Evaluation of Distributed MIMO Communication Using a Low-Complexity Sigma-Delta-over-Fiber Testbed
Evaluation of Distributed MIMO Communication Using a Low-Complexity Sigma-Delta-over-Fiber Testbed
复制标题
使用低复杂度光纤 Sigma-Delta 测试台评估分布式 MIMO 通信
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
C. Fager
中科院分区：
文献类型：
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作者：
I. Sezgin;T. Eriksson;J. Gustavsson;C. Fager
分配基站的天线是一种增加传统的共址MIMO通信系统的覆盖和容量的方法。然而，物理上分离的天线/接入点(AP)带来了分布式MIMO(D-MIMO)系统中联合/协调传输所需的RF相位同步的根本挑战。在这篇文章中，我们使用一个完全同步的、低复杂度的、基于光纤增量传输(SDoF)的12通道实验台，通过不同的测量来比较共址MIMO和分布式MIMO无线通信。在实验室环境中进行单用户和多用户测量，并计算误差向量幅度(EVM)、接收功率和信干比(SIR)。我们发现，通过分配接入点，接收符号的EVM最高可提高1.6db，并且通过提供更均匀的接收功率电平来增加服务区域的覆盖。
Distributing the antennas of a base station is a method to increase the coverage and the capacity of a conventional, co-located MIMO communication system. However, physically separated antennas/access points (AP) creates a fundamental challenge of RF phase synchronization required for joint/coordinated transmission in distributed MIMO (D-MIMO) systems. In this paper we compare co-located-and distributed-MIMO wireless communication thru various measurements using a fully synchronized, low-complexity, twelve-channel testbed based on sigma-delta-over-fiber (SDoF). Single and multi-user measurements are performed in a laboratory environment and the error-vector-magnitude (EVM), the received power and signal-to-interference ratio (SIR) is calculated. We show that distributing the access points improves the received symbol EVM up to 1.6-dB and increases the coverage of the service area by delivering more uniform received power levels.