Low-complexity robust downlink precoding

Central Publication

• Mostafa Medra, Wing-Kin (Ken) Ma and Timothy N. Davidson.
  Low-complexity robust MISO downlink precoder optimization for the limited feedback case
  in Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing,
  Brisbane, April 2015

Abstract

• We consider the design of the linear precoder for a multiple-input single-output (MISO) downlink in a system that employs limited feedback using Grassmannian quantization. The goal is to minimize the outage probability of a target signal-to-interference-and-noise ratio (SINR) under a transmitted power constraint. By approximating the outage constraint by a zero-outage region, employing a semidefinite relaxation, and applying an extension of the S-Lemma, the problem is converted into a quasi-convex problem. Insights into the structure of the solution of that problem generate an alternate design formulation that provides greater robustness in the presence of significant uncertainties and has a quasi-closed form solution.

Paper

• The manuscript is available as a pdf file.

Related References

• An refined version of these ideas has been published in the IEEE Transactions on Signal Processing

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