NDLI: Blind Channel Estimation for CP/CP-Free OFDM Systems Using Subspace Approach

Content Provider	IEEE Xplore Digital Library
Author	Shih-Hao Fang Ju-Ya Chen Jing-Shiun Lin Ming-Der Shieh Jen-Yuan Hsu
Copyright Year	2015
Description	Author affiliation: Inst. of Commun. Eng., Nat. Sun Yat-sen Univ., Kaohsiung, Taiwan (Ju-Ya Chen) \|\| Ind. Technol. Res. Inst., Hsinchu, Taiwan (Shih-Hao Fang; Jen-Yuan Hsu) \|\| Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan (Jing-Shiun Lin; Ming-Der Shieh)
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).
Starting Page	1
Ending Page	5
File Size	387091
Page Count	5
File Format	PDF
ISBN	9781479980888
DOI	10.1109/VTCSpring.2015.7145717
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-11
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Channel estimation Receiving antennas Blind equalizers Mathematical model Phase shift keying Noise
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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