Evaluation of the QoS control through adaptive modulations and interleaving for WMANs

The commercial application of the wireless metropolitan area networks(WMANs) is getting popular worldwide such as the launch of WiBRO and WiMax systems. Quality service in wireless, high-speed data, and multimedia communication for such wider range transmissions has also received much attention. In this paper, we demonstrate how the binary Gray codes can be rearranged to match with the QAM schemes to provide distinct bit error probabilities. While through suitable signal mapping can conquer the phase deviation to some different degrees, we propose using a novel interleaving approach to discern multi-quality transmission that can effectively combat different burst errors caused by phase noise and multipath fading without deteriorating the channel capacity.