Proceedings ArticleDOI
Linear MMSE Multi-User MIMO Downlink Precoding for Users with Multiple Antennas
Bernd Bandemer,Martin Haardt,Samuli Visuri +2 more
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TLDR
This paper considers the multi-user MIMO downlink channel, and indicates that the performance difference between the direct and duality-based method that is visible in uncoded BER curves vanishes when channel coding is introduced to the system.Abstract:
In this paper, the multi-user MIMO downlink channel is considered, where a single transmitter (base station) sends data to several users within the same resource unit. Assuming perfect channel state information (CSI) at the transmitter, different linear precoding schemes are studied, aiming at mean square error minimizing transmission to all users. The exact MMSE solution can be obtained by exploiting up-link/downlink duality. A suboptimal solution based on necessary conditions for MMSE optimality may also be computed directly in the downlink domain. Our results indicate that the performance difference between the direct and duality-based method that is visible in uncoded BER curves vanishes when channel coding is introduced to the system. We also compare the MMSE-optimal approaches to other existing linear precoding schemes (BD, S-MMSE).read more
Citations
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Journal ArticleDOI
Generalized Design of Multi-User MIMO Precoding Matrices
V. Stankovic,Martin Haardt +1 more
TL;DR: A novel linear precoding technique that can address several optimization criteria with an arbitrary number of antennas at the user terminals and extract the full diversity in the system and reach the maximum sum-rate capacity in case of high multi-user interference.
Patent
Method and apparatus for prioritized information delivery with network coding over time-varying network topologies
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TL;DR: In this paper, the authors propose a method for information delivery with network coding over time-varying network topologies, which decomposes a sequence of topology graphs into a plurality of virtual graphs.
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References
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A vector-perturbation technique for near-capacity multiantenna multiuser communication-part I: channel inversion and regularization
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