00000cab a22000003a 4500 UP-99796217608882569 Buklod 20231007233957.0 m |o d | ta 090623s xx d | ||r ||||| || DENGII eng Mirabbasi, S. Hierarchical QAM a spectrally efficient dc-free modulation scheme. pp. 140-146 A new spectrally efficient, dc-free modulation scheme called hierarchical quadrature amplitude modulation is proposed. The use of HQAM in high-data-rate digital communication systems opens new possibilities for the practical realization of highly integrated receivers. HQAM. Hierarchical QAM. Hierarchical quadrature amplitude modulation. High-data-rate digital communication systems. Highly integrated receivers. Spectrally efficient dc-free modulation scheme. IEEE Communications magazine 38, 11 (2000). FO UPD DENG-II Article