NDLI: Iterative detection for Walsh-Hadamard transformed OFDM

Content Provider	IEEE Xplore Digital Library
Author	Zhongding Lei Yan Wu Chin Keong Ho Sumei Sun Ping He Yuan Li
Copyright Year	2003
Description	Author affiliation: Inst. for Infocomm Res., Singapore, Singapore (Zhongding Lei; Yan Wu; Chin Keong Ho; Sumei Sun; Ping He; Yuan Li)
Abstract	In this paper, an iterative detection method is proposed to reduce the noise enhancement in Walsh-Hadamard transformed (WHT)-OFDM system. The iterative detection starts with conventional detection. The estimation of the received signal at the weakest subcarrier is calculated based on the detection of all data symbols after the hard decision or a combination of hard decision with soft decision, such as utilizing a clipping function. Then the actual received signal at the weakest subcarrier is replaced by the estimated signal and the conventional detection is applied repeatedly to replace the next weakest signal until all subcarriers are replaced. Through replacing the real subcarrier signal with the less noisy estimated signal one by one, iteratively, we can reduce the noise amplification significantly and smoothly. It is seen in the simulations, the bit error rate performance of the iterative detection is much better than that of the conventional detection for either WHT-OFDM system or OFDM system.
Starting Page	637
Ending Page	640
File Size	283495
Page Count	4
File Format	PDF
ISBN	0780377575
ISSN	10903038
DOI	10.1109/VETECS.2003.1207620
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-04-22
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Noise reduction Fading Iterative methods Bit error rate Signal to noise ratio Detection algorithms Sun Helium Signal restoration
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
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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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