Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

Linear Precoding for Relay Networks with Finite-Alphabet Constraints

Preprint

Read this article at

Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      In this paper, we investigate the optimal precoding scheme for relay networks with finite-alphabet constraints. We show that the previous work utilizing various design criteria to maximize either the diversity order or the transmission rate with the Gaussian-input assumption may lead to significant loss for a practical system with finite constellation set constraint. A linear precoding scheme is proposed to maximize the mutual information for relay networks. We exploit the structure of the optimal precoding matrix and develop a unified two-step iterative algorithm utilizing the theory of convex optimization and optimization on the complex Stiefel manifold. Numerical examples show that this novel iterative algorithm achieves significant gains compared to its conventional counterpart.

      Related collections

      Author and article information

      Journal
      2011-01-06
      2011-01-14
      1101.1345

      http://arxiv.org/licenses/nonexclusive-distrib/1.0/

      Custom metadata
      Accepted by IEEE Int. Conf. Commun. (ICC), Kyoto, Japan, 2011
      cs.IT math.IT

      Numerical methods, Information systems & theory

      Comments

      Comment on this article