NDLI: Asymptotic analysis of precoded OFDM with hierarchical modulation

Content Provider	IEEE Xplore Digital Library
Author	Mouhouche, B. Mourad, A. Ansorregui, D.
Copyright Year	2013
Description	Author affiliation: Samsung Electron. R&D UK, Staines upon Thames, UK (Mouhouche, B.; Mourad, A.; Ansorregui, D.)
Abstract	This paper investigates the bit error rate (BER) performance of hierarchically modulated precoded Orthogonal Frequency Division Multiplexing (OFDM). We consider a low priority stream modulated on top of a high priority stream with a constellation ratio a and analyze the resulting BER performance. Since the BER depends in a complex way on the particular precoding matrix used, it is difficult for one to gain direct insight into the performance of the hierarchically modulated system. We overcome this difficulty by resorting to the framework of large system analysis [1] in order to derive the asymptotic expression of the BER of the Minimum Mean Squared Error (MMSE) receiver. Assuming that the entries of the precoding matrix are independent and identically distributed (i.i.d) random variables, we derive the limit BER for the 4QAM and the 16QAM low priority stream cases. The limit BER is obtained by assuming that the number of OFDM sub-carriers and the number of OFDM symbols tend to infinity at the same rate. We show that the limit BER is independent of the particular realizations of the precoding matrix. Simulation results show that the asymptotic expression perfectly matches the empirical results obtained for FFT sizes as low as 256 in different channel conditions. We then use the asymptotic expression to gain useful insights into the effect of the different configuration parameters on the system performance.
Sponsorship	IEEE Commun. Soc.
Starting Page	1
Ending Page	8
File Size	1770026
Page Count	8
File Format	PDF
ISBN	9781479913190
DOI	10.1109/ICSPCS.2013.6723931
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-12-16
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading OFDM Precoding Bit error rate high priority stream Modulation Interference asymptotic analysis Hierarchical modulation Approximation methods Signal to noise ratio low priority stream
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
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