Enhanced puncturing and low-density parity-check (LDPC) code structure

An apparatus for wireless communications across a wireless radio channel at varying communication rates within a wireless communication network comprising a plurality of wireless communication devices, the apparatus comprising:

• means for encoding a set of information bits based on a low-density parity-check (LDPC) code to produce a code word, the LDPC code defined by a base graph having a first number of variable nodes and a second number of check nodes;
• means for puncturing bits in the code word corresponding to at least two of the first number of variable nodes in the base graph to produce a punctured code word,
• wherein the base graph includes at least one additional variable node for the at least two punctured variable nodes, and wherein each additional variable node is connected to one check node, the check node coupled to a pair of punctured variable nodes;
• and
• means for transmitting a radio frequency signal comprising transmit symbols associated with the punctured code word.

An apparatus for wireless communications across a wireless radio channel at varying communication rates within a wireless communication network comprising a plurality of wireless communication devices, comprising:

• at least one processor coupled with a memory and configured to:
• encode a set of information bits based on a low-density parity-check (LDPC) code to produce a code word, the LDPC code defined by a base graph having a first number of variable nodes and a second number of check nodes;
• and
• puncture bits in the code word corresponding to at least two of the first number of variable nodes in the base graph to produce a punctured code word,
• wherein the base graph includes at least one additional variable node for the at least two punctured variable nodes, and wherein each additional variable node is connected to one check node, the check node coupled to a pair of punctured variable nodes;
• and
• a transmitter configured to transmit a radio frequency signal comprising transmit symbols associated with the punctured code word via an antenna of the apparatus across the wireless radio channel.

A non-transitory computer readable medium having computer executable code stored thereon for wireless communications across a wireless radio channel at varying communication rates within a wireless communication network comprising a plurality of wireless communication devices, the code comprising:

• code for encoding, via an encoder of a wireless communication device, a set of information bits based on a low-density parity-check (LDPC) code to produce a code word, the LDPC code defined by a base graph having a first number of variable nodes and a second number of check nodes;
• code for puncturing, via a puncturing module of the wireless communication device according to a puncturing pattern, bits in the code word corresponding to at least two of the first number of variable nodes in the base graph to produce a punctured code word,
• wherein the base graph includes at least one additional variable node for the at least two punctured variable nodes, wherein each additional variable node is connected to one check node, the check node coupled to a pair of punctured variable nodes;
• and
• code for transmitting a radio frequency signal comprising transmit symbols associated with the punctured code word via an antenna of the wireless communication device across the wireless radio channel.