Efficient interpolation of precoding matrices in MIMO-OFDM systems

Yu Feng Chou*, Tzu-Hsien Sang

*Corresponding author for this work

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

1 Scopus citations

Abstract

One way of fully exploiting the channel capacity in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems is to deploy precoding vectors derived from SVD to form parallel data pipes. Optimal precoding requires accurate channel state information for each OFDM subcarrier. This paper proposes a limited channel decomposition architecture by using an interpolation method to reduce the computation cost of precoding. In this scheme, only on the pilot subcarriers the estimated channel information is used to get SVD decomposition results, and precoding vectors on other subcarriers are obtained by an orthogonal interpolation method. The interpolation relies on an important assumption that the singular modes on adjacent subcarriers change approximately in a linear way. Numerical simulations suggests that with appropriate settings, e.g., proper FFT size and interpolation gap etc., the proposed scheme can reduce computation efficiently while only sacrifice little performance.

Original languageEnglish
Title of host publication2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2010
DOIs
StatePublished - 1 Dec 2010
Event2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2010 - Marrakech, Morocco
Duration: 20 Jun 201023 Jun 2010

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Conference

Conference2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2010
CountryMorocco
CityMarrakech
Period20/06/1023/06/10

Keywords

  • Array signal processing
  • Interpolation
  • MIMO-OFDM
  • SVD

Fingerprint Dive into the research topics of 'Efficient interpolation of precoding matrices in MIMO-OFDM systems'. Together they form a unique fingerprint.

  • Cite this

    Chou, Y. F., & Sang, T-H. (2010). Efficient interpolation of precoding matrices in MIMO-OFDM systems. In 2010 IEEE 11th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2010 [5671092] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC). https://doi.org/10.1109/SPAWC.2010.5671092