1. A device in a wireless communication network, comprising:a processor, a memory and a transceiver;wherein the processor, by executing program instructions stored in the memory, is configured to:obtain an input sequence, wherein the input sequence comprises K bits of information, and K is a positive integer;

determine a lifting factor Z according to K;

encode the input sequence using an encoding matrix H, to obtain an encoded sequence; and

output the encoded sequence for transmission by the transceiver;wherein the encoding matrix H is obtained from a low density parity check (LDPC) base graph by replacing each element of the LDPC base graph with a matrix of Z rows and Z columns;wherein the LDPC base graph comprises m rows and n columns, 5?m?46, and 27?n?68, and each element in the LDPC base graph has a value of 0 or 1;wherein an element in the LDPC base graph has a value of 1 when:i=0, j=0, 1, 2, 3, 5, 6, 9, 10, 11, 12, 13, 15, 16, 18, 19, 20, 21, 22, or 23;

i=1, j=0, 2, 3, 4, 5, 7, 8, 9, 11, 12, 14, 15, 16, 17, 19, 21, 22, 23, or 24;

i=2, j=0, 1, 2, 4, 5, 6, 7, 8, 9, 10, 13, 14, 15, 17, 18, 19, 20, 24, or 25;

i=3, j=0, 1, 3, 4, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 20, 21, 22, or 25;

i=4, j=0, 1, or 26;wherein i is a row index of the LDPC base graph, 0?i?m, j is a column index of the LDPC base graph, 0?j