| 摘要 |
PROBLEM TO BE SOLVED: To suppress deteriorated radio communication quality by automatically controlling the signal level of a jamming signal.SOLUTION: A digital relay processing unit 200 performs AD conversion to convert input spectra 120a-120n from analog signals to digital signals, performs digital signal processing to split the converted input spectra 120a-120n into sub-spectra, exchanges frequency bands among the sub-spectra, couples the sub-spectra to generate output spectra 130a-130n, and performs DA conversion to convert the output spectra 130a-130n into digital signals. At this time, the digital relay processing unit 200 performs level measurement on the basis of each sub-spectrum, identifies a sub-spectrum in which a jamming signal is mixed, and controls the gain of the identified sub-spectrum. By this, the sub-spectrum having the mixed jamming signal can be removed or attenuated, so that radio communication performance can be improved. |
