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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
In this paper, a low complexity and memory-efficient concatenated codes called Parallel Interleaved Concatenated Gallager Codes (PICGCs) are presented. PICGCs combine both better BER performance of long codes and lower complexity and less memory required of short codes. We introduce the construction of PICGCs. The decoding algorithm based on sum-product algorithm is proposed. We also analyze the memory saving and derive its upper bound. The Simulation results show PICGCs can reduce complexity and memory required of decoding significantly with little sacrifice in performance.