Mapping of data blocks to resource elements

摘要

A modulation mapper (1003) selects respective data blocks (DBs) hierarchically and sequentially in descending order of a transmission power ratio; locates, from a resource element group, unused REs to which modulation symbols can be allocated; and decides the allocation of modulation symbols in the REs. A channel resource element mapper (1004) performs the mapping of modulation symbols of the respective DBs to the REs on the basis for the decided allocation. A complex-value transmission signal is generated from the group of REs.