Abstract
This article discusses possible bandwidth limitations of a radio access channel using MIMO technology with polarization-orthogonal channels, or dual polarization channels. The main attention is paid to the presence of cross-polarization isolation between channels, or cross-polarization relation, or Cross Polar Discrimination. The indicated ratio is determined mainly by the design features of the antennas. It is proposed to choose antennas with the minimum required values of cross-polarization ratio, which limit a given channel bandwidth.
Highlights
IntroductionThe problem is the effect of cross-polarization isolation on the polarization of the multiple-input and multiple-output (MIMO) antennas on the bandwidth of the radio channel
multiple-input and multiple-output (MIMO) technology has become an essential element of wireless communication standards including IEEE 802.11n (Wi-Fi), IEEE 802.11ac (Wi-Fi), HSPA+ (3G), WiMAX (4G), and Long Term Evolution (4G LTE)
Shannon-Hartley’s channel capacity theorem is applied to provide the upper bound of the data rate given a certain bandwidth and signal to noise ratio (SNR)
Summary
The problem is the effect of cross-polarization isolation on the polarization of the MIMO antennas on the bandwidth of the radio channel. The subject of research is MIMO-technologies with polarization-orthogonal channels for mobile and fixed communication systems of the new generation. The use of MIMO technology with polarization-orthogonal channels has become a promising field of research for next-generation mobile and stationary communication systems [1–3]. Studies of the possibility of using an increase in the number of antennas of MIMO systems with polarization-orthogonal antennas have not been sufficiently conducted. The aim of the article is to study the limitations of the possibility of increasing the throughput of a radio access system using MIMO antennas with polarization orthogonal antennas
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