RELAY SATELLITE AND SATELLITE COMMUNICATION SYSTEM
First Claim
1. A relay satellite, comprising:
- a plurality of reception antennas;
a plurality of reception processing units;
a plurality of transmission processing units;
a plurality of transmission antennas;
a first switch unit that outputs a signal received by each of the plurality of reception antennas to one or more of the reception processing units;
a second switch unit that outputs a digital reception signal obtained by reception processing performed by each of the plurality of reception processing units to one or more of the transmission processing units; and
a third switch unit that outputs an analog signal obtained by transmission processing performed by each of the plurality of transmission processing units to one of the transmission antennas,wherein when a reception signal having a band broader than a band processable by the reception processing unit is inputted, the first switch unit outputs the broadband reception signal to the plurality of reception processing units, andwhen a signal having a band broader than a band processable by the reception processing unit is inputted, the reception processing unit performs reception processing on a part of the band of the input signal.
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Accused Products
Abstract
A relay satellite includes reception antennas, reception processing units, transmission processing units, transmission antennas, a reception analog switch matrix unit that outputs a signal received by the reception antenna to one or more of the reception processing units, a digital switch matrix unit that outputs digital reception signals obtained by reception processing performed by the reception processing units to one or more of the transmission processing units, and a transmission analog switch matrix unit that outputs analog signals obtained by transmission processing performed by the transmission processing units to one of the transmission antennas. The reception analog switch matrix unit outputs a broadband reception signal to the reception processing units when a reception signal having a band broader than a band processable by the reception processing unit is inputted, and the reception processing unit performs reception processing on a part of a band when the broadband signal is inputted.
38 Citations
16 Claims
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1. A relay satellite, comprising:
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a plurality of reception antennas; a plurality of reception processing units; a plurality of transmission processing units; a plurality of transmission antennas; a first switch unit that outputs a signal received by each of the plurality of reception antennas to one or more of the reception processing units; a second switch unit that outputs a digital reception signal obtained by reception processing performed by each of the plurality of reception processing units to one or more of the transmission processing units; and a third switch unit that outputs an analog signal obtained by transmission processing performed by each of the plurality of transmission processing units to one of the transmission antennas, wherein when a reception signal having a band broader than a band processable by the reception processing unit is inputted, the first switch unit outputs the broadband reception signal to the plurality of reception processing units, and when a signal having a band broader than a band processable by the reception processing unit is inputted, the reception processing unit performs reception processing on a part of the band of the input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16)
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10. A relay satellite, comprising:
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a plurality of reception antennas that form a plurality of reception beams based on beam foaming; a plurality of reception processing units; a plurality of transmission processing units; a plurality of transmission antennas that form a plurality of transmission beams based on beam foaming; a first switch unit that outputs a signal received by each of the plurality of reception antennas to one or more of the reception processing units; a plurality of reception signal synthesizing units that synthesize digital reception signals having identical components among a plurality of digital reception signals obtained by reception processing performed by the plurality of reception processing units; a plurality of demultiplexing units that correspond to the plurality of reception signal synthesizing units in a one-to-one manner, and demultiplex a signal outputted from a corresponding reception signal synthesizing unit into a plurality of signals; a second switch unit that allocates each signal obtained by the demultiplex by the demultiplexing unit to one or more of the transmission antennas; a plurality of multiplexing units that multiplex signals allocated to the same transmission antenna by the second switch unit; a distributing unit that distributes signals outputted from the plurality of multiplexing units to two or more of the plurality of transmission processing units; and a third switch unit that outputs analog signals generated based on the same component among analog signals obtained by transmission processing performed by the plurality of transmission processing units to different transmission antennas that form the same transmission beam, wherein when a reception signal having a band broader than a band processable by the reception processing unit is inputted, the first switch unit outputs the broadband reception signal to the plurality of reception processing units, and when a signal having a band broader than a band processable by the reception processing unit is inputted, the reception processing unit performs reception processing on a part of the band of the input signal.
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Specification