A Low Complexity User Grouping Strategy for Downlink Multi-User MIMO Scheduling

Nguyen Ngoc Van 

School of Electronics and Telecommunications, Hanoi University of Science and 

Technology, No 1 , Dai Co Viet Street, Hai Ba Trung, HaNoi, Vietnam 

ABSTRACT 

In this paperwe present a low complexity user grouping algorithm for multi-user MIMO system employing opportunistic fair scheduling (OFS) and zero forcing beamforming (ZFB), and develop a framework for cross-layer resource scheduling. Given a particular subset of users and their channel conditions, the optimal beamforming scheme can be calculated. The multi-user esource scheduling problem then refers to the selection of the optimal subset of users for transmission at each time instant to maximize the total throughput of the system. The simulation result shows that the performance of resource scheduling algorithm based on user grouping method proposed in this paper is close to the optimal performance which used exhaustion method. In addition, user grouping does not affect the fairness among all users.

KEYWORDS : 

Opportunistic fair scheduling (OFS); zero-forcing beamforming (ZFB); 

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