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MIMO system is a technique known as obtaining the high channel capacity. However, the channel capacity is reduced due to the presence of a direct path. Previous studies have shown that high SNR leads to significant capacity enhancement with high correlation environment [1]. Low correlation can be achieved by use of the orthogonality of the received signals in the LOS environment [2,3,4]. This paper...
In multiple input multiple output (MIMO) systems, antenna selection is an effective method to lead to improvements of the communication performances without increasing number of antenna elements. In this paper, we reveal the antenna selection criterion suitable for indoor LOS scenarios for two-stream MIMO systems. The indoor line-of-sight (LOS) scenarios are constructed by using ray-tracing propagation...
In a handset MIMO (Multiple Input and Multiple Output) antenna, small number of elements and ports are desired. To achieve large channel capacity in above situations, adjustment of radiation patterns is important. We focus on analog techniques, and apply phase difference feeding to a handset MIMO antenna including human body effects. The phase difference is decided and fixed based on MEG (Mean Effective...
In MIMO transmission, efficient communication is provided by beneficial use of radiation pattern and polarization. In this paper, we use a dual-polarized directional MIMO antenna as an indoor base station, and examine about the transmitting antenna selection from four elements to two elements based on measurement data. We show that minimum BER is obtained by the selection maximizing minimum eigenvalue...
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