Title :
Threshold improvement of low-density lattice codes via spatial coupling
Author :
Uchikawa, Hironori ; Kurkoski, Brian M. ; Kasai, Kenta ; Sakaniwa, Kohichi
Author_Institution :
Dept. of Commun. & Integrated Syst., Tokyo Inst. of Technol., Tokyo, Japan
fDate :
Jan. 30 2012-Feb. 2 2012
Abstract :
Spatially-coupled low-density lattice codes (LDLC) are constructed using protographs. By using Monte Carlo density evolution with single-Gaussian messages, we observe that the threshold of the spatially-coupled LDLC is within 0.22 dB of capacity of the unconstrained power channel. This is in contrast with a 0.5 dB noise threshold for the conventional LDLC construction.
Keywords :
Gaussian processes; Monte Carlo methods; channel capacity; channel coding; Monte Carlo density evolution; protographs; single-Gaussian messages; spatial coupling; spatially-coupled low-density lattice codes; threshold improvement; unconstrained power channel capacity; Couplings; Lattices; Maximum likelihood decoding; Monte Carlo methods; Noise; Parity check codes;
Conference_Titel :
Computing, Networking and Communications (ICNC), 2012 International Conference on
Conference_Location :
Maui, HI
Print_ISBN :
978-1-4673-0008-7
Electronic_ISBN :
978-1-4673-0723-9
DOI :
10.1109/ICCNC.2012.6167364
