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EXIT chart evaluation of a receiver structure for multi-user multi-antenna OFDM systems

Hammarberg, Peter LU ; Rusek, Fredrik LU ; Salvo Rossi, Pierluigi and Edfors, Ove LU (2009) IEEE Global Telecommunications Conference (GLOBECOM), 2009 In Proc. IEEE Global Telecommunications Conference (GLOBECOM) 2009 p.2402-2407
Abstract
In this paper we evaluate, by means of Extrinsic Information Transfer (EXIT) charts, an iterative receiver that has emerged as a promising candidate for non-coherent multi-user multi-antenna OFDM systems. The receiver performs parallel interference cancellation (followed by linear filtering) and channel estimation, using soft symbols obtained from a bank of single-user decoders. For the sake of conceptual clarity we study a system with two single antenna users and a receiver with two antennas, and we demonstrate how the convergence behavior of the receiver can be visualized using paired three dimensional EXIT surfaces. Our results show that the actual decoder trajectories obtained through simulations are well predicted from the EXIT... (More)
In this paper we evaluate, by means of Extrinsic Information Transfer (EXIT) charts, an iterative receiver that has emerged as a promising candidate for non-coherent multi-user multi-antenna OFDM systems. The receiver performs parallel interference cancellation (followed by linear filtering) and channel estimation, using soft symbols obtained from a bank of single-user decoders. For the sake of conceptual clarity we study a system with two single antenna users and a receiver with two antennas, and we demonstrate how the convergence behavior of the receiver can be visualized using paired three dimensional EXIT surfaces. Our results show that the actual decoder trajectories obtained through simulations are well predicted from the EXIT charts. For the iterative receiver under investigation we identify a very specific problem with EXIT chart generation; the EXIT curve for the inner component decoder depends on the outer encoder. To handle this problem we propose a modification to the iterative receiver which solves the aforementioned problem; the performance degradation is demonstrated to be small. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Proc. IEEE Global Telecommunications Conference (GLOBECOM) 2009
pages
2402 - 2407
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE Global Telecommunications Conference (GLOBECOM), 2009
external identifiers
  • WOS:000280579100398
  • Scopus:77951579485
ISBN
978-1-4244-4148-8
DOI
10.1109/GLOCOM.2009.5426288
project
Radiosystem: NORDITE/WILATI - WIreless LANs with high Throughput in Interference-limited environments (VINNOVA, AM/FT/OE)
language
English
LU publication?
yes
id
3e865691-0ec5-49f8-ae46-fdf430a42747 (old id 1604722)
date added to LUP
2010-05-21 12:05:09
date last changed
2016-10-13 04:40:45
@misc{3e865691-0ec5-49f8-ae46-fdf430a42747,
  abstract     = {In this paper we evaluate, by means of Extrinsic Information Transfer (EXIT) charts, an iterative receiver that has emerged as a promising candidate for non-coherent multi-user multi-antenna OFDM systems. The receiver performs parallel interference cancellation (followed by linear filtering) and channel estimation, using soft symbols obtained from a bank of single-user decoders. For the sake of conceptual clarity we study a system with two single antenna users and a receiver with two antennas, and we demonstrate how the convergence behavior of the receiver can be visualized using paired three dimensional EXIT surfaces. Our results show that the actual decoder trajectories obtained through simulations are well predicted from the EXIT charts. For the iterative receiver under investigation we identify a very specific problem with EXIT chart generation; the EXIT curve for the inner component decoder depends on the outer encoder. To handle this problem we propose a modification to the iterative receiver which solves the aforementioned problem; the performance degradation is demonstrated to be small.},
  author       = {Hammarberg, Peter and Rusek, Fredrik and Salvo Rossi, Pierluigi and Edfors, Ove},
  isbn         = {978-1-4244-4148-8},
  language     = {eng},
  pages        = {2402--2407},
  publisher    = {ARRAY(0x86f2a68)},
  series       = {Proc. IEEE Global Telecommunications Conference (GLOBECOM) 2009},
  title        = {EXIT chart evaluation of a receiver structure for multi-user multi-antenna OFDM systems},
  url          = {http://dx.doi.org/10.1109/GLOCOM.2009.5426288},
  year         = {2009},
}