Shift-coefficient table design of QC-LDPC code for smaller code block sizes in mobile communications

A method of wireless communication, comprising:

• establishing, by a processor of an apparatus, a wireless communication link with at least one other apparatus via a transceiver of the apparatus;
• and
• wirelessly communicating, by the processor, with the other apparatus via the wireless communication link by:
• selecting a first shift-coefficient table from a plurality of shift-coefficient tables;
• generating a quasi-cyclic-low-density parity-check (QC-LDPC) code using a base matrix and at least a portion of the first shift-coefficient table;
• selecting a codebook from a plurality of codebooks embedded in the QC-LDPC code;
• storing the selected codebook in a memory associated with the processor;
• encoding data using the selected codebook to generate a plurality of modulation symbols of the data;
• and
• controlling the transceiver to multiplex, convert, filter, amplify and radiate the modulation symbols as electromagnetic waves through one or more antennas of the apparatus to transmit the modulation symbols of the data to the other apparatus via the wireless communication link,
• wherein the selecting of the first shift-coefficient table from the plurality of shift-coefficient tables comprises selecting the first shift-coefficient table according to one or more rules related to either or both of a code block size and a code rate of the data for relatively smaller code block sizes.