Fig. 5
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 1. In these figures, the circle, box, and diamond solid lines separately represent to the performances of the regular quasi-cyclic (4095,3781), (7560,6931), and (8190,5161) LDPC codes with coding rate 12/13 generated by the procedure from (4) to (38). The star dotted line corresponds to the (4095,3771) QC-LDPC code which is also shown in the example 4 of [16]. These 4 LDPC codes are all decoded with 50 iterations of the SPA (sum-product algorithm)