Blind channel estimation for CP/CP-free OFDM systems using subspace approach

Shih Hao Fang, Ju Ya Chen, Jing Shiun Lin, Ming Der Shieh, Jen Yuan Hsu

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

4 Citations (Scopus)

Abstract

The existing subspace-based channel estimation approach for orthogonal frequency division multiplexing (OFDM) systems with an expanding factor, called the repetition index, suffers from the problem of low probability of full row rank of the signal matrix with few OFDM blocks, which may fail to estimate the channel impulse response (CIR). In this paper, a subspace-based channel estimation algorithm with a two-step signal matrix construction method is proposed. The probability of full row rank of the proposed signal matrix is very close to one even if few OFDM blocks are available. The proposed approach can also be applied to both cyclic prefix (CP)-based and non-CP-based OFDM systems whereas the conventional approach is only suitable for CP-based systems. Simulation results show that the proposed method outperforms related blind channel estimation approaches in terms of normalized mean square error (NMSE).

Original languageEnglish
Title of host publication2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479980888
DOIs
Publication statusPublished - 2015 Jul 1
Event81st IEEE Vehicular Technology Conference, VTC Spring 2015 - Glasgow, United Kingdom
Duration: 2015 May 112015 May 14

Publication series

NameIEEE Vehicular Technology Conference
Volume2015
ISSN (Print)1550-2252

Other

Other81st IEEE Vehicular Technology Conference, VTC Spring 2015
CountryUnited Kingdom
CityGlasgow
Period15-05-1115-05-14

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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