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认知无线电策略与MODCOD技术相结合,以减轻低轨道卫星下载链路的干扰

Rodolfo Araujo¹, Luciano da Silva¹, Walter Santos²

¹Division of Space Electronics and Computing, National Institute for Space Research, São José dos Campos 12227-010, SP, Brazil.

Sensors (Basel, Switzerland)

|August 26, 2023

概括

认知无线电和自适应调制技术减轻了卫星下链的干扰. 这种综合方法提高了对地球观测数据接收的频谱效率,确保了更清晰的图像.

科学领域:

无线通信无线通信
卫星技术卫星技术卫星技术
信号处理信号处理

背景情况:

共享的卫星-地面网络面临着光谱共存的挑战,特别是对于需要高光谱效率的地球勘探卫星服务.
来自蜂基站的干扰会影响运载关键成像数据的低轨道卫星下线链路.
优化频谱利用对于可靠的卫星数据接收至关重要.

研究的目的:

为了减轻用于地球观测成像的低轨道卫星下载链路的干扰.
提高卫星通信系统的频谱利用和射频功率效率.
提出和验证一种结合了认知无线电和自适应调制和编码的方法.

主要方法:

实施认知无线电 (CR) 方法,以加强频谱管理.
引入了自适应调制和编码 (AMC),以提高射频功率和光谱效率.
开发了一种结合CR和AMC的方法,监测信号与干扰加噪声比和AMC策略.

主要成果:

成功地减轻了对接收的地球观测卫星图像的有害干扰效应.
在现实场景中证明了联合CR和AMC方法的有效性.
通过在Cuiabá地面站的现场案例研究和实验室测试模拟来验证解决方案.

结论:

拟议的综合认知无线电和自适应调制和编码方法有效地提高了频谱利用,并减轻了干扰.
这种方法提高了地球观测卫星下链传输的可靠性和效率.
该研究提供了一种实际的解决方案,以改善卫星数据接收质量,在存在地面干扰的情况下.

关键词:

这就是MODCOD的代码.认知无线电是一种认知无线电.下行链路的吞吐量下行链路的吞吐量低轨道卫星低轨道卫星频谱共存是一种共存.

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