公开(公告)号：US5881154A

公开(公告)日：1999-03-09

申请号：US976007

申请日：1997-11-21

申请人： Mitsuo Nohara ,  Katsuyuki Yamazaki

发明人： Mitsuo Nohara ,  Katsuyuki Yamazaki

IPC分类号： H04L9/34 ,  H04N7/167 ,  H04L9/00

CPC分类号： H04N7/1675 ,  H04L9/065 ,  H04L9/34

摘要： A data scramble transmission system with a data transmission link coupled between sending and receiving ends is provided. The link adopts transmission frames each of which is constituted by data and control bits periodically added to the data. The system includes a scramble unit located at the sending end, for detecting each of the transmission frames of an input signal stream, for interchanging bit-stream positions of data portion in the detected transmission frame in accordance with a predetermined order to produce interchanged signal stream, and for outputting the interchanged signal stream, and a descramble unit located at the receiving end which receives the interchanged signal stream from the sending end, for detecting each of the transmission frames of the received interchanged signal stream, for reinterchanging bit-stream positions of data portion in the detected transmission frame so as to reconstitute the signal stream inputted into the scramble unit at the sending end, and for outputting the reconstituted signal stream.

摘要翻译： 提供了一种在发送和接收端之间耦合数据传输链路的数据加扰传输系统。 链路采用传输帧，每个传输帧由周期性地添加到数据的数据和控制位构成。 该系统包括位于发送端的加扰单元，用于检测输入信号流的每个传输帧，用于根据预定顺序交换检测到的传输帧中的数据部分的比特流位置，以产生互换的信号流 并且用于输出互换的信号流，以及位于接收端的解扰单元，其接收来自发送端的互换信号流，用于检测接收到的互换信号流的每个发送帧，以重新交换位流 数据部分，以便重新配置在发送端输入到加扰单元的信号流，并输出重构的信号流。

公开(公告)号：US4870642A

公开(公告)日：1989-09-26

申请号：US172951

申请日：1988-03-22

申请人： Mitsuo Nohara ,  Fumio Takahata

发明人： Mitsuo Nohara ,  Fumio Takahata

IPC分类号： H04J1/08 ,  H04B7/15 ,  H04B7/208

CPC分类号： H04B7/208

摘要： A demand-assignment communication system is disclosed, in which a plurality of earth stations share a plurality of satellite communication channels in one satellite transponder frequency band, and in which a plurality of carriers with a plurality of transmission frequency bands determined according to transmission rate corresponding to plural kinds of communication circuits of different transmission rates are integrally handled and which, upon occurrence of a call from one of the earth stations to another, assigns to the call a satellite communication channel corresponding to the transmission frequency band necessary therefor. In accordance with the present invention, the frequency slot positions for the satellite communication channels and the order of assignment thereof are determined for each kind of transmission frequency bands necessary for the communication circuits, and each satellite communication channel is assigned to the frequency slot position therefor in the order of its assignment to comply with a request for assignment of one of the satellite communication channels to the call.

摘要翻译： 公开了一种需求分配通信系统，其中多个地球站在一个卫星转发器频带中共享多个卫星通信信道，并且其中具有根据传输速率对应的多个传输频带的多个载波 对于不同传输速率的多种通信电路是整体处理的，并且在从地球站之一发出呼叫时，向呼叫分配对应于其所需的传输频带的卫星通信信道。 根据本发明，为通信电路所需的各种传输频带确定卫星通信信道的频率位置及其分配顺序，并且将每个卫星通信信道分配给其频率位置 按照其分配的顺序来遵守对呼叫中的一个卫星通信信道的分配的请求。

公开(公告)号：US4910792A

公开(公告)日：1990-03-20

申请号：US84244

申请日：1987-08-12

申请人： Fumio Takahata ,  Mitsuo Nohara ,  Yoshio Takeuchi

发明人： Fumio Takahata ,  Mitsuo Nohara ,  Yoshio Takeuchi

IPC分类号： H04B7/15 ,  H04B7/185

CPC分类号： H04B7/18543

摘要： An up-link power from an earth station in a satellite communication system is controlled to compensate rain attenuation caused in an up-link so that the transmission power of the earth station is adjusted according to the difference between the level of a received reference signal, which is sent from a reference earth station to the satellite, and the level of its own received signal which is transmitted to the satellite from itself and is received at its own station after being relayed by the satellite. A transmission power of the reference earth station is adjusted so that the level of the received reference signal at the satellite is constant.

摘要翻译： 控制卫星通信系统中的来自地球站的上行链路功率以补偿上行链路中引起的下降衰减，从而根据接收到的参考信号的电平之间的差异来调整地球站的发射功率， 其从参考地球站发送到卫星，以及其自身的接收信号的电平，其自身被发送到卫星，并且在被卫星中继之后在其本台接收。 调整参考地球站的发射功率，使得卫星接收的参考信号的电平恒定。

公开(公告)号：US4783779A

公开(公告)日：1988-11-08

申请号：US917572

申请日：1986-10-10

申请人： Fumio Takahata ,  Mitsuo Nohara ,  Yasuo Hirata

发明人： Fumio Takahata ,  Mitsuo Nohara ,  Yasuo Hirata

IPC分类号： H04J1/08 ,  H04B7/15 ,  H04B7/208 ,  H04J1/04 ,  H01J9/38

CPC分类号： H04B7/208

摘要： In a frequency division multiple access (FDMA) communication system, a plurality of carrier frequencies relating to a predetermined frequency band for transmitting a PSK (phase shift keying) signal are provided on a frequency scale. When a service is a low bit rate signal, it is transmitted by using a single carrier frequency and its related frequency band. When a service is a high bit rate signal which can not be transmitted in a single carrier signal, the service signal is divided in to a plurality of low bit rate PSK signals, each of which is transmitted by using a single carrier frequency and the related frequency band.

摘要翻译： 在频分多址（FDMA）通信系统中，以频率标度提供与用于发送PSK（相移键控）信号的预定频带相关的多个载波频率。 当服务是低比特率信号时，通过使用单载波频率及其相关频带来发送。 当服务是不能在单个载波信号中传输的高比特率信号时，服务信号被划分为多个低比特率PSK信号，每个低比特率的PSK信号通过使用单载波频率来发送，并且相关 频带。