Convergence Analysis of Iterative Threshold Decoding Process  

作　　者：Mohammed Lahmer Mostafa Belkasmi Abdallah Rhattoy Mohammed Lahmer;Mostafa Belkasmi;Abdallah Rhattoy(Department of Computer Science, High School of Technologies, Meknes, Morocco;Department of Network and Telecoms, ENSIAS, Rabat, Morocco)

机构地区：[1]Department of Computer Science, High School of Technologies, Meknes, Morocco [2]Department of Network and Telecoms, ENSIAS, Rabat, Morocco

出　　处：《Journal of Computer and Communications》2016年第14期98-107,共11页电脑和通信（英文）

摘　　要：Today the error correcting codes are present in all the telecom standards, in particular the low density parity check (LDPC) codes. The choice of a good code for a given network is essentially linked to the decoding performance obtained by the bit error rate (BER) curves. This approach requires a significant simulation time proportional to the length of the code, to overcome this problem Exit chart was introduced, as a fast technique to predict the performance of a particular class of codes called Turbo codes. In this paper, we success to apply Exit chart to analyze convergence behavior of iterative threshold decoding of one step majority logic decodable (OSMLD) codes. The iterative decoding process uses a soft-input soft-output threshold decoding algorithm as component decoder. Simulation results for iterative decoding of simple and concatenated codes transmitted over a Gaussian channel have shown that the thresholds obtained are a good indicator of the Bit Error Rate (BER) curves.Today the error correcting codes are present in all the telecom standards, in particular the low density parity check (LDPC) codes. The choice of a good code for a given network is essentially linked to the decoding performance obtained by the bit error rate (BER) curves. This approach requires a significant simulation time proportional to the length of the code, to overcome this problem Exit chart was introduced, as a fast technique to predict the performance of a particular class of codes called Turbo codes. In this paper, we success to apply Exit chart to analyze convergence behavior of iterative threshold decoding of one step majority logic decodable (OSMLD) codes. The iterative decoding process uses a soft-input soft-output threshold decoding algorithm as component decoder. Simulation results for iterative decoding of simple and concatenated codes transmitted over a Gaussian channel have shown that the thresholds obtained are a good indicator of the Bit Error Rate (BER) curves.

关 键 词：OSMLD EXIT BER Mutual Information Iterative Threshold Decoding Extrinsic Information LLR 

分 类 号：TN9[电子电信—信息与通信工程]