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Feasibility of a wearable textile antenna hub based on massive MIMO systems

Recently, massive MIMO systems have attracted a great attention due to its spectral efficiency and increase in transmission capacity required by next generation of wireless systems. However, this technology presents some disadvantages like the high cost, physical size and complexity of the hardware in the RF chain (eg. individual radio frequency (RF) chains are required per antenna element). Hence, in this paper a wearable solution based on massive MIMO technology, which will enable to achieve symmetric data rates in both uplink and downlink, is proposed as well as some technological solutions. Several transmitter and receiver architectures given in the literature for size- and cost-effective implementation of massive MIMO are presented in this work. Additionally, an study of the capacity improvement with the number of antennas and the uplink frame structure design for the textile antenna hub is shown.