SCMA SUPERPOSITION TRANSMISSION FOR UPLINK SCMA SYSTEMS AND CODEBOOK DESIGN THEREOF

摘要

Disclosed are an overlapping transmission method of an uplink SCMA system and a mobile communication system using the same. In a UL SCMA system according to an embodiment, a method of transmitting data overlap by a user terminal includes: dynamically allocating an SCMA codebook to the user terminal; Performing SCMA encoding based on the SCMA codebook dynamically allocated to the user terminal; Identifying an SCMA codeword based on an SCMA codebook corresponding to each data layer as the SCMA encoding is performed; And overlapping the identified SCMA codeword and transmitting the same to the base station.