Method and apparatus for multi-access uplink transmission of different waveforms

A multi-access method (600) for uplink transmission of different waveforms in wireless communication, the method comprising:

• receiving (602) an allocation of one or more indices among a plurality of indices for a respective user among a plurality of users for the uplink transmission of modulated symbols from each user of the plurality of users based on the allocated one or more indices, wherein the modulated symbols for each user are represented by a second matrix;
• transforming (604) each row of the second matrix for the respective user using a first matrix (P) that is being selected based on a type of the different waveforms of the uplink signals;
• computing (606) vectorization of the transformed second matrix to generate discrete-time signals for the plurality of users;
• and
• transmitting (608) the generated discrete-time signals from each user to an access point or a base station (106).

A communication apparatus (102) for multi-access uplink transmission of different waveforms in wireless communication, the apparatus (102) comprising:

• a receiver (202) that is configured to:
• receive an allocation of one or more indices among a plurality of indices for a respective user among a plurality of users for uplink transmission of modulated symbols from each of the plurality of users based on the allocated one or more indices;
• at least one processor (206) communicatively coupled with the receiver, wherein the at least one processor is configured to:
• transform, using a first matrix (P) being selected based on a type of the different waveforms for the uplink transmission, the modulated symbols for each index of the one or more indices allocated to the respective user;
• generate discrete-time signals by upsampling the transformed symbols by a factor of the plurality of indices, wherein
• one or more zeroes are stuffed during upsampling of the transformed symbols for the respective user, and
• circularly right shifting, upon stuffing one or more zeroes, the upsampled symbols by an index number of shifts, wherein the index number relates to a sequence number of the one or more indices allocated to the respective user;
• and
• a transmitter (204) communicatively coupled with the receiver and the at least one processor, wherein the transmitter is configured to:
• transmit, to an access point or a base station (106), uplink signals from each user corresponding to the one or more indices allocated to the user.

A communication apparatus (102) for multi-access uplink transmission of different waveforms in wireless communication, the apparatus (102) comprising:

• a receiver (202) that is configured to:
• receive an allocation of one or more indices among a plurality of indices for a respective user among a plurality of users for the uplink transmission of modulated symbols from each user of the plurality of users based on the allocated one or more indices, wherein the modulated symbols for each user are represented by a second matrix;
• at least one processor (206) communicatively coupled with the receiver (202), wherein the at least one processor is configured to:
• transform each row of the second matrix for the respective user using a first matrix (P) that is being selected based on a type of the different waveforms of the uplink signals;
• compute a vectorization of the transformed second matrix to generate discrete-time signals for the plurality of users;
• and
• a transmitter (204) communicatively coupled with the receiver (202) and the at least one processor (206), wherein the transmitter (204) is configured to:
• transmit the generated discrete-time signals from each user to an access point or a base station (106).