New Approaches to Highly Bandwidth-Efficient Satellite Communications

高带宽效率卫星通信的新方法

基本信息

项目摘要

Due to substantially increasing demand for data transmission, satellite communications systems are facing capacity limits. The approaches to satisfy the demands have to be substantially different from the approaches used in terrestrial systems due to severe limitations in terms of signal processing possibilities and power consumption at the satellites. Moreover, the operations at the satellite should be simple and transparent as a satellite is designed to stay in the orbit for about 15 years without easy update and repair possibilities. Therefore, the satellite community mainly adopts conventional approaches. Increase in terms of bandwidth efficiency is typically addressed by higher order modulation schemes (APSK) and pulse shaping with reduced excess bandwidth. Nevertheless, less conventional approaches seem to be more promising to achieve high bandwidth-efficiency under the strict restrictions of satellite systems. In the proposed project, we intend to adopt two unconventional approaches: Multiple-input multiple-output (MIMO) transmission, which is well established in terrestrial networks but unusual in satellite networks due to the common line-of-sight channel conditions. The second approach is Faster-Than-Nyquist signaling, where the bandwidth-efficiency is increased using low-order modulation by violating the first Nyquist condition. Combining both approaches, we will design and evaluate transmission strategies for the unconventional application in satellite scenarios. We intend to make a step forward in answering the fundamental question: Can MIMO and Faster-Than-Nyquist signaling be considered as suitable, innovative and superior alternatives to increase the spectral efficiency of satellite communications systems ?
由于对数据传输的需求大幅增加,卫星通信系统正面临容量限制。由于卫星在信号处理能力和功率消耗方面的严重限制,满足这些要求的方法必须与地面系统中使用的方法有很大不同。此外,卫星的操作应该简单和透明,因为卫星的设计是在轨道上停留大约15年,不会有容易更新和维修的可能性。因此,卫星界主要采用常规方式。带宽效率的提高通常通过高阶调制方案(APSK)和具有减少的过剩带宽的脉冲整形来解决。然而,在卫星系统的严格限制下,非常规方法似乎更有希望实现高带宽效率。在提出的项目中,我们打算采用两种非传统的方法:多输入多输出(MIMO)传输,这种传输在地面网络中已经很好地建立了,但在卫星网络中由于共同的视距信道条件而不常见。第二种方法是比奈奎斯特信令更快,其中通过违反第一奈奎斯特条件使用低阶调制来提高带宽效率。结合这两种方法,我们将针对卫星场景中的非常规应用设计和评估传输策略。我们打算在回答基本问题方面向前迈进一步:MIMO和比奈奎斯特更快的信令是否可以被视为提高卫星通信系统频谱效率的合适、创新和优越的替代方案?

项目成果

期刊论文数量(0)
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Professor Dr.-Ing. Gerhard Bauch其他文献

Professor Dr.-Ing. Gerhard Bauch的其他文献

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{{ truncateString('Professor Dr.-Ing. Gerhard Bauch', 18)}}的其他基金

Robust Interference Alignment in Satellite Networks
卫星网络中的鲁棒干扰对准
  • 批准号:
    207427512
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
MIMO Satellite Communications: A New Application of Multi-Antenna Technologies and Network Coding under Line-of-Sight Conditions
MIMO卫星通信:视距条件下多天线技术和网络编码的新应用
  • 批准号:
    160156061
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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