Apparatus and method for in multiple access in wireless communication

A method performed by a receiver in a wireless communication system, the method comprising:

• receiving mixed signals from multiple transmitters, the mixed signals associated with a bit-level interleaving, a bit-level scrambling, a bit-level spreading, multidimensional constellation modulation, a symbol-level complex spreading, a symbol-level interleaving, and a symbol-level zero-inserting on a data corresponding to each of the multiple transmitters;
• and
• decoding the mixed signals based on bit-level interleaving information, bit-level scrambling information, multidimensional constellation information, symbol-level complex spreading information, and symbol-level zero-inserting information corresponding to the each of the multiple transmitters to obtain the data,
• wherein decoding of the each of the mixed signals based on interleaving information, the scrambling information, and the multidimensional constellation information corresponding to the data comprises performing multidimensional constellation demodulation on the mixed signals based on the multidimensional constellation information corresponding to each of the multiple transmitters, and the multidimensional constellation information comprises at least one of:
• a mother constellation or a constellation operator,
• wherein the symbol-level complex spreading is associated with a complex spreading sequence, wherein the complex spreading sequence includes at least one symbol having a value of zero, and wherein the symbol-level interleaving and the symbol-level zero-inserting is associated with an interleaving pattern and a zero-inserting pattern, wherein the zero-inserting pattern is associated with a number of zero elements and a position of the zero elements.

A transmitter in a wireless communication system, the transmitter comprising:

• a channel coder;
• a transceiver;
• and
• at least one processor coupled with the channel coder and the transceiver, wherein the at least one processor is configured to:
• perform channel coding on a bit sequence to determine a coded sequence,
• perform a bit-level interleaving, scrambling, and spreading on the coded sequence, after performing the bit-level interleaving, scrambling, and spreading on the coded sequence, perform a multidimensional constellation modulation, based on multidimensional constellation information, on the bit-level interleaved, scrambled, and spread sequence, wherein the multidimensional constellation information comprises at least one of:
• a mother constellation or a constellation operator,
• perform a symbol-level complex spreading on the modulated sequence based on a complex spreading sequence, wherein the complex spreading sequence includes at least one symbol having a value of zero,
• perform a symbol-level interleaving and zero-inserting on the symbol-level complex spread sequence based on an interleaving pattern and a zero-inserting pattern to obtain a data, wherein the zero-inserting pattern is associated with a number of zero elements and a position of the zero elements, and
• transmit the obtained data.