| 摘要 |
A signal converter 100 provided on an optical cable connecting the baseband unit 300 and the radio units 420 and 430. The signal converter 100 has a function to return time domain signals output from the baseband unit 300, to frequency domain signals and generate as many time domain signals as the number of antennas by assigning weights onto the frequency domain signals, and a function to combine, by an array combining, a plurality of time domain signals to a single frequency domain signal, and output the single frequency domain signal to the baseband unit 300.
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