INTEGRATED CIRCUIT, TRANSMITTER AND TRANSMISSION METHOD
FIG13 is a diagram illustrating another code resource setting rule table according to Embodiment 3 of the present invention
Furthermore, when different offset patterns are applied to cyclic shift amount candidate 2M (M=0,1, ...) and cyclic shift amount candidate 2M+1, if there are two continuous cyclic offset amount candidates among cyclic shift amount candidates of the reference antenna port which are associated with offset patterns other than the basic offset pattern, offset pattern "0, 1, 2, 3" may be associated with one (for example, one with a smaller value), and offset pattern "0, -1, -2, -3" may be associated with the other (for example, one with a greater value). In FIG13, while offset pattern "0, 1, 2, 3" is associated with cyclic shift amount 3 of the antenna port with identification number 0, offset pattern "0, -1, -2, -3" is associated with cyclic shift amount 4 of the antenna port with identification number 0.
diagram
7
Embodiment
5
Embodiment
4
cyclic shift amount candidates cyclic shift amount candidate
2
than
6
Embodiment
21
antenna ports andFIG.
3
Embodiment
['1. An integrated circuit located in an apparatus, said integrated circuit comprising circuitry, which, in operation, is configured to perform a process, said process comprising the steps of: generating, for each of a plurality of antenna ports, respective reference signals using information relating to a first cyclic shift index, the first cyclic shift index being associated with a first antenna port of the plurality of antenna ports; and mapping, for each of the plurality of antenna ports, the respective reference signals to frequency resources, wherein, when the first cyclic shift index is less than half of a total number of cyclic shift indexes, the respective reference signals of each of the plurality of antenna ports are mapped to a first frequency resource; and when the first cyclic shift index is greater than or equal to half of the total number of cyclic shift indexes, the respective reference signals of a half of the plurality of antenna ports are mapped to the first frequency resource and the respective reference signals of the remaining half of the plurality of antenna ports are mapped to a second frequency resource that is different from the first frequency resource; and transmitting the mapped respective reference signals.']