Abstract
The performance analysis of the dual-polarized massive multiple-input multiple-output (MIMO) system with Internet of things (IoT) devices is studied when outdoor human-care IoT devices are connected to a cellular network via a dual-polarized massive MIMO system. The research background of the performance analysis of dual-polarized massive MIMO system with IoT devices is that recently the data usage of outdoor human-care IoT devices has increased. Therefore, the outdoor human-care IoT devices are necessary to connect with 5G cellular networks which can expect 1000 times higher performance compared with 4G cellular networks. Moreover, in order to guarantee the safety of the patient for emergency cases, a human-care Iot device must be connected to cellular networks which offer more stable communication for outdoors compared to short-range communication technologies such as Wi-Fi, Zigbee, and Bluetooth. To analyze the performance of the dual-polarized massive MIMO system for human-care IoT devices, a dual-polarized MIMO spatial channel model (SCM) is proposed which considers depolarization effect between the dual-polarized transmit-antennas and the receive-antennas. The simulation results show that the performance of the dual-polarized massive MIMO system is improved about 16% to 92% for 20 to 150 IoT devices compared to conventional single-polarized massive MIMO system for identical size of the transmit array.
Highlights
According to Business Insider, human-care Internet of things (IoT) devices are expected to grow from 120 million in 2015 to 650 million by 2020 [1]
The patient can be monitored in real time by cellular networks for both indoors and outdoors when there are various human-care IoT devices connected to the cellular networks
The training overhead lineally increases as the number of total IoT devices while the number of transmit-antenna can be extended as large as desired
Summary
According to Business Insider, human-care Internet of things (IoT) devices are expected to grow from 120 million in 2015 to 650 million by 2020 [1]. As the use of wearable human-care IoT devices that attach to the body is increasing, the support of a seamless cellular network is essential instead of short-range communication technologies such as Wi-Fi, Zigbee, and Bluetooth. Since human-care IoT devices are closely related to human health and life, seamless communication is very important to guarantee the safety in case of emergencies especially for outdoors. The connection between cellular networks and human-care IoT devices provides real-time human-care monitoring system via variable human-care services such as ambulance, smartwatch, first aid kit, and a medically equipped smartphone. In order to guarantee the safety of the users in case of an emergency, it is necessary to connect with a cellular network which provides more stable connection compared to short-range communication technologies for outdoors
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