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Quadrature phase shift keying demodulator of digital broadcast reception system and demodulation method thereof
Quadrature phase shift keying demodulator of digital broadcast reception system and demodulation method thereof
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机译:数字广播接收系统的正交相移键控解调器及其解调方法
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摘要
A demodulator for demodulating a digital broadcast signal and a demodulation method thereof. A QPSK demodulator of a digital broadcast reception system includes an in-phase/quadrature (I/Q) detector. The I/Q detector generates a baseband I signal and a baseband Q signal by multiplying a modulated QPSK signal by an I/Q carrier signal. A bandwidth adjustable first filter receives the baseband I signal and the baseband Q signal generated by the I/Q detector and rejects imaginary noise included in the received signals. A data restoration unit restores original data before the signals output from the first filter are QPSK modulated.
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