University of Surrey

Test tubes in the lab Research in the ATI Dance Research

EXIT Chart Analysis for Turbo LDS-OFDM Receivers

Razavi, R, Imran, MA and Tafazolli, R (2011) EXIT Chart Analysis for Turbo LDS-OFDM Receivers In: 7th International Wireless Communications and Mobile Computing Conference (IWCMC), 2011-07-04 - 2011-07-08, Istanbul.

EXIT Chart Analysis for Turbo LDS-OFDM Receivers.pdf
Available under License : See the attached licence file.

Download (93kB)
Text (licence)

Download (33kB)


In this paper, the mutual information transfer characteristics of turbo Multiuser Detector (MUD) for a novel air interface scheme, called Low Density Signature Orthogonal Frequency Division Multiplexing (LDS-OFDM) are investigated using Extrinsic Information Transfer (EXIT) charts. LDS-OFDM uses Low Density Signature structure for spreading the data symbols in frequency domain. This technique benefits from frequency diversity besides its ability of supporting parallel data streams more than the number of subcarriers (overloaded condition). The turbo MUD couples the data symbols' detector of LDS scheme with users' FEC (Forward Error Correction) decoders through the message passing principle. The effect of overloading on LDS scheme's performance is evaluated using EXIT chart. The results show that at Eb/N0 as low as 0.3, LDS-OFDM can support loads up to 300%.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Authors :
Razavi, R
Imran, MA
Tafazolli, R
Date : 4 July 2011
DOI : 10.1109/IWCMC.2011.5982559
Contributors :
Additional Information :

Copyright 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Depositing User : Symplectic Elements
Date Deposited : 30 Nov 2012 09:48
Last Modified : 31 Oct 2017 14:44

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800