Joint channel estimation and decoding of root LDPC codes in block-fading channels

Iryna Andriyanova (1) , Ezio Biglieri (2) , David Declercq (1)

1 ETIS - UMR 8051 - Equipes Traitement de l'Information et Systèmes
2 DITIC, universitat Pompeu Fabra

We study iterative receivers for joint decoding and channel-state estimation for transmission on block-fading chan- nels of root-LDPC-coded signals. Root-LDPC codes are known to be most performant codes for block-fading channels, as their spacial "root" structure allows to get the full-diversity property. This property ensures a good error decoding performance of root LDPC codes, especially in contrast with the performance standard LDPC codes (having the maximum diversity equal to 1). However, as any channel code, root-LDPC codes also suffer from the diversity loss when the channel state information is not known at the receiver. In this work we propose a joint channel estimation- decoding scheme for root-LDPC codes that helps to overcome this problem and still to have the full-diversity.

Domaines: Théorie de l'information [cs.IT]; Théorie de l'information et codage [math.IT]

Iryna Andriyanova, Ezio Biglieri, David Declercq. Joint channel estimation and decoding of root LDPC codes in block-fading channels. Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE, Dec 2011, United States. pp.1 - 4, ⟨10.1109/GLOCOM.2011.6134331⟩. ⟨hal-00671662⟩