Title :
An efficient structure for terminating spatially coupled LDPC codes
Author :
Junyang Ma ; Zhongwei Si ; Zhiqiang He
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun.(BUPT), Beijing, China
Abstract :
A recursive encoding of spatially coupled LDPC codes with low complexity has been proposed in recent works. But it has to solve a system of linear equations to terminate the codes. In this paper we modify the protograph of spatially coupled LDPC codes by adding extra variable nodes, called repeat-accumulate(RA) tail, which can simplify the termination without time delays. Performance analysis with density evolution and simulation results over binary erasure channel(BEC) channels are also provided. Simulation results show that, for spatially coupled LDPC codes with RA tail, the complexity of termination can be reduced with a small trade-off in performance.
Keywords :
encoding; parity check codes; telecommunication channels; BEC; LDPC codes; RA tail; binary erasure channel; linear equations; protograph; recursive encoding; repeat-accumulate tail; Complexity theory; Convolutional codes; Delay effects; Encoding; Mathematical model; Parity check codes; Simulation;
Conference_Titel :
Signal and Information Processing (ChinaSIP), 2015 IEEE China Summit and International Conference on
Conference_Location :
Chengdu
DOI :
10.1109/ChinaSIP.2015.7230548
