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Wireless Communications and Mobile Computing
Volume 2017 (2017), Article ID 5709367, 7 pages
https://doi.org/10.1155/2017/5709367
Research Article

Diversity-Multiplexing-Nulling Trade-Off Analysis of Multiuser MIMO System for Intercell Interference Coordination

1IT and Mobile Communication Division, Samsung Electronics, Soowon, Republic of Korea
2School of Electrical Engineering, Korea University, Seoul, Republic of Korea

Correspondence should be addressed to Chung G. Kang; rk.ca.aerok@gnakgcc

Received 16 September 2017; Accepted 6 November 2017; Published 10 December 2017

Academic Editor: Mostafa Zaman Chowdhury

Copyright © 2017 Jinwoo Kim and Chung G. Kang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A fundamental performance trade-off of multicell multiuser multiple-input multiple-output (MU-MIMO) systems is explored for achieving intercell and intracell interference-free conditions. In particular, we analyze the three-dimensional diversity-multiplexing-nulling trade-off (DMNT) among the diversity order (i.e., the slope of the error performance curve), multiplexing order (i.e., the number of users that are simultaneously served by MU-MIMO), and nulling order (i.e., the number of users with zero interference in a victim cell). This trade-off quantifies the performance of MU-MIMO in terms of its diversity and multiplexing order, while nulling the intercell interference toward the victim cell in the neighbor. First, we design a precoding matrix to mitigate both intercell and intracell interference for a linear precoding-based MU-MIMO system. Then, the trade-off relationship is obtained by analyzing the distribution of the signal-to-noise ratio (SNR) at the user terminals. Furthermore, we demonstrate how DMNT can be applied to estimate the long-term throughput for each mobile station, which allows for determining the optimal number of multiplexing order and throughput loss due to the interference nulling.