Experimental study on the passive MIMO transmission
Experimental study on the passive MIMO transmission
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无源MIMO传输实验研究
DOI：
10.1109/apmc.2012.6421815
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
N. Honma
中科院分区：
文献类型：
--
作者：
K. Terasaki;N. Honma
在无源多输入多输出（MIMO）传输方案中，对多天线进行负载调制，可以并行传输多个信号。标签具有由可变电抗终止的多天线。变容二极管用作可变电抗元件。确定了变容二极管的偏置电压，使其对应的反射系数在复数平面上在变容二极管所能承受的范围内相距甚远。本文介绍了在实际室内环境下2 × 2无源MIMO的传输特性。最后阐明了多电平调制的无源MIMO传输可以在不使用标签天线发射机的情况下实现高速数据传输。
In the passive Multiple-Input Multiple-Output (MIMO) transmission scheme, load modulation is applied to the multi-antenna, and a number of signals can be transmitted in parallel. The tag has the multi-antenna terminated by variable reactances. The varactor diodes are used as the variable reactance element. We determine the set of the bias voltage of the varactor diodes so as that its reflection coefficients corresponding to the bias voltages are to be distant each other in complex number plane in the range of the varactor diode can take. This paper describes the characteristics of the 2 × 2 passive MIMO transmission in an actual indoor environment. Finally, we clarify the passive MIMO transmission with multi-level modulation can achieve high-speed data transmission without using the transmitter at the tag antenna.