In this article. a graph-theoretic method (taking advantage of constraints among sets associated with the corresponding parity-check matrices) is applied for the construction of a double low-density parity-check (D-LDPC) code (also known as LDPC code pair) in a joint source-channel coding (JSCC) system. Specifically. we pre-set the girth of the parity-check matrix for the LDPC code pa... https://www.roneverhart.com/SAAB-9-3-I-98-02-Frontlykt-Hoyre/