Apparatus and method for wireless communication

An apparatus for wireless communication, performed by a receiving terminal, comprising:

• wireless communication interface, configured to receive a first Orthogonal Time-Frequency-Space (OTFS) symbol, wherein the first OTFS symbol is multiplexed by a plurality of transmitting terminals;
• a plurality of delay-Doppler regions of the first OTFS symbol carries modulated symbols and pilot signals of the plurality of transmitting terminals, respectively;
• the plurality of delay-Doppler regions one-to-one correspond to the plurality of transmitting terminals;
• there is no overlap among the plurality of delay-Doppler regions;
• and there exists delay shift intervals corresponding to different transmitting terminals in a delay dimension and Doppler shift intervals corresponding to different transmitting terminals in a Doppler dimension;
• and
• a processor, configured to perform the following operations:
• A1:
• dividing the plurality of delay-Doppler regions into a plurality of first-class sets according to different shift intervals occupied in a first dimension, and performing iterative serial de-interference decoding on a plurality of delay-Doppler regions in a same first-class set of the plurality of the first-class sets;
• and
• A2:
• dividing the plurality of delay-Doppler regions into a plurality of second-class sets according to different shift intervals occupied in a second dimension, and performing iterative serial de-interference decoding on a plurality of delay-Doppler regions in a same second-class set of the plurality of the second-class sets;
• wherein the first dimension is one of the delay dimension and the Doppler dimension, and the second dimension is another one, different from the first dimension, of the delay dimension and the Doppler dimension.