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Data transmission method and system for Ka band downlink

A data transmission method and a downlink technology, which are applied in the Ka-band downlink data transmission method and system field, can solve the problem of inability to obtain delayed CSI, increase data loss, and inability to effectively improve Ka-band space communication data transmission throughput And other issues

Active Publication Date: 2017-11-03
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

In addition, there are also literatures that design a data transmission scheme suitable for independent dual GE channels. Assuming that the total transmission power of the sender is constant, Scheme 1 allocates all the power to a link, and the link that has not obtained power allocation cannot be obtained at the next moment. Delayed CSI, scheme 2 distributes power equally, and each link can obtain delayed CSI at the next moment; on this basis, increase the amount of data loss, and increase the data transmission scheme that does not perform power allocation on both links
[0006] However, the existing Ka-band downlink data transmission scheme cannot effectively improve the data transmission throughput of Ka-band space communication and improve the file transmission efficiency

Method used

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  • Data transmission method and system for Ka band downlink
  • Data transmission method and system for Ka band downlink
  • Data transmission method and system for Ka band downlink

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Embodiment Construction

[0044] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] Specifically, refer to figure 1 , figure 1 It is a schematic flow chart of the Ka frequency band downlink data transmission method of the present invention.

[0046] Such as figure 1 As shown, a preferred embodiment of the present invention proposes a Ka frequency band downlink data transmission method, including:

[0047] Step S1, before the sending end sends data, predict the current channel state of the Ka frequency band downlink by delaying CSI;

[0048] Step S2, according to the current channel state and the pre-created GE channel model in the Ka frequency band, deduce the judgment condition of whether the sensing strategy is needed under the given space communication conditions;

[0049] Wherein, the steps of pre-creating the GE channel model of the Ka frequency band include:

[0050] According to th...

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Abstract

The invention discloses a data transmission method and system for a Ka band downlink. According to the invention, the space information network communication scene is taken into account; the judgment condition of whether the sensing strategy is required or not under the given space communication condition is deduced; the self-adaptive transmission strategy of a single link based on the judgment condition is given; a data transmission scheme to improve the data transmission throughput of two or more Ka band independent downlinks is proposed based on the single downlink; and the adaptive transmission strategy scheme based on the delay CSI is verified under different channel conditions; therefore, the data transmission throughput of the Ka band space communication can be improved effectively, and the file transfer efficiency is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and system for Ka frequency band downlink. Background technique [0002] In future space exploration missions, the use of Ka-band communication is an important method to meet the requirements of high-speed data transmission. Although the Ka frequency band can provide a larger bandwidth and improve the data transmission capacity, its downlink is more susceptible to the influence of ground weather fluctuations, resulting in good and bad channel conditions. Bad weather may cause excessive channel packet loss and cause The communication link is interrupted. The cost of compensating the Ka-band link margin with the precious power resources of space nodes is too high, so the data transmission strategy only for the "bad" state of the channel cannot be adopted, and an adaptive transmission strategy scheme that changes with the channel state shou...

Claims

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Application Information

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IPC IPC(8): H04B17/373H04B17/391H04L1/00
CPCH04L1/0026H04B17/373H04B17/391
Inventor 焦健随新东李晓欣王雨涵吴绍华张钦宇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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