Symbol-based BP Detection for MIMO Systems associated with Non-Binary LDPC Codes

Ali Haroun (1, 2, 3) , Charbel Abdel Nour (4, 1) , Matthieu Arzel (4, 1) , Christophe Jego (3)

1 ELEC - Département Electronique
2 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
3 IMS - Laboratoire de l'intégration, du matériau au système
4 Lab-STICC_TB_CACS_IAS

Abstract-In this paper, an efficient iterative receiver for digital communication systems is investigated. It combines a Non-Binary Low-Density Parity-Check (NB-LDPC) decoder with a high-order constellation demapper and a Multiple-Input Multiple-Output (MIMO) detector. A suboptimal MIMO detector based on the Belief Propagation (BP) algorithm is investigated as an alternative to a Maximum Likelihood (ML) detector. Extrinsic information is exchanged between the detector and the decoder thanks to an iterative process. EXtrinsic Information Transfer (EXIT) charts enable to analyze the convergence behaviour of the proposed MIMO-BP detector. A suitable schedule for the different types of iterations is finally proposed to reduce the receiver latency and improve its error correction performance.

Mots clés: Non-Binary LDPC; Belief propagation algorithm; MIMO communications

Domaines: Electronique; Traitement du signal et de l'image [eess.SP]

Ali Haroun, Charbel Abdel Nour, Matthieu Arzel, Christophe Jego. Symbol-based BP Detection for MIMO Systems associated with Non-Binary LDPC Codes. WCNC 2014 : IEEE Wireless Communications and Networking Conference, Apr 2014, Istanbul, Turquie. pp.212 - 217, ⟨10.1109/WCNC.2014.6951949⟩. ⟨hal-01174280⟩