Waveform based data integrity check and error correction

A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

• dividing data into a plurality of data blocks;
• producing and appending a cyclic redundancy check (CRC) to each of the plurality of data blocks;
• low-density parity-check (LDPC) encoding the plurality of data blocks and appended CRCs into a plurality of LDPC blocks and appended CRCs;
• concatenating the plurality of LDPC blocks and appended CRCs;
• producing information associated with error checks;
• producing a codeword using a codebook, wherein the codeword is based on the information associated with the error checks;
• producing an orthogonal frequency-division multiplex (OFDM) signal by mapping the codeword and the concatenated plurality of LDPC blocks and appended CRCs onto resource elements of the OFDM signal;
• and
• transmitting the produced OFDM signal.

A wireless transmit/receive unit (WTRU) comprising:

• a processor;
• and
• a transceiver, operatively coupled to the processor;
• wherein:
• the transceiver is configured to receive an orthogonal frequency-division multiplex (OFDM) signal produced by mapping a codeword and a concatenated plurality of low-density parity-check (LDPC) blocks and appended cyclic redundancy checks (CRCs) onto resource elements of the OFDM signal, wherein the codeword is produced by using a codebook, wherein the codeword is based on information associated with error checks.