基于非理想信道状态信息的高通量卫星预编码算法

doi:10.11959/j.issn.2096-8930.2023008

Abstract

Abstract:

In order to suppress co-channel interference caused by frequency reuse, high-throughput satellite communication systems have begun to study ground interference suppression technologies, including multi-user detection technology applied in the reverse link and precoding technology applied in the forward link.A forward link model was established that took into account the eff ects of free space loss, rain attenuation, and beam gain.Based on the non-ideal channel state information model, the minimum mean square error precoding algorithm was improved, and an improved minimum mean square error precoding algorithm suitable for non-ideal channel state information was proposed.The satellite precoding algorithm considered adopted a more accurate channel model with irrational channel information, and incorporated the non-ideal channel state information into the precoding algorithm and eliminated it.The simulation results showed that the high-throughput satellite precoding algorithm could signifi cantly improved the throughput of the system under the condition of non-ideal channel state information, and also improved the robustness of the system.

Key words: high-throughput satellite, precoding technology, non-ideal channel state information, minimum mean square error precoding

CLC Number:

TN393

Yingzhe DOU, Guanchang XUE, Mingchuan YANG. High-Throughput Satellite Precoding Algorithm Based on Non-Ideal Channel State Information[J]. Space-Integrated-Ground Information Networks, 2023, 4(1): 66-72.

Figures/Tables 5

References 26

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参数	参数值
载波频率/Hz	20
轨道高度/km	35 786
波束半径/km	190
波束3 dB角度/(°)	0.4
降雨衰减均值/dB	0.6
最大天线发射增益/dBi	50
降雨衰减方差/dB	1
用户终端接收增益/dBi	41.7
用户链路带宽/MHz	500
接收机噪声温度/K	207
前向链路自由空间损耗/dB	210
最大发射功率/W	80

High-Throughput Satellite Precoding Algorithm Based on Non-Ideal Channel State Information

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