Satellite-borne Ka-band high-speed data transmission system
A high-speed, frequency-band technology, applied in the field of spaceborne Ka-band high-speed data transmission systems, can solve the problem of inability to meet the large-capacity downlink of satellite loads, and achieve the effect of achieving clutter suppression requirements, accurate access, and improving timeliness
Pending Publication Date: 2022-04-12
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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Problems solved by technology
The traditional data transmission system can no longer meet the transmission requirements of large-capacity downloading of satellite payloads
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[0024] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0026] refer to figure 1 , figure 1 It is a specific system block diagram of a space-borne Ka-band high-speed data transmission system according to an embodiment of the present invention, including a solid-state memory, a data processor, a Ka multi-standard high-speed digital modulator, a traveling wave tube amplifier assembly, a duplexer, and a waveguide switch Matrix and Ka-band gr...
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The invention discloses a satellite-borne Ka-frequency-band high-speed data transmission system which comprises a solid-state memory, a data processor, a Ka multi-standard high-speed digital modulator, a traveling wave tube amplifier assembly, a duplexer, a waveguide switch matrix and a Ka-frequency-band ground data transmission antenna. Spaceborne load data are stored, subjected to rate control, framed, scheduled, encrypted, coded, modulated, subjected to frequency conversion, amplified and filtered and then sent to a ground station through an over-the-ground data transmission antenna. According to the invention, a design thought of combining frequency division multiplexing and polarization multiplexing is adopted, and the transmission quantity of data to the ground is multiplied in unit time. And meanwhile, the characteristic of double-station relay of the two-dimensional rotating antenna is utilized, so that the effective time of satellite-ground link transmission is prolonged. The problems that the transit time of the low-orbit satellite is short and large-capacity load data cannot be transmitted to the ground in real time are solved, the transmission efficiency between satellites and the ground can be effectively improved, and the requirement for the transmission time between the satellites and the ground is lowered.
Description
technical field [0001] The invention relates to a system design for satellite on-orbit satellite-to-ground transmission, in particular to a high-speed data transmission system in the Ka frequency band carried by a satellite. Background technique [0002] With the continuous development of the satellite field, the types of satellite payloads and the amount of data are increasing day by day, and the pressure on downlink data transmission is also increasing. In order to download the data collected and processed by the load to the ground, the satellite needs to establish a transmission link with the ground station. However, due to the limitation of the orbital height of the low-orbit satellite, the visible range of each track passing through the ground station is not the same as the satellite-to-ground link that can be built. The time available for data transmission is limited. In order to ensure the timeliness of satellite data transmission to the ground, the download of each ...
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IPC IPC(8): H04B7/185H04L27/26
Inventor 华伊郝广凯李世建魏祎刘聚张风源杨宇涛李科
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM