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

We present a factor graph based design of a receiver for pilotassisted 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.

• Type: Conference
• Year: 2009
• Where: ICASSP
• Authors: Clemens Novak, Gerald Matz, Franz Hlawatsch
• Keywords: Channel Estimation, ICASSP 2009, Joint Iterative Multiuser, MMSE Channel Estimation, Signal Processing