Method and apparatus for sending and receiving a low-complexity transmission in a wireless communication system

An apparatus for wireless communication between a network entity and a plurality of user equipment wherein the network entity communicates with the plurality of user equipment on a plurality of subcarriers, the apparatus comprising:

• means for generating a first transmission for a single subcarrier from the plurality of subcarriers, the single subcarrier being assigned to a first user equipment from the plurality of user equipment, wherein the means for generating the first transmission further comprises means for generating a continuous sinusoidal signal at a frequency corresponding to the single subcarrier assigned to the first user equipment, and means for modulating the continuous sinusoidal signal with at least one modulation symbol;
• and
• means for sending the first transmission on the single subcarrier by the first user equipment, the first transmission being sent concurrently with a single-carrier frequency division multiple access (SC-FDMA) transmission sent by a second user equipment from the plurality of user equipment, the SC-FDMA transmission sent on multiple subcarriers from the plurality of subcarriers, the multiple subcarriers being different from the single subcarrier and assigned to the second user equipment.

An apparatus for wireless communication between a network entity and a plurality of user equipment, wherein the network entity communicates with the plurality of user equipment on a plurality of subcarriers, the apparatus comprising:

• circuitry configured to:
• generate a first transmission for a single subcarrier from the plurality of subcarriers, the single subcarrier being assigned to a first user equipment from the plurality of user equipment, wherein the circuitry is further configured to generate a continuous sinusoidal signal at a frequency corresponding to the single subcarrier assigned to the first user equipment, and to modulate the continuous sinusoidal signal with at least one modulation symbol, and
• send the first transmission on the single subcarrier by the first user equipment, the first transmission being sent concurrently with a single-carrier frequency division multiple access (SC-FDMA) transmission sent by a second user equipment from the plurality of user equipment, the SC-FDMA transmission sent on multiple subcarriers from the plurality of subcarriers, the multiple subcarriers being different from the single subcarrier and assigned to the second user equipment.

A non-transitory computer-readable medium for wireless communication between a network entity and a plurality of user equipment, wherein the network entity communicates with the plurality of user equipment on a plurality of subcarriers, the non-transitory computer-readable medium comprising:

• code for causing at least one computer to generate a first transmission for a single subcarrier from the plurality of subcarriers, the single subcarrier being assigned to a first user equipment from the plurality of user equipment, wherein the code is further configured to generate a continuous sinusoidal signal at a frequency corresponding to the single subcarrier assigned to the first user equipment, and to modulate the continuous sinusoidal signal with at least one modulation symbol, and
• code for causing the at least one computer to send the first transmission on the single subcarrier by the first user equipment, the first transmission being sent concurrently with a single-carrier frequency division multiple access (SC-FDMA) transmission sent by a second user equipment from the plurality of user equipment, the SC-FDMA transmission sent on multiple subcarriers from the plurality of subcarriers, the multiple subcarriers being different from the single subcarrier and assigned to the second user equipment.

A method for wireless communication between a network entity and a plurality of user equipment, wherein the network entity communicates with the plurality of user equipment on a plurality of subcarriers, the method comprising:

• processing a received signal to obtain a first transmission sent on a single subcarrier from the plurality of subcarriers, the first transmission sent by a first user equipment from the plurality of user equipment and to obtain a single-carrier frequency division multiple access (SC-FDMA) transmission sent on multiple subcarriers from the plurality of subcarriers, the multiple subcarriers being different from the single subcarrier, the SC-FDMA transmission sent by a second user equipment from the plurality of user equipment;
• and
• performing demodulation for the first transmission to recover data sent on the single subcarrier by the first user equipment, wherein performing demodulation for the first transmission further comprises deriving a channel estimate based on at least one reference symbol sent in the first transmission by the first user equipment, and performing coherent demodulation for at least one received symbol from the single subcarrier based on the channel estimate to obtain at least one demodulated symbol.

An apparatus for wireless communication between a network entity and a plurality of user equipment, wherein the network entity communicates with the plurality of user equipment on a plurality of subcarriers, the apparatus comprising:

• means for processing a received signal to obtain a first transmission sent on a single subcarrier from the plurality of subcarriers, the first transmission sent by a first user equipment and to obtain a single-carrier frequency division multiple access (SC-FDMA) transmission sent on multiple subcarriers from the plurality of subcarriers, the multiple subcarriers being different from the single subcarrier, the SC-FDMA transmission sent by a second user equipment from the plurality of user equipment;
• and
• means for performing demodulation for the first transmission to recover data sent on the single subcarrier by the first user equipment, wherein the means for performing demodulation for the first transmission further comprises means for deriving a channel estimate based on at least one reference symbol sent in the first transmission by the first user equipment, and means for performing coherent demodulation for at least one received symbol from the single subcarrier based on the channel estimate to obtain at least one demodulated symbol.

An apparatus for wireless communication between a network entity and a plurality of user equipment, wherein the network entity communicates with the plurality of user equipment on a plurality of subcarriers, the apparatus comprising:

• circuitry configured to:
• process a received signal to obtain a first transmission sent on a single subcarrier from the plurality of subcarriers, the first transmission sent by a first user equipment, and to obtain a single-carrier frequency division multiple access (SC-FDMA) transmission sent on multiple subcarriers from the plurality of subcarriers, the multiple subcarriers being different from the single subcarrier, the SC-FDMA transmission sent by a second user equipment from the plurality of user equipment, and
• perform demodulation for the first transmission to recover data sent on the single subcarrier by the first user equipment, wherein the circuitry is further configured to derive a channel estimate based on at least one reference symbol sent in the first transmission by the first user equipment, and to perform coherent demodulation for at least one received symbol from the single subcarrier based on the channel estimate to obtain at least one demodulated symbol.