부산대학교 도서관

Summary: ``The potential of deploying large-scale antenna arrays infuture wireless systems has stimulated extensive research on hybridtransceiver designs aiming to approximate the optimal fully-digitalschemes with much reduced hardware cost, and signal processingcomplexity. Generally, this hybrid transceiver structure requires ajoint design of analog, and digital processing to enable bothbeamsteering, and spatial multiplexing gains. In this paper, we developvarious weighted mean-square-error minimization (WMMSE) based hybridtransceiver designs for $K$-user multiple-input multiple-output (MIMO)interference systems, which are applicable to both millimeter wave(mmWave) channels, and Rayleigh fading channels. Firstly, a heuristicjoint design of hybrid precoder, and combiner using alternatingoptimization is proposed, in which the majorization-minimization (MM)method is utilized to design the analog precoder, and combiner underunitmodulus constraints. It is demonstrated that this scheme achievescomparable performance to the fully-digital WMMSE solution. To furtherreduce the computational complexity, a phase projection based two-stagescheme is proposed to decouple the designs of the analog, and digitalprecoder/combiner. Secondly, inspired by the fully-digital solutionsbased on the block-diagonalization zeroforcing (BD-ZF), andsignal-to-leakage-plus-noise ratio (SLNR) criteria, the low-complexityMM-based BD-ZF, and SLNR hybrid designs are proposed, respectively, forapproximating the corresponding fully-digital solutions. Thirdly, thepartially-connected hybrid structure conceived for reducing systemhardware cost, and power consumption is considered, for which theMM-based alternating optimization algorithm still works. Our numericalresults characterize the sum rate performance of all proposed hybriddesigns in comparison to the existing benchmarks.''