Title :
History-Based Adaptive Modulation for a Downlink Multicast Channel in OFDMA Systems
Author :
Wang, Haibo ; Schwefel, Hans Peter ; Toftegaard, Thomas Skjodeberg
Author_Institution :
Aalborg Univ., Aalborg
fDate :
March 31 2008-April 3 2008
Abstract :
In this paper we investigated the adaptive modulation strategies for Multicast service in orthogonal frequency division multiple access systems. We defined a Reward function as the performance optimization target and developed adaptive modulation strategies to maximize this Reward function. The proposed optimization algorithm varied the instantaneous BER constraint of each mobile Multicast receiver according to its individual cumulated BER, which resulted in a significant Reward gain.
Keywords :
OFDM modulation; adaptive modulation; frequency division multiple access; multicast communication; OFDMA systems; downlink multicast channel; history-based adaptive modulation; instantaneous BER constraint; mobile multicast receiver; multicast service; orthogonal frequency division multiple access systems; reward function; Bandwidth; Base stations; Bit error rate; Communications Society; Downlink; Fading; Frequency conversion; OFDM modulation; Optimization; Receivers;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.284
