A System-?level Study of Multi?TRP Transmission Function Based on Layer Coordination

Abstract

In multi-?TRP network inter-?cell interference (ICI) strictly limits spectral efficiency Coordinated multi?point (CoMP) is proposed to solve the ICI problem Joint transmission (JT) which turns the interference signal into useful signal is one of the downlink transmission mode in CoMP In general JT is divided into coherent JT and non?-coherent JT In order to simplify the system design non?-coherent JT is more practical than coherent JT In this thesis the performance of non?-coherent JT with multiple-?input multiple-?output (MIMO) is investigated The conventional JT mainly focuses on the user equipment (UE) with single antenna and the coordinated base stations (BSs) send the same signal to UE By leveraging the merits of multiple antennas such as diversity gain and spatial multiplexing gain the spectral efficiency would be improve substantially However the preferred transmitted data stream of the coordinated BSs might be different so the layer coordination is required in different JT modes A system ?level study is conducted in this work First the clustering method is used to define the co?-scheduled BSs Because not all the UEs need JT a decision rule based on reference signal received power (RSRP) Moreover the scheduling method based on proportional fair scheduling with different clustering method is proposed The mentioned transmission processes are implemented in a system? level simulator which is fully compiled with the 3GPP specification The simulation results are presented to demonstrate the improvement of spectral efficiency in different JT mode with MIMO

Date of Award	2019
Original language	English
Supervisor	Kuang-Hao Liu (Supervisor)