Factor graph based design of an OFDM-IDMA receiver performing joint data detection, channel estimation, and channel length selection

Author

Novak, Clemens ; Matz, Gerald ; Hlawatsch, Franz

Author_Institution

Inst. of Commun. & Radio-Freq. Eng., Vienna Univ. of Technol., Vienna

fYear

2009

fDate

19-24 April 2009

Firstpage

2561

Lastpage

2564

Abstract

We present a factor graph based design of a receiver for pilot-assisted OFDM-IDMA systems transmitting over frequency-selective channels. The receiver performs joint iterative multiuser data detection and channel estimation with a complexity that is linear in the number of users, and it includes estimation of the channel length. Simulation results demonstrate large performance gains compared to OFDM-IDMA receivers using separate MMSE channel estimation.

Keywords

OFDM modulation; channel estimation; graph theory; iterative methods; least mean squares methods; multi-access systems; OFDM-IDMA receiver; channel length selection; factor graph; frequency-selective channels; iterative multiuser data detection; separate MMSE channel estimation; Binary phase shift keying; Channel estimation; Data engineering; Design engineering; Discrete Fourier transforms; Frequency estimation; Performance gain; Radio frequency; Sum product algorithm; Transmitters; OFDM-IDMA; channel estimation; factor graph; iterative receiver; multiuser detection; sum-product algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2009. ICASSP 2009. IEEE International Conference on

Conference_Location

Taipei

ISSN

1520-6149

Print_ISBN

978-1-4244-2353-8

Electronic_ISBN

1520-6149

Type

conf

DOI

10.1109/ICASSP.2009.4960145

Filename

4960145