Title :
Concatenated twist Hadamard codes
Author :
Che, Shuling ; Wang, Peng ; Wang, Xinmei
Author_Institution :
Xidian Univ., Xi´´an
fDate :
12/1/2007 12:00:00 AM
Abstract :
In this letter, a new class of low-rate error-correcting codes named twist Hadamard codes (TwHC) are designed based on two single parity check constraints in bi-orthogonal Hadamard codes. TwHC consists of two branches zigzag Hadamard codes (ZHC) twisted together. Its decoding complexity is very low with the help of fast Hadamard transform. Simulation results show that, compared with concatenated ZHC, parallel concatenated TwHC can significantly improve error floor performance of short codes.
Keywords :
Hadamard codes; concatenated codes; error correction codes; parity check codes; bi-orthogonal Hadamard codes; concatenated codes; decoding complexity; error-correcting codes; fast Hadamard transform; single parity check; twist hadamard codes; zigzag Hadamard codes; Artificial satellites; Bit error rate; Concatenated codes; Decoding; Error correction; Error correction codes; Multiaccess communication; Parity check codes; Turbo codes; Ultra wideband communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2007.071083
