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    Repeaters for multibeam satellites with channels divided in subchannels and interbeam switching
    1.
    发明公开
    Repeaters for multibeam satellites with channels divided in subchannels and interbeam switching 失效
    对于卫星多波束天线信道的中继器被分成子信道和光束开关

    公开(公告)号：EP0760561A2

    公开(公告)日：1997-03-05

    申请号：EP96113034.1

    申请日：1996-08-13

    Applicant: COM DEV LTD.

    Inventor： Peach, Robert ,  Miller, Nigel ,  Tailor, Bharat ,  Ali, Kamal ,  Beauchamp, Gary ,  Lam, Simon ,  Lazaris-Brunner, Ken

    IPC: H04B7/204

    CPC classification number: H04B7/2041

    Abstract: A repeater for a multibeam communications satellite combines the features of coaxial channel interbeam switching and subchannelization of some of the channels. In one embodiment described, the input radio-frequency signals from the input beams are fed through the input multiplexers to form channels. Some, but not all, channels are subsequently subchannelized for interbeam switching. In another embodiment of the invention, a portion of the incoming radio frequency signals bypasses the input demultiplexer and is filtered for noise-limiting reasons, converted down to an intermediate frequency and then subchannelized using SAW filters. The specification also teaches that digital techniques can be used to obtain the same results. Especially in the case of satellites with a large number of beams and a large number of channels, it is not necessary to have full interbeam switching of all the subchannels derived from one channel: instead, the specification proposes the use of parallel configurations of smaller, less complex switching networks.

    Abstract translation: 一种用于多波束卫星通信转发器结合了的一些通道同轴信道的波束间切换和子信道的特性。 在一个实施例中所描述的，从输入光束的输入射频信号通过多路转换器输入进料，以形成通道。 一些，但不是全部，信道随后用于subchannelized波束间切换。 在本发明的另一个实施例，输入的射频信号的一部分绕过所述输入多路分解，并过滤噪声限制性原因，转换至在中频，然后使用SAW滤波器subchannelized。 因此，规范教技术做数字可以用来获得相同的结果。 尤其是在具有大数量的光束和大量的信道的卫星的情况下，这是没有必要为具有从一个信道导出的所有子信道的全梁间切换：代替，本说明书提出了使用更小的平行构型， 较不复杂的交换网络。

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