@inproceedings{a7b68f37c1a444edb04504046620b94e,
title = "Blind channel estimation for CP/CP-free OFDM systems using subspace approach",
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).",
author = "Fang, {Shih Hao} and Chen, {Ju Ya} and Lin, {Jing Shiun} and Shieh, {Ming Der} and Hsu, {Jen Yuan}",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 81st IEEE Vehicular Technology Conference, VTC Spring 2015 ; Conference date: 11-05-2015 Through 14-05-2015",
year = "2015",
month = jul,
day = "1",
doi = "10.1109/VTCSpring.2015.7145717",
language = "English",
series = "IEEE Vehicular Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings",
address = "United States",
}