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Massive multiple input and multiple output (MIMO) systems can increase the spectrum and energy efficiency of existing cells, and because of this, massive MIMO has been considered as a potential technique for next generation wireless communication networks. Since a thorough knowledge of the propagation channel is a prerequisite of reliable communication systems, massive MIMO channels are of great current...
In this paper, the verification of using angle domain processing for Multiple Input Multiple Output (MIMO) system is presented. This paper proposes the concept of angle domain processing by applying a Butler matrix into 4 ?? 4 MIMO systems. A butler matrix is the most attractive technique for constructing angle domain due to its low cost and easy to implement. The measured results are compared with...
This paper presents measurement of 4times4 MIMO channel by using polarization diversity technique at 2.4 GHz. The measurement was carried out in indoor wireless environment and line-of-sight (LOS) condition. A linear polarization antenna was used at the transmitter (Tx) and receiver (Rx) with a distance of 3 meters. The results were compared with power correlation coefficient of different polarization...
Recently, MIMO techniques have been using in active radars,and become a hot topic in radar field, where they improve the performance of detection and parameters estimation greatly. On estimates of direction-of-arrival (DOA) in active radars, generally elements of the receive array were closely spaced to enable direction finding measurements. However, in order to obtain angular diversity, all elements...
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