OFDM packing and LDPC framing for constellation shaping in NG WLANs

A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry a station (STA) for operating in a next-generation wireless local area network (WLAN), the instructions to configure the STA for LDPC framing and OFDM packing, wherein transmitter circuitry is configured by the processing circuitry to divide payload bits into LDPC codewords, add shortening bits, and map a coded bit stream into QAM symbols and into OFDM tones for transmission,

• wherein for the LDPC framing and OFDM packing, the transmitter circuitry is configured to:
• compute a number of output bits (bout) to be transmitted based on a number of payload bits (bin) at an output of a shaping encoder, a shaping rate (rshaping), and an overhead percent (Boverhead);
• calculate a number of OFDM symbols (Nsym) based on the number of output bits (bout) to be transmitted and a number of data bits per OFDM symbol (Ndbps);
• calculate a number of LDPC codewords (NCW) based on a number of codebits per LDPC codeword (NLDPC), the code rate (Rldpc), and the number of output bits (bout);
• calculate a number of shortening bits (Nshrt) to be appended to a LDPC codeword based on the number of output bits (bout), a number of shorting bits per codeword (NSPCW) and a number of codewords with additional shorting bits (NSPCW1);
• append a number of repetition bits (Nrep) after LDPC encoding based on whether an LDPC code rate matches a ratio between amplitude bits and sign bits of a target QAM level;
• and
• perform OFDM packing by adding the number of repetition bits (Nrep) after interleaving to fill the number of OFDM symbols (Nsym) including adding an additional OFDM symbol when a number of total coded bits (NTCB) does not be fit into the number of OFDM symbols (Nsym).