An Interference-Aware Precoding Scheme with Other-Cell Interference for Downlink Multi-User MIMO Channel
VTC Fall(2010)
摘要
We propose a linear precoding technique, called multiuser generalized eigenmode transmission (MGET), based on the leakage-based precoding technique. A signal-to-leakage-plus-noise (SLNR) precoding scheme is one approach for linear precoding in the multiple-input multiple-output broadcast channel that sends multiple data streams to different users in the same cell. Unfortunately, SLNR-based scheme neglects other-cell interference, which limits the performance of users at the edge of the cell. MGET addresses the shortcomings of previous SLNR-based beamformers by presenting an interference-aware enhancement to SLNR precoding scheme that uses a whitening filter for interference suppression at the receiver and a novel precoder using the interference-plus-noise covariance matrix for each user at the transmitter. Numerical results show that the proposed MGET technique outperforms the traditional block diagonalization (BD) linear technique in reasonable SINR regime.
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关键词
signal-to-leakage-plus-noise precoding scheme,multiuser channels,linear predictive coding,broadcast channels,slnr-based beamformer,multiuser generalized eigenmode transmission,covariance matrices,other-cell interference,array signal processing,leakage-based precoding technique,interference-aware precoding scheme,block diagonalization linear technique,interference-plus-noise covariance matrix,mimo communication,filtering theory,interference suppression,downlink multiuser mimo channel,multiple data stream,eigenvalues and eigenfunctions,multiple-input multiple-output broadcast channel,whitening filter,linear precoding,covariance matrix,mimo,interference,signal to noise ratio
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