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APPARATUS FOR UP-CONVERTING A MULTICHANNEL DIGITAL RADIO FREQUENCY CAPABLE OF DEVELOPING A SMALL WIRELESS TELECOMMUNICATION AND BROADCASTING DEVICE USING A BROAD BANDWIDTH
APPARATUS FOR UP-CONVERTING A MULTICHANNEL DIGITAL RADIO FREQUENCY CAPABLE OF DEVELOPING A SMALL WIRELESS TELECOMMUNICATION AND BROADCASTING DEVICE USING A BROAD BANDWIDTH
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机译:用于利用宽带通过宽带转换能力来发展小型无线通信和广播设备的多通道数字无线电频率的装置
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摘要
PURPOSE: An apparatus for up-converting a multichannel digital radio frequency is provided to prevent changes of a device value due to temperature changes or secular changes by comprising the device with a digital device having high reliability.;CONSTITUTION: A plurality of digital modulators(100) perform digital modulation for a plurality of digital signals. A DAC(300) receives a digital signal from the plurality of digital modulators. The DAC converts the digital signal to a broadband radio frequency signals having respective different frequencies. The digital modulator comprises a receiving part which converts the received digital signal to an I signal and a Q signal and a pulse shaping filter which limits a frequency band of the I signal and the Q signal. The digital modulator comprises a first interpolation part performing the interpolation for the I signal and the Q signal, a numerical control oscillator, and a quadrature modulator which comprises a multiplier and an adder and modulates for the Q signal and the I signal.;COPYRIGHT KIPO 2013;[Reference numerals] (100) First digital modulator; (200) Second interpolation part; (300) DAC; (AA) First digital signal; (BB) Second digital signal; (CC) n-th digital signal; (DD) Second digital modulator; (EE) n-th digital modulator; (FF) RF
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