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    • 1. 发明申请
    • IMPROVEMENT TO SS-TDMA TECHNIQUE TELECOMMUNICATION SATELLITE SYSTEMS
    • 改进SS-TDMA技术电信卫星系统
    • WO1986007512A1
    • 1986-12-18
    • PCT/IT1986000041
    • 1986-06-05
    • SELENIA SPAZIO, S.P.A.PERROTTA, Giorgio
    • SELENIA SPAZIO, S.P.A.
    • H04B07/185
    • H04B7/2125
    • Improvement to satellite telecommunication systems using SS-TDMA (Satellite Switched Time Domain Multiple Access) technique equipped with on board regenerative repeaters consisting of: 1. Transmitting from ground to the satellite a signal (CM) with high frequency stability and in harmonic relationship with digital data rate by modulating the carrier sent by a beacon station for fine tracking of on-board antennas. The signal (CM) being synchronised to the plesiochronous clock (CPL) common to all ground stations is used for: a. on board bit re-synchronization of the data stream after demodulation and re-generation on board of the asynchronous data arriving at the satellite; b. synchronization of reference words related to start of frames sent by the satellite. 2. Modulating the signal CM with digital signals, to be used as high speed telecommand which operate in a totally independent way of the telecommand system usually adopted for satellite control.
    • 使用配备有机载再生中继器的SS-TDMA(卫星交换时域多址)技术对卫星电信系统的改进,包括:1.从地面向卫星发送具有高频稳定性和数字谐波关系的信号(CM) 通过调制由信标站发送的用于车载天线的精细跟踪的载波的数据速率。 与所有地面站通用的同步时钟(CPL)同步的信号(CM)用于:a。 在解调和重新生成到达卫星的异步数据的基板上进行数据流的重新同步; 湾 与卫星发送的帧开始相关的参考字的同步。 2.用数字信号调制信号CM,用作高速遥控器,以与通常用于卫星控制的遥控系统完全独立的方式工作。
    • 3. 发明授权
    • Concatenated code-decode system for the protection against interference
of digital transmissions through an intermediate regenerative repeater
    • 用于通过中间再生中继器防止数字传输干扰的连续码解码系统
    • US4800570A
    • 1989-01-24
    • US44888
    • 1987-04-30
    • Giorgio PerrottaGiacinto Losquadro
    • Giorgio PerrottaGiacinto Losquadro
    • H03M13/29H03K11/00
    • H03M13/29
    • A digital signal to be transmitted (TXSG) is encoded through an external code device (EXCD); digital signal TXSG' so obtained (with a bit rate greater than TXSG) is used to modulate, through modulator MOD 1, a transmission carrier later amplified by transmitter TEQ 1 and radiated by antenna ANT1. The RF carrier sent by the transmitter is received by an intermediate transponder through antenna ANT2, receiver REQ2 and demodulator DEM1, which reconstitutes signal TXSG', save for transmission errors. The signal so received is once again encoded by internal coder INCD, obtaining a new digital signal TXSG", which has a bit rate even higher than TXSG'. This TXSG" signal is then used to modulate a second RF carrier by means of MOD2 modulator. The resulting signal is amplified by TEQ2 and radiated by antenna ANT3.The RF signal sent by the transponder is received by the receiver terminal through ANT4 and, through receiver (REQ2) and demodulation (DEM2) units, a RXSG" signal is rebuilt, coinciding, save for transmission errors, with signal TXSG". Such signal is decoded by internal decoder INDC, thereby obtaining a signal RXSG' which, save for transmission errors, coincides with signal TXSG'.This last signal is decoded by external decoder EXDC so as to rebuild signal RXSG which, save for transmission errors, coincides with transmitted signal TXSG.
    • 要发送的数字信号(TXSG)通过外部编码装置(EXCD)进行编码; 如此获得的数字信号TXSG'(比特率大于TXSG)用于通过调制器MOD 1调制由发射机TEQ 1随后放大并由天线ANT1辐射的传输载波。 由发射机发送的RF载波由中间转发器通过天线ANT2,接收机REQ2和解调器DEM1接收,其重构信号TXSG',保存传输错误。 如此接收的信号再次由内部编码器INCD编码,获得具有甚至高于TXSG'的比特率的新数字信号TXSG“。 该TXSG“信号然后用于通过MOD2调制器来调制第二RF载波。 所得信号由TEQ2放大并由天线ANT3辐射。 应答器发送的RF信号由接收机终端通过ANT4接收,并且通过接收机(REQ2)和解调(DEM2)单元,RXSG“信号被重建,与信号TXSG”一致,保存传输错误。 这样的信号由内部解码器INDC解码,从而获得信号RXSG',其除了传输错误与信号TXSG'一致。 该最后一个信号由外部解码器EXDC解码,以重建信号RXSG,其中传输错误与发送信号TXSG保持一致。
    • 4. 发明授权
    • Fine pointing system for reflector type antennas
    • 用于反射器类型天线的精细点标系统
    • US5229781A
    • 1993-07-20
    • US677625
    • 1991-03-28
    • Giacinto LosquadroMario Falconi
    • Giacinto LosquadroMario Falconi
    • H01Q1/12H01Q3/20
    • H01Q3/20H01Q1/125
    • A pointing system for reflector type antennas providing a high degree of accuracy with low loss over wide scan areas, including a fixed illuminator retained in fixed position at the focal point of the reflector of the antenna. Surrounding the illuminator is a Cardanic joint which acts as a spherical hinge capable of radial rotation around the illuminator. Attached to the Cardanic joint is a support arm which is connected to the reflector. The reflector is therefore freely movable in a spherical path defined around the illuminator with the illuminator coinciding with the center of the sphere. The illuminator is kept within the focal point of the reflector regardless of the position of the reflector as it spherically rotates around the illuminator. Tension springs in the Cardanic joint and guide wires controlled by motors are provided for finely positioning the support arm and reflector in any given position along the spherical rotative path through which the reflector is able to move. The beam axis of the antenna is continuously variable through the complete range of motion of the reflector, and therefore the antenna system is capable of scanning over large areas. The fine positioning of the reflector and the lack of need for articulated connectors to the feed of the antenna provide for low loss and high pointing accuracy.
    • 6. 发明授权
    • On-board switching controller for a satellite with on-board switching
    • 车载切换控制器,用于带有车载切换的卫星
    • US4926422A
    • 1990-05-15
    • US267492
    • 1988-11-04
    • Gian B. AlariaCesare PoggioGiovanni Ventimiglia
    • Gian B. AlariaCesare PoggioGiovanni Ventimiglia
    • H04B7/204
    • H04B7/2046
    • A controller is provided for a baseband switching matrix with one space switching stage. The matrix supplies the controller with a number of service channels (IOTS, CH) of the uplink frames, which channels comprise encoded commands that are decoded by the controller which generates service channels (IOTD, FMC) for the downlink frames and sends them towards the matrix. The controller is subdivided into three functional units: a preprocessing unit (PREL) which decodes uplink frame service channels; a processing unit (ELAB), which receives the commands decoded by the preprocessing unit and/or by a telecontrol station with which it performs a bidirectional dialogue and generates control signals comprising the matrix switching states; and an interface unit (INTM) comprising two memories (MEMA, MEMB) alternatively operating as active or backup memory, which store the switching states supplied by the processing unit and send them to the matrix.
    • 为具有一个空间切换级的基带切换矩阵提供控制器。 矩阵向控制器提供上行链路帧的多个服务信道(IOTS,CH),这些信道包括由控制器解码的编码命令,该控制器为下行链路帧生成服务信道(IOTD,FMC),并向 矩阵。 控制器被细分为三个功能单元:对上行帧服务信道进行解码的预处理单元(PREL); 处理单元(ELAB),其接收由预处理单元解码的命令和/或通过遥控站进行双向对话并产生包括矩阵切换状态的控制信号; 以及包括交替地作为活动或备用存储器操作的两个存储器(MEMA,MEMB)的接口单元(INTM),其存储由处理单元提供的切换状态并将其发送到矩阵。
    • 7. 发明授权
    • Satellite antenna tracking system
    • 卫星天线跟踪系统
    • US5194874A
    • 1993-03-16
    • US677623
    • 1991-03-28
    • Giorgio Perrotta
    • Giorgio Perrotta
    • G01S3/58H01Q3/10
    • H01Q3/10G01S3/58
    • An integrated antenna system for signal error tracking and correction capable of performing a mechanical conical scan. The mechanical conical scan imposes a modulation upon a received RF signal. This modulation is in turn imposed on an AGC circuit in the receiver of the antenna system, which modulates the AGC signal of the receiver in accord with the modulation imposed on the RF signal by the conical scan. This modulated AGC signal is compared in a detector circuit to a reference sinusoidal signal generated by a local oscillator in the system. This detector circuit outputs an error signal which is added to a reference sinusoidal signal which in combination drive an actuator. This actuator is responsible for imparting nutative motion to the antenna, for the purposes of producing the conical scan pattern. The error detection and correction which result from the conical scan and the error detection circuitry, are capable of operating at multiple RF frequencies and modulation schemes, since the error signal of the system is generated by a modulated AGC signal as opposed to the modulated RF signal itself.