Ground verification method of performance of double-circle polarized multiplexed satellite-borne data transmission antenna
A dual circular polarization multiplexing and data transmission antenna technology, applied in the field of satellite large-scale system testing, can solve the problems of shaped antenna beam width, inability to quantitatively measure satellite-ground joint polarization discrimination rate, link margin performance indicators, etc. , to reduce the risk
Active Publication Date: 2013-07-24
BEIJING INST OF SPACECRAFT SYST ENG
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During the wireless docking test between the satellite and the ground receiving station, only qualitative verification of the link status is carried out, and performance indicators
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[0047] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0048] as attached figure 1 As shown, the present invention provides a ground verification method for the performance of a dual circular polarization multiplexed spaceborne digital transmission antenna, and the test system adopted by the ground verification method includes a satellite system and a ground system;
[0049] In the satellite system, modulator a and modulator b receive two pseudo-random codes sent by PN code generator a and PN code generator b respectively, and modulate them to form two radio frequency signals; two radio frequency signals The power attenuation is performed by attenuator a and attenuator b respectively, and the attenuation is adjustable. The output signals of attenuator a and attenuator b are respectively input as channel 1 and channel 2 signals to the satellite-borne dual circular polarization multiplexing data transmission ant...
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The invention provides a ground verification method of the performance of a double-circle polarized multiplexed satellite-borne data transmission antenna. A testing system used by the ground verification method comprises a satellite system and a ground system. The ground verification method comprises the following steps: first, the decrement of an attenuator is calculated according to the distance between a satellite system and a ground system and the actual working condition of a satellite in an orbit; mutual directing and aiming are conducted on the satellite-borne double-circle polarized multiplexed data transmission antenna and a ground receiving antenna; a ground verification simulation test is conducted, the satellite and ground combination polarization detectability of a channel one and a channel two and the link margin of the channel one and the channel two are measured, the directing angle of the satellite-borne double-circle polarized multiplexed data transmission antenna and the directing angle of the ground receiving antenna are pulled to be slanting, the satellite and ground combination polarization detectability and the link margin are measured when the directing angles are pulled to be slanting, and further an antenna directing accuracy which meets the demands of a link can be measured. According to the ground verification method of the performance of the double-circle polarized multiplexed satellite-borne data transmission antenna, comprehensive ground verification to the double-circle polarized multiplexed satellite-borne data transmission antenna can be achieved, a basis is provided for in-orbit operation, and risks of the in-orbit operation are reduced.
Description
technical field [0001] The invention relates to a ground verification method, in particular to a ground verification method for the performance of a dual-circular polarization multiplexed satellite-borne digital transmission antenna, and belongs to the technical field of satellite large-scale system testing. Background technique [0002] With the continuous improvement of remote sensing satellite technology and the continuous growth of user needs, the data volume of satellite payloads has increased significantly. For the currently widely used X-band satellite-ground data transmission system, the available bandwidth specified by ITU is only 375MHz within the range of 8025MHz to 8400MHz. In order to make the transmission of payload data meet the restrictions of this regulation, some new remote sensing satellites have proposed the use of dual circular polarization frequency multiplexing data transmission technology. Dual circular polarization frequency multiplexing technology ...
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Inventor 黄缙张莎莎李少辉刘希刚张新伟
Owner BEIJING INST OF SPACECRAFT SYST ENG
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