Fig. 6
From: A construction of the high-rate regular quasi-cyclic LDPC codes
a The bit error rate and b frame error rate performances of four LDPC codes in example 2. In these figures, the circle and box solid lines separately represent the performances of the regular quasi-cyclic (2925,2341) and (1092,1001) LDPC codes with coding rate 4/5 and 11/12 generated by the procedure from (4) to (37). The circle and box dotted lines correspond to (2850,2280) and 1020,935 QC-LDPC codes which are also shown in [17, 18]. These 4 LDPC codes are all decoded with 50 iterations of the SPA (sum-product algorithm)