arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.11144eess.SP
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多卫星多用户MIMO预编码:试验床和现场试验

Multi-Satellite Multi-User MIMO Precoding: Testbed and Field Trial

Kai-Uwe Storek, Robert T. Schwarz, Andreas Knopp

摘要:

针对多用户多输入多输出(MU-MIMO)下行链路场景中具有全频率重用的多波束卫星系统的预编码。开发了一个测试平台,用于在两个协同定位的地球同步卫星上对两个独立的视频流进行空间复用的迫零预编码的空中现场试验。两个单天线用户终端(UT)中的商用现成DVB-S2 x接收器可成功解码两个独立的视频流。为此,特别注意的是支付给一个全面的评估基于预编码的MU-MIMO系统的实际同步任务。特别是,载波频率恢复和载波相位同步在最具挑战性的多卫星的情况下,不同的振荡器的有效载荷进行。提出并实现了一种信道状态信息(CSI)即复信道系数的估计方法。成功的视频传输最终构成了MU-MIMO预编码的首次现场试验,并证明了多波束卫星系统预编码概念的可行性。

英文摘要:

Precoding for multibeam satellite systems with full frequency reuse in a multi-user multiple-input multiple-output (MU-MIMO) downlink scenario is addressed. A testbed is developed to perform an over-the-air field trial of zero forcing precoding for the spatial multiplexing of two separate video streams over two co-located geostationary satellites. Commercial-off-the-shelf DVB-S2x receivers in two single-antenna user terminals (UTs) are operated to successfully decode two independent video streams. To this end, particular attention is paid to a comprehensive assessment of the practical synchronization tasks of a precoding based MU-MIMO system. In particular, carrier frequency recovery and carrier phase synchronization in the most challenging multi-satellite scenario with different oscillators in the payloads is performed. An estimation method for channel state information (CSI), i.e. the complex channel coefficients, is also proposed and implemented. The successful video transmission finally constitutes the first field trial of MU-MIMO precoding and proves the feasibility of precoding concepts for multibeam satellite systems.

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