Date Added: Jun 2009
In this paper, the authors propose an Adaptive Coded Modulation (ACM) with multi-levels qualities of service analysis, which can be used to perform physical layer functions in software radio receivers for beyond third generation systems. ACM approche employs multiple coding and modulation schemes in order to adapt instantaneously spectral efficiency to the Signal-to-Noise Ratio variations SNR. The idea is to study transmission schemes performance which allows dynamic bandwidth sharing among various services in multimedia mobile and wireless networks in different channel environments. The aim is to select the appropriate modulation and channel coding modes based on signal quality measurement via a Decision Feedback Block (DFB). Decision taken by the DFB block is based on different QoS parameters that depend in class and type of multimedia traffic.