Spatial multiplexing gain for two interfering MIMO broadcast channels based on linear transceiver

Authors:
Jaesin Kim;Seok-Hwan Park;Hakjea Sung;Inkyu Lee
Affiliations:
Agency for Defense Development, Daejeon, Korea and School of Electrical Engineering, Korea University, Seoul, Korea;School of Electrical Engineering, Korea University, Seoul, Korea;Samsung Electronics, Kyunggi-do, Korea and School of Electrical Engineering, Korea University, Seoul, Korea;School of Electrical Engineering, Korea University, Seoul, Korea
Venue:
IEEE Transactions on Wireless Communications
Year:
2010

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Abstract

In this letter, we provide an expression of spatial multiplexing gain (SMG) for two mutually interfering multiple-input multiple-output (MIMO) broadcast channels, referred to as MIMO-IBC, with linear transceiver. We derive the SMG with respect to user antenna distribution, and compare the systems with and without cooperation among receive antennas in each cell. Additionally, we propose a linear precoding and decoding algorithm for the MIMO-IBC which maximizes the sum rate by extending a solution for single-cell multiple-input single-output broadcast channels. Simulation results confirm the accuracy of our theoretical SMG analysis for the MIMO-IBC.