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    • 1. 发明申请
    • DEVICE FOR CONTROLLING THE FREQUENCY OF A SATELLITE REMOTE-CONTROLLED TRANSMITTER/RECEIVER, AND RELATED TRANSMITTER AND RECEIVER
    • 用于控制卫星遥控发射机/接收机及相关发射机和接收机的频率的装置
    • US20120008664A1
    • 2012-01-12
    • US13256612
    • 2010-03-15
    • Rodolphe NastaThierry Populus
    • Rodolphe NastaThierry Populus
    • H04L25/60
    • H04B7/18519H03J1/0008
    • Device for controlling a frequency F of a TTC satellite link transmitter and/or receiver on the basis of a frequency command whose value is taken in a predetermined frequency plan composed of several frequency notches distributed in a discontinuous manner in a given frequency band, said device including a quartz oscillator delivering a reference frequency FOCXO, a synthesized local oscillator delivering said frequency F on the basis of said reference frequency FOCXO according to a relation F = F OCXO  N R where N and R are programmable divider coefficients, and a digital integrated circuit which implements a conversion table mapping each frequency notch of said predetermined frequency plan to a set of binary addresses distributed in a contiguous manner addressing the values of said coefficients N and R in the form of binary words allowing the synthesized local oscillator to generate said frequency F whose value is equal to that of said frequency command.
    • 用于根据频率指令控制TTC卫星链路发射机和/或接收机的频率F的装置,该频率指令的值以预定的频率方案取得,所述频率指令由在给定频带内以不连续方式分布的多个频率缺口组成,所述装置 包括提供参考频率FOCXO的石英振荡器,根据所述参考频率FOCXO根据关系F = F OCXO NR NR(其中N和R是可编程分频器系数)和数字集成电路来传送所述频率F的合成本地振荡器 其实现将所述预定频率计划的每个频率陷波映射到以连续方式分布的一组二进制地址的转换表,其以二进制字的形式寻址所述系数N和R的值,从而允许合成的本地振荡器产生所述频率F 其值等于所述频率指令的值。
    • 5. 发明授权
    • Satellite with omnidirectional coverage
    • 卫星全向覆盖
    • US06862269B1
    • 2005-03-01
    • US09471281
    • 1999-12-23
    • Rodolphe Nasta
    • Rodolphe Nasta
    • H04B7/216H04Q7/38
    • H04B7/216
    • The invention concerns a satellite having at least two antennas (3, 5) whose radiation patterns overlap, at least in part and means (45; 47, 49, 51) for receiving the sum of the signals from the various antennas. To limit multipath problems when summing signals from the antennas, the invention proposes that the receiver means include means for demodulating a spread spectrum signal and that the absolute difference between the respective transmission times of signals transmitted to the receiver means via two antennas is greater than one chip of the spread spectrum modulation. Application to a satellite TTC (telemetry, tracking and command) link.
    • 本发明涉及具有至少两个天线(3,5)的卫星,其辐射图案至少部分地与用于接收来自各种天线的信号之和的装置(45; 47,49,51)重叠。 为了在从天线求和信号时限制多路径问题,本发明提出接收机装置包括用于解调扩展频谱信号的装置,并且通过两个天线发射到接收机装置的信号的相应传输时间之间的绝对差大于1 芯片的扩频调制。 应用于卫星TTC(遥测,跟踪和指挥)链接。