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arXiv 1901.01657eess.SPcs.ITmath.IT
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多波束卫星通信中能量有效性的预编码设计

Precoding Design for Energy Efficiency of Multibeam Satellite Communications

Chenhao Qi, Xin Wang

摘要:

由于卫星的功率约束,提高能量效率(EE)而不是仅仅提高频谱效率(SE)是多波束卫星系统的另一个重要关注点。然而,到目前为止,还没有详细的预编码设计的多波束卫星的EE。在这项工作中,EE最大化问题的多波束卫星系统下的总功率约束以及服务质量(QoS)的约束。分别给出了基于迫零(ZF)和基于序贯凸逼近(SCA)的预编码设计算法。特别地,这些算法被多波束卫星系统的实测信道数据所验证。数值结果表明,基于SCA的预编码算法优于基于ZF的预编码算法。研究还表明,单纯提高卫星功率并不能提高能效,降低卫星功率是提高能效的有效途径。

英文摘要:

Instead of merely improving the spectral efficiency (SE), improving the energy efficiency (EE) is another important concern for multibeam satellite systems, due to the power constraint of satellites. However, so far there has been no detailed work on the precoding design concerning the EE for multibeam satellite. In this work, the EE maximization problem is investigated for multibeam satellite systems under the total power constraint as well as the quality of service (QoS) constraints. Precoding design algorithms based on zero forcing (ZF) and sequential convex approximation (SCA) are presented respectively. In particular, these algorithms are verified by the real measured channel data of multibeam satellite systems. Numerical results show that the precoding algorithm based on SCA outperforms that based on ZF. It is also implied that the EE cannot be always improved by solely increasing the power of the satellite, while reducing the satellite operation power is an effective way for the EE improvement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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