... broadband video systems 16 QAM Microwave digital radio, modems, DVB-C, DVB-T 32 QAM Terrestrial microwave, DVB-T 64 QAM DVB-C, modems, broadband set top boxes, MMDS 256 QAM Modems, DVB-C (Europe), ... digital modulation family is Quadrature Amplitude Modulation (QAM). QAM is used in applications including microwave digital radio, DVB-C (Digital Video Broadcasting - Cable) and modems. In 16-state ... more power-efficient, less linear RF power amplifier to be used.19QPSKOffsetQPSKQIQIEyeConstellationFigure 15.I-Q “Offset” Modulation Digital Modulation in Communications Systems –An...