Multiple-Input Multiple-Output (MIMO) Prototyping System

今天，有超过200亿台设备连接到互联网。在未来三年内，这一数字将增加100亿台设备。无线通信的份额显著增加，并且对蜂窝移动的网络提出了一个有趣的和经济上重要的挑战，即在干扰受限的环境中以有限的资源支持具有增加的数据速率的终端。多天线系统，即所谓的多输入多输出（MIMO）系统，通过分集提高频谱效率，允许空间复用，并降低中断概率。此外，诸如非正交多址（NOMA）和在网络中的某些节点处的数据缓存的新技术允许进一步提高频谱效率和吞吐量。通过MIMO原型系统，可以容易地改变协议栈的两个最低层，即物理层和介质访问控制层，并且可以适应用于资源分配、功率控制以及空间和频谱预编码的新算法。甚至可以说明和评估具有分布式发送和接收节点的复杂多小区场景。MIMO原型系统允许通信技术研究所进行整个开发过程，从算法分析和开发资源分配和分配到原型系统的实施和评估。MIMO原型系统将应用于以下研究领域：下行链路的多用户波束形成概念，下行链路的协作多点技术，无线指纹和分布的验证和确认，任意变化信道的对称性验证。最后，我们期望从MIMO原型系统的实施的经验和结果，开发新的理论方法和问题，然后在系统上实现和测试。

Today there exist over 20 billion devices connected to the internet. In the coming three years, the number will increase by 10 billion more devices. The share of wireless communication is significantly increasing and rises an interesting and economic important challenge for the cellular mobile networks to support terminals with increasing data rates with limited resources in interference-limited environments. Multiple antenna systems, so called multiple-input multiple-output (MIMO) systems increase the spectral efficiency, allow spatial multiplexing, and decrease the outage probability by diversity. Furthermore, new technologies such as non-orthogonal multiple-access (NOMA) and caching of data at certain nodes in the network allow to improve the spectral efficiency and throughput further. By the MIMO prototyping system the two lowest layers of the protocol stack, the physical and the medium access control layer can be easily changed and novel algorithms for resource allocation, power control and spatial and spectral precoding can be adapted. Even complex multi-cell scenarios with distributed transmit and receive nodes can be illustrated and evaluated. The MIMO prototyping system allows the Institute of Communications Technology to proceed with the whole development process from algorithm analysis and development for resource allocation and assignment to the implementation and assessment on the prototype system. The MIMO prototyping system will be applied for the following research areas: multi-user beam forming concepts for the downlink, cooperative multipoint techniques for downlink, metrological verification and validation of wireless finger prints and distributions, verification of symmetrizability of arbitrary varying channels. Finally, we expect from the experiences and results of the implementations on the MIMO prototyping system to develop novel theoretical approaches and questions, which then are implemented and tested on the system.