Wireless Communications and Mobile Computing · 2021 · 15 citations · 45 references
EngineeringComputer EngineeringElectrical EngineeringComputer NetworksInternet Of ThingsWireless CommunicationsInterference ManagementMassive Multiple-input Multiple-outputSensor NetworksWireless Channel ModelingWireless NetworksWireless Sensor NetworksHeterogeneous Sensor NetworksHeterogeneous Wireless Sensor NetworksMassive Mimo Interference MitigationPower AllocationSystem Capacity Planning
Pilot power allocation for Internet of Things (IoT) devices in massive multi‐input multioutput heterogeneous wireless sensor networks (MIMO‐HWSN) is studied in this paper. The interference caused by fractional pilot reusing in adjacent cells had a negative effect on the MIMO‐HWSN system performance. Reasonable power allocation for users can effectively weaken the interference. Motivated by the water‐filling algorithm, we proposed a suboptimal pilot transmission power method to improve the system capacity. Simulation results show that the proposed method can significantly improve the uplink capacity of the system and explain the influence of different pilot transmission power on the performance of the system, but the complexity of the system almost does not increase.
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