| abstract |
In one aspect, the adaptive modulation and coding method includes, in a user terminal, receiving a modulation and coding scheme (MCS) index, acquiring a modulation order corresponding to the received MCS index as a modulation order of a downlink shared channel, from a first table in which MCS indexes are associated with modulation orders including 8 and transport block size (TBS) indexes, and a second table is provided in which MCS indexes are associated with modulation orders of less than 8 and TBS indexes, and the first table is provided by puncturing a combination of a modulation order and a TBS index in the second table so that the first table and the second table are equal in a number of bits for an MCS index. In other aspects, a user terminal and a radio base station are provided. |