Precoding in Multiple-Antenna Broadcast Systems with a Probabilistic Viewpoint

Details Precoding in Multiple-Antenna Broadcast Systems with a Probabilistic Viewpoint Precoding in Multiple-Antenna Broadcast Systems with a Probabilistic Viewpoint

2007-01-09

arxiv.org/abs/cs/0701058v2

Computer Science

Information Theory

Scientific paper

In this paper, we investigate the minimum average transmit energy that can be obtained in multiple antenna broadcast systems with channel inversion technique. The achievable gain can be significantly higher than the conventional gains that are mentioned in methods like perturbation technique of Peel, et al. In order to obtain this gain, we introduce a Selective Mapping (SLM) technique (based on random coding arguments). We propose to implement the SLM method by using nested lattice codes in a trellis precoding framework.

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