Communication apparatus and communication method

A communication apparatus comprising:

• a sampling circuit configured to sample a first transmission signal at a predetermined sampling frequency and sample a second transmission signal at the predetermined sampling frequency, the first transmission signal input from a first external apparatus at a predetermined first transmission rate, the predetermined sampling frequency being higher than the predetermined first transmission rate and being not an integer multiple of the predetermined first transmission rate, the second transmission signal input from a second external apparatus at a second transmission rate the same as the predetermined sampling frequency;
• a conversion circuit configured to sequentially output data output by the sampling circuit as parallel data;
• a data width conversion circuit configured to, in receiving the first transmission signal, convert the parallel data into symbol sequences each including a second integer number of symbols, the second integer being an integer obtained by multiplying a division value, which is obtained by dividing the predetermined sampling frequency by the predetermined first transmission rate, by a predetermined first integer;
• and
• a resampling circuit configured to output the symbols of one of the symbol sequences at a plurality of sampling points respectively corresponding to a plurality of transmission symbols of the first transmission signal as resampling data of the first transmission signal.