Title :
Implementation and performance of QAM-level-controlled adaptive modulation for land mobile communications
Author :
Hamaguchi, K. ; Kamio, Y. ; Moriyama, E.
Author_Institution :
Digital Commun. Sect., Minist. of Posts & Telecommun., Tokyo, Japan
fDate :
8/28/1997 12:00:00 AM
Abstract :
The hardware implementation and performance of an adaptive modulation system in which a suitable level of quadrature amplitude modulation (QAM) is selected for each time slot are reported for land mobile communications. The authors confirm that the system provides a twofold improvement in spectral efficiency compared to a non-adaptive modulation system
Keywords :
adaptive systems; land mobile radio; quadrature amplitude modulation; QAM-level-controlled adaptive modulation; land mobile communications; spectral efficiency; time slot;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19971055
