Digitized quadrature phase shift keying modulator

摘要

A digitized quadrature phase shift keying modulator capable of making the modulation output frequency variable and sufficing a single ROM of waveform shaping digital filter with look-up table by using interpolators which re-sample waveforms of impulse response of each of the output I data and Q data from the digital filter to change the sampling rate and extractors for extracting the interpolated I data and Q data so that samples of each of the interpolated I data and Q data occur sequentially and alternately at different timings.