ABSTRACT
Future wireless communication systems have to provide multimedia services to batteryoperated portable terminals. ese systems must eciently utilize the limited bandwidth and power resources to enable high-data-rate high-reliability transmission over wireless fading channels. Adaptive modulation and diversity combining are two of the most important enabling techniques for future wireless communication systems. Adaptive modulation can achieve high spectral eciency over wireless channels [1-3]. e basic idea of adaptive modulation is to match the modulation parameters, such as constellation size and coding rate, to the prevailing fading channel conditions while maintaining the instantaneous error rate below a target value. Usually, the modulation mode is chosen based on the comparison results of received signal strength with
6.1 Introduction .......................................................... 153 6.2 System and Channel Models ...............................156
