INTEGRATED CIRCUIT, TRANSMITTER AND TRANSMISSION METHOD
FIG14 is a diagram illustrating a code resource setting rule table according to Embodiment 4 of the present invention
FIG14 is a diagram illustrating a code resource setting rule table according to Embodiment 4 of the present invention. In FIG14, while basic offset pattern "0, 4, 2, 6" is applied to cyclic shift amount candidates 0 to 3 of an antenna port with identification number 0, an offset pattern different from the basic offset pattern is applied to cyclic shift amount candidates 4 to 7 of the antenna port with identification number 0. That is, in generalized expression, different offset patterns are applied to cyclic shift amount candidate X and cyclic shift amount candidate X+4 of the antenna port with identification number 0. In particular, while the basic offset pattern is applied to cyclic shift amount candidate X, offset pattern "0, 4, 1, 5" or offset pattern "0, 4, 3, 7" is applied to cyclic shift amount candidate X+4. That is, with the offset pattern group applied to cyclic shift amount candidates 4 to 7 of the antenna port with identification number 0, all offset patterns are common in that the difference in the cyclic shift amount applied to the antenna port with identification number 0 and the antenna port with identification number 1, and the difference in the cyclic shift amount applied to the antenna port with identification number 2 and the antenna port with identification number 3 are 4. In contrast, with the offset pattern group applied to cyclic shift amount candidates 4 to 7 of the antenna port with identification number 0, there are a plurality of values in the difference in the cyclic shift amount applied to the antenna port with identification number 1 and the antenna port with identification number 2.
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.']