Wireless communication apparatus and wireless communication method

1 . A wireless communication apparatus comprising:

a crest factor reduction (CFR) circuit;

a digital pre-distortion (DPD) circuit;

at least one memory configured to store instructions; and

at least one processor configured to execute the instructions to

determine frequency arrangement of a synthesized time signal of a plurality of component carriers (CCs) acquired by synthesizing time signals of each of the plurality of CCs being input to the CFR circuit, and

control the CFR circuit, based on the determined frequency arrangement of the synthesized time signal of the plurality of CCs,

wherein the frequency arrangement indicates whether the CCs are non-contiguously arranged or contiguously arranged, and also indicates a frequency interval between the CCs.

2 . The wireless communication apparatus according to claim 1 , wherein

the CFR circuit holds a plurality of filters having different passbands from one another,

the at least one processor executes the instructions to select, from among the plurality of filters, a filter having a passband according to the determined frequency arrangement of the synthesized time signal of the plurality of CCs, and

the CFR circuit performs CFR processing of suppressing a peak of the synthesized time signal of the plurality of CCs by using the selected filter.

3 . The wireless communication apparatus according to claim 2 , wherein

the CFR circuit repeatedly performs the CFR processing, and

the at least one processor executes the instructions to control the number of repetitions of the CFR processing performed by the CFR circuit, based on a frequency interval between the CCs in the determined frequency arrangement of the synthesized time signal of the plurality of CCs.

4 . The wireless communication apparatus according to claim 3 , wherein the at least one processor executes the instructions to reduce the number of repetitions of the CFR processing performed by the CFR circuit as a frequency interval between the CCs in the determined frequency arrangement of the synthesized time signal of the plurality of CCs increases.

5 . The wireless communication apparatus according to claim 2 , wherein the at least one processor executes the instructions to control a correction amplitude being a suppression amount of a peak of the CFR processing performed 5 by the CFR circuit, based on a frequency interval between the CCs in the determined frequency arrangement of the synthesized time signal of the plurality of CCs.

6 . The wireless communication apparatus according to claim 5 , wherein the at least one processor executes the instructions to reduce the correction amplitude in the CFR circuit as a frequency interval between the CCs in the determined frequency arrangement of the synthesized time signal of the plurality of CCs increases.

7 . A wireless communication method to be executed by a wireless communication apparatus including a crest factor reduction (CFR) circuit and a digital pre-distortion (DPD) circuit, the method comprising:

determining frequency arrangement of a synthesized time signal of a plurality of component carriers (CCs) acquired by synthesizing time signals of each of the plurality of CCs being input to the CFR circuit; and

controlling the CFR circuit, based on the determined frequency arrangement of the synthesized time signal of the plurality of CCs,

wherein the frequency arrangement indicates whether the CCs are non-contiguously arranged or contiguously arranged, and also indicates a frequency interval between the CCs.