Method and device for performing communication by using orthogonal or non-orthogonal code multiple access scheme in wireless communication system

A terminal for transmitting uplink data in a wireless communication system, the terminal comprising:

• a radio frequency (RF) unit transmitting and receiving a radio signal;
• and
• a processor connected to the RF unit,
• wherein the processor is configured to
• receive control information from a base station,
• select a terminal-specific codeword or receive allocation information of the terminal-specific codeword based on the control information, and
• transmit the uplink data based on the terminal-specific codeword,
• wherein the terminal-specific codeword is determined as a codeword having a value with a low peak-to-average power ratio (PAPR), when the terminal is located on the outside of a cell,
• wherein the terminal-specific codeword is determined as a codeword having a value with a high PAPR, when the terminal is located in the center of the cell,
• wherein the control information is received via a control channel or a broadcast channel,
• wherein downlink received power is measured by the terminal based on the control channel or the broadcast channel,
• wherein uplink received power is measured by the base station based on a reference signal and a synchronization signal,
• wherein a geometry class is selected by the terminal based on the downlink received power,
• wherein the terminal-specific codeword is selected by the terminal based on the geometry class,
• wherein the geometry class is determined based on a position of the terminal in the cell, and
• wherein the geometry class is mapped to an index of the terminal-specific codeword.