Title :
Joint Interference Suppression for Multi-User TDD MIMO Downlink with Other-Cell Interference
Author :
Liu, Zujun ; Sun, Dechun ; Liu, Lin ; Yi, Kechu
Author_Institution :
State Key Lab. of Integrated Services Networks, Xidian Univ., Xi´´an, China
fDate :
3/1/2012 12:00:00 AM
Abstract :
In multiuser TDD MIMO downlink communications, system performance suffers from multiuser interference(MUI) and other-cell interference(OCI). This paper proposes designing a precoder to jointly suppress MUI and OCI. Firstly, a precoding matrix is designed for multiuser interference suppression, with the help of the QR decomposition of generalized MMSE channel inversion. And then, using a signal leakage criterion, the second precoding matrix is designed to suppress OCI and residual MUI. The proposed algorithm can avoid user feedback in multiuser TDD MIMO systems. Simulation results demonstrate the effectiveness of the proposed scheme.
Keywords :
MIMO communication; interference suppression; precoding; QR decomposition; generalized MMSE channel inversion; joint interference suppression; multiuser TDD MIMO downlink communications; multiuser TDD MIMO systems; multiuser interference suppression; other-cell interference; precoder; precoding matrix; signal leakage criterion; system performance; user feedback; Algorithm design and analysis; Covariance matrix; Downlink; Interference; MIMO; Receiving antennas; Signal to noise ratio; Interference suppression; TDD MIMO; downlink; multiuser interference(MUI); other-cell interference(OCI);
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.012412.111047
