The punctured Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) code proposed by CCSDS 131.1-O-2 (Experimental Specification) is investigated. First, the characteristics of the codes are analyzed, and its decoding performance is simulated. Then, the encoding method called Greedy Algorithm combining with the code’s character is improved, and a fast encoding method is proposed. At last, how to optimize the encoding method by taking good use of the functions afforded by the DSP TMS320C6416 platform and skills of...