A general framework and optimization for spacially-coupled serially concatened systems

Tarik Benaddi (1, 2) , Charly Poulliat (3, 4) , Romain Tajan (5)

1 Lab-STICC_IMTA_CID_TOMS
2 IMT Atlantique - MO - Département Micro-Ondes
3 IRIT-SC - Signal et Communications
4 Toulouse INP - Institut National Polytechnique (Toulouse)
5 IMS - Laboratoire de l'intégration, du matériau au système

In this paper, we provide a general framework for spatially-coupled concatenated systems. We explicit the analogy with spatially-coupled protographs and provide an adapted EXIT chart analysis. By proposing a continuous-valued coupling matrix, we propose a code design procedure for faster convergence. When considering general bit- interleaved coded-modulation scheme, we also conjecture that the spatially-coupled scheme of general detectors saturates to a value very close (lower bound) to the threshold given by the Area theorem.

Mots clés: Turbo codes; Spatially coupling; AWGN; EXIT charts; Saturation; Bit-interleaved coded modulation; Faster-than-Nyquist; Index Terms-Turbo codes; bit-interleaved coded-modulation

Domaines: Electronique; Informatique [cs]

Tarik Benaddi, Charly Poulliat, Romain Tajan. A general framework and optimization for spacially-coupled serially concatened systems. GLOBECOM 2017: 2017 IEEE Global Communications conference, Dec 2017, Singapour, Singapore. pp.1-6, ⟨10.1109/GLOCOM.2017.8254239⟩. ⟨hal-01807318⟩