| 摘要 |
PROBLEM TO BE SOLVED: To inhibit quantization noise from adding to leakage power when performing bandpass &Dgr;&Sgr; modulation on an RF signal to be transmitted as a radio wave.SOLUTION: A signal processing device 21 for processing an RF signal to be transmitted as a radio wave includes a bandpass &Dgr;&Sgr; modulator 25 for performing bandpass &Dgr;&Sgr; modulation on the RF signal. A quantization noise stopband of the bandpass &Dgr;&Sgr; modulator 25 includes a usage band of the RF signal and has a wider bandwidth than the usage band of the RF signal. |
