융합신호처리학회 학술대회논문집 (Proceedings of the Korea Institute of Convergence Signal Processing)
- 한국신호처리시스템학회 2000년도 하계종합학술대회논문집
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- Pages.69-72
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- 2000
적응 QAM 모뎀의 시간지연에 대한 영향
The Effect of Time Belay on Adaptive QAM Modems
- Y. H. Chung (Dept. of Information and Communications, Dongeui University) ;
- Park, J. O. (Dept. of Information and Communications, Dongeui University)
- 발행 : 2000.08.01
초록
Multilevel modulation schemes are known to be highly bandwidth efficient. By varying modulation level adaptively according to channel conditions (i.e. adaptive QAM schemes or AQAM), high bandwidth efficiency can be achieved. This paper considers the effect of time delay on the adaptive QAM schemes in dispersive fading channels. In order to undertake investigations effectively, a simulator has been developed. The simulation results show that the BER performance obtained for the wideband channel with a delay spread of 0.75
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