Title :
On the equivalence of the ACE and the EMD of a cycle for the ACE spectrum constrained LDPC codes
Author :
Deka, Kuntal ; Rajesh, A. ; Bora, Prabin Kumar
Author_Institution :
Dept. of Electron. & Electr. Eng., Indian Inst. of Technol. Guwahati, Guwahati, India
Abstract :
The Extrinsic Message Degree (EMD) of a cycle in the Tanner graph of a low density parity check (LDPC) code measures the connectivity of the cycle. As it is difficult to calculate the EMD, the Approximate EMD (ACE) is generally used. However, the ACE of a cycle is not always equal to its EMD. This paper presents some sufficient conditions for the equivalence of the ACE and the EMD of a cycle for the ACE spectrum constrained LDPC codes.
Keywords :
cyclic codes; parity check codes; ACE spectrum constrained LDPC codes; EMD equivalence; Tanner graph; extrinsic message degree; low density parity check code; Information processing; Iterative decoding; Maximum likelihood decoding; Signal to noise ratio; Turbo codes; ACE; EMD; Low density parity check (LDPC) codes; cycles;
Conference_Titel :
Turbo Codes and Iterative Information Processing (ISTC), 2014 8th International Symposium on
Conference_Location :
Bremen
DOI :
10.1109/ISTC.2014.6955087
