Investigation of Blind and Pilot Based Channel Estimation Performances in MIMO-OFDM System

Üstün Ercan S., Kurnaz Ç.

23nd Signal Processing and Communications Applications Conference (SIU), Malatya, Turkey, 16 - 19 May 2015, pp.1869-1872 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/siu.2015.7130221
  • City: Malatya
  • Country: Turkey
  • Page Numbers: pp.1869-1872
  • Keywords: MIMO-OFDM, blind and pilot based channel estimation, ICA, comb type pilot arrangement
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

In order to decrease wireless channel's destructive effects and increase system performance in multiple input multiple output orthogonal frequency division multiplexing (MIMO-OFDM) system, channel state information (CSI) is required. CSI is obtained by using pilot based; blind and semi-blind channel estimation algorithms. Though blind algorithm has low system performance is preferred owing to its high bandwidth efficiency. In this study, MIMO-OFDM channel estimation performance is investigated by using two different frequency selective channels for a blind algorithm based on independent component analysis (ICA) and comb type pilot based algorithm. It is seen from the results that MIMO-OFDM channel estimation performance changes according to channels frequency selectivity's, and pilot based algorithm is not always given best results.