NDLI: Adaptive pilot utilization for OFDM channel estimation in a time varying channel

Content Provider	IEEE Xplore Digital Library
Author	Jungsub Byun Natarajan, N.P.
Copyright Year	2009
Description	Author affiliation: Dept. of Electrical Engineering 360 Packard Building, Stanford, CA 94305-9505, USA (Jungsub Byun) \|\| Cognizant Technology solutions India Pvt. Ltd, Chennai-600096, India (Natarajan, N.P.)
Abstract	We propose an architecture for Pilot Symbol Assisted Modulation based OFDM systems for estimating the channel in a rayleigh fading channel. We use deviation of corresponding signals as a parameter to predict the channel characteristics in the transmitter end. We transmit fixed length of test signal to the channel whenever connection setup initiation takes place. Then by using the response, number of pilot signals to insert is determined and correspondingly appended to the data signal. Thus by varying the number of pilots depending upon the channel environment, it certainly improves the channel estimation and reduction in number of pilots used for channel estimation and feedback. This proposed approach differs from the conventional pilot assisted channel estimation in terms of pilot symbols utilization and real time integration between transmitter and receiver without any feedback. Using computer simulations, we showed that the proposed Transmitter architecture could achieve a better bit-error-rate (BER) performance in high mobility Environment. Furthermore, Performance comparisons in terms of BER, Average spectral efficiency between proposed method and PSAM based channel estimation in a Rayleigh fading channel is simulated to demonstrate the effectiveness of this approach.
Starting Page	1
Ending Page	5
File Size	647593
Page Count	5
File Format	PDF
ISBN	9781424445646
DOI	10.1109/WAMICON.2009.5207292
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-04-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel estimation Transmitters Fading Feedback Bit error rate OFDM modulation Testing Computer simulation Computer architecture Computational modeling time-varying channels Loopback Pilot Spacing Determiner fading channels pilot symbol assisted modulation Rayleigh fading
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in