Effective channel control random beamforming for single user MIMO systems

Hojae Lee, Jongrok Park, Hyukmin Son, Sanghoon Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)


In general, it has been demonstrated that the performance of conventional random beamforming (RBF) approaches that of ideal eigen beamforming when the number of users is large in a cell by exploiting multi-user diversity. However, if the number of users decreases, such as femto or pico cell in the 3GPP Long Term Evolution-Advanced standard, the performance degradation occurs in the RBF scheme due to the lack of multi-user diversity. In this paper, we present a novel precoder based on singular value decomposition (SVD) using feedback of weight values in an RBF environment. For achieving performance improvement in the femto cell environment, we generate a precoding matrix appropriate to user channel by controlling the feedback values with an equivalent feedback quantity. In the simulation results, we verify the outstanding performance of the proposed scheme for a small number of users.

Original languageEnglish
Pages (from-to)175-186
Number of pages12
JournalWireless Networks
Issue number2
Publication statusPublished - 2013 Jan 1


All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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