Fourth - harmonic mixers are adopted in carrier recover in the modulation millimeter wave qpsk signal 解调方案同样采用四次谐波混频器在毫米波已调信号上进行载波同步。
2.
The digital msk demodulation based on the dsp system employed the theory of power spectral analysis to demodulate the digital msk modulated signal 在本文中的数字化解调是基于dsp系统，并利用功率谱估计的理论对msk已调信号进行功率谱的估计来实现的。
