An iterative precoder optimization method for K-user interference channel systems

Hakjea Sung, Kyoung Jae Lee, Seok Hwan Park, Inkyu Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

In this paper, we propose a linear precoding and decoding scheme maximizing the sum rate of K-user interference channel systems where each node has multiple antennas. With an iterative approach, the precoding matrices are identified by deriving the gradient of the sum rate and applying the gradient descent method. Due to non-convexity of the formulated problem, the proposed precoder cannot guarantee the global optimal solution, and a locally maximized sum rate can be found by the proposed precoding scheme. Then, we obtain the single-symbol decodable receiver from the modified minimum mean-squared error filter. From simulation results, we exhibit a local optimal sum rate of the interference channel systems with the proposed method. Also, we demonstrate that the proposed algorithm outperforms other existing methods in terms of the sum rate.

Original languageEnglish
Title of host publicationGLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
DOIs
Publication statusPublished - 2009
Event2009 IEEE Global Telecommunications Conference, GLOBECOM 2009 - Honolulu, HI, United States
Duration: 2009 Nov 302009 Dec 4

Publication series

NameGLOBECOM - IEEE Global Telecommunications Conference

Other

Other2009 IEEE Global Telecommunications Conference, GLOBECOM 2009
CountryUnited States
CityHonolulu, HI
Period09/11/3009/12/4

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Sung, H., Lee, K. J., Park, S. H., & Lee, I. (2009). An iterative precoder optimization method for K-user interference channel systems. In GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference [5425256] (GLOBECOM - IEEE Global Telecommunications Conference). https://doi.org/10.1109/GLOCOM.2009.5425256