04B7/212 ,  H04Q11/04 ,  H04J3/06

CPC分类号： H04B7/18519 ,  H04B17/18

摘要： In each terrestrial station (12), a collecting circuit (97) collects those state information signals as a collected signal which represent states of operation of communication devices (94, 95). A state information signal sending device (101) sends the collected signal in a state information time slot which is predetermined in a TDMA frame outwardly of a standard/synchronization burst part and a data burst part for a standard earth station (10) and all terrestrial stations. The state information time slot is selected in different TDMA frames by the terrestrial stations. A central supervise/control apparatus (40) accompanying the standard earth station monitors the terrestrial station in response to the collected signals extracted from the respective TDMA frames. An alarm signal sending device (115) may send an alarm signal representative of an extraordinary state of operation in a synchronization burst of the terrestrial station in question. In this event, the standard earth station prevents other terrestrial stations from sending their respective collected signals during a predetermined time duration.

摘要翻译： 在每个地面站（12）中，收集电路（97）收集这些状态信息信号作为表示通信设备（94,95）的操作状态的收集信号。 状态信息信号发送装置（101）将采集的信号发送到标准/同步突发部分的标准/同步突发部分和数据突发部分中的TDMA帧中预定的状态信息时隙中，并且所有地面站 车站。 状态信息时隙由地面站在不同的TDMA帧中选择。 伴随标准地球站的中央监督/控制装置（40）响应于从各个TDMA帧提取的收集的信号来监视地面站。 报警信号发送装置（115）可以在所讨论的地面站的同步脉冲串中发送表示非正常操作状态的报警信号。 在这种情况下，标准地球站防止其他地面站在预定的持续时间内发送它们各自收集的信号。

公开(公告)号：US4688216A

公开(公告)日：1987-08-18

申请号：US732420

申请日：1985-05-09

申请人： Akio Saburi

发明人： Akio Saburi

IPC分类号： H04B7/212 ,  H04J3/06

CPC分类号： H04B7/2128

摘要： In a TDMA satellite communication network comprising a plurality of earth stations, a predetermined one of the stations is operable as a primary reference station for producing a first and a second reference burst to define a multiframe and a frame in an up-link signal, respectively. A synchronization burst is placed at every multiframe by each station with reference to the first and the second reference bursts detected from a down-link signal. A subsidiary reference station is selected from the remaining station to produce a specific one (SY2) of the synchronization bursts and a subsidiary reference burst (SR1) which is placed at the same time instant as the first and the second reference bursts. When the first and the second reference bursts disappear from the down-link signal, each station keeps synchronization with reference to the specific synchronization burst. Thereafter, synchronization is kept in each station with reference to the subsidiary reference station. The subsidiary reference burst may be produced in place of and simultaneously with the first and the second reference bursts when a single carrier frequency and a plurality of carrier frequencies are used in the network, respectively. Use of the plurality of carrier frequencies requires partial modification of hopping operation. The partial modification is possible by selectively producing a modification hopping code representative of modification of the hopping operation.

摘要翻译： 在包括多个地球站的TDMA卫星通信网络中，预定的一个站可用作主参考站，用于产生分别在上行链路信号中定义多帧和帧的第一和第二参考突发 。 参考从下行链路信号检测的第一和第二参考突发，每个站的每个复帧放置一个同步脉冲串。 从剩余站选择辅助参考站以产生同步突发的特定一个（SY2）和与第一和第二参考突发处于同一时刻放置的辅助参考突发（SR1）。 当第一和第二参考突发从下行链路信号消失时，每个站保持参考特定的同步突发的同步。 此后，参考辅助参考站在每个站中保持同步。 当分别在网络中使用单个载波频率和多个载波频率时，可以产生辅助参考突发来代替第一和第二参考脉冲串同时发生。 使用多个载波频率需要部分修改跳频操作。 通过选择性地产生代表跳频操作的修改的修改跳频码，可以进行部分修改。

公开(公告)号：US4147894A

公开(公告)日：1979-04-03

申请号：US836666

申请日：1977-09-26

申请人： Yoshio Watanabe ,  Akio Saburi

发明人： Yoshio Watanabe ,  Akio Saburi

IPC分类号： H04J3/00 ,  H04B7/15 ,  H04B7/185 ,  H04B7/212 ,  H04J3/06 ,  H04Q11/04

CPC分类号： H04Q11/04 ,  H04B7/212 ,  Y10S370/914

摘要： Like a conventional time division multiplex communication device, a device according to this invention comprises first terminals, a switching matrix, transducers or C/E buffers, control circuits, and second terminals. The first and second terminals are for low-speed and high-speed signal sequences. The control circuits are connected to the second terminals. In contrast to the conventional one, the transducers are connected to the respective first terminals, with the switching matrix interposed between the transducers and the control circuits and rendered capable of dealing with the high-speed signal sequences, among others, rather than the low-speed ones as in the conventional device. The devices are particularly useful in earth stations of TDMA satellite communication to which multi-transponder operation is applied, although useful also in carrying out conversion between low-frequency analog signal or PAM signal sequences and PAM signal sequences of a higher rate.

摘要翻译： 像传统的时分复用通信设备一样，根据本发明的设备包括第一终端，交换矩阵，换能器或C / E缓冲器，控制电路和第二终端。 第一和第二端子用于低速和高速信号序列。 控制电路连接到第二端子。 与常规的传感器相反，换能器连接到相应的第一端子，其中开关矩阵插入在换能器和控制电路之间，并且能够处理高速信号序列，而不是低频信号序列， 如常规设备那样。 这些装置在应用多应答器操作的TDMA卫星通信的地球站中特别有用，尽管在执行低频模拟信号或PAM信号序列和较高速率的PAM信号序列之间的转换方面也是有用的。

公开(公告)号：US4905235A

公开(公告)日：1990-02-27

申请号：US145114

申请日：1988-01-19

申请人： Akio Saburi

发明人： Akio Saburi

IPC分类号： H04B7/185 ,  H04B7/212

CPC分类号： H04B7/18543 ,  H04B7/212

摘要： In a TDMA system comprising a plurality of earth stations communicable with one another by the use of a plurality of carrier waves through a transponder of a satellite which has an available electric power level, bursts carried by the carrier waves are individually and flexibly controlled in accordance with a burst time plan so that selected ones of the carrier waves have on the satellite a total electric power level which does not exceed the available electric power level at any time. The bursts therefore may have different power levels in dependency upon scales of the earth stations, traffics carried by the bursts, and receiving conditions at the earth conditions. The selected carrier waves can be transmitted or received by frequency hopping. Such control of the power level is carried out in each earth station by the use of a combination of an attenuator (67) and an attenuation control circuit (71) operated in accordance with the burst time plan.

公开(公告)号：US4107608A

公开(公告)日：1978-08-15

申请号：US747822

申请日：1976-12-06

申请人： Akio Saburi

发明人： Akio Saburi

IPC分类号： H04J3/00 ,  H04B7/15 ,  H04B7/212 ,  H04J3/06

CPC分类号： H04B7/2126

摘要： A burst synchronization technique employed in a multiple access TDMA communication system in which all member stations communicate through a common repeater apparatus such as a stationary satellite.A member station may gain access by transmitting during its allocated time slot. A time frame is defined as having a time duration equal to at least the time for the burst intervals of all the member stations preferably with at least a small guard time between bursts. A super-frame is defined as containing a plurality of frames which are sufficient in number to provide for a measurement period, a correction period and advance notice period and a propagation period.Synchronization at a station is attained by receiving a reference signal transmitted by one member station and returned from the repeater to all stations; measuring the magnitude and polarity of the difference of the super frame timing reference relative to that of the station; transmitting said difference in advance of correction and then correcting said station timing relative to the reference during a correction phase.Other member stations receive the different information only during the advance notice phase and correct only during the correction phase of a super frame, even in the absence of receiving a timing pulse for providing synchronization.Means are provided for facilitating synchronization between receiving and transmitting facilities at each station over a reduced time period.

摘要翻译： 在多址TDMA通信系统中采用的突发同步技术，其中所有成员站通过诸如固定卫星的公共中继器装置进行通信。

公开(公告)号：US4028497A

公开(公告)日：1977-06-07

申请号：US672797

申请日：1976-04-01

申请人： Akio Saburi

发明人： Akio Saburi

IPC分类号： H04J3/00 ,  H04B7/15 ,  H04B7/212 ,  H04J3/06

CPC分类号： H04B7/2126

摘要： An initial acquisition technique for a time division multiple access (TDMA) communication system, employing an access signal of a frequency varying periodically in a predetermined relation to the TDMA time frame. Means are provided for detecting when the frequency of the signal as relayed back to the accessing station is at a predetermined value or within a predetermined frequency band to obtain the desired transmission timing information without necessitating use of any automatic frequency control means despite any deviation in the central frequency of the signal occurring during its travel.

摘要翻译： 一种用于时分多址（TDMA）通信系统的初始采集技术，采用与TDMA时间帧预定关系周期性地变化的频率的接入信号。 提供了用于检测何时中继回到接入站的信号的频率处于预定值或预定频带内以获得期望的发送定时信息的装置，而不需要使用任何自动频率控制装置，尽管在 信号发生在其行进中的中心频率。