Hsdpa-Style Adaptive Spread-Spectrum Transceivers and Smart Antenna-Aided Networking

This light-hearted overview is based on an amalgam of the Wiley/IEEE Press monographs, considering the joint benefits of adaptive physical and adaptive network-layer performance enhancement techniques. More specifically, conventional systems would drop a call in progress, if the communications quality falls below the target quality of service and it cannot be improved by handing over to another physical channel. By contrast, the adaptive quadrature amplitude modulation (AQAM) aided transceivers of the near future are expected to simply ´instantaneously drop the throughput, rather than dropping the call´ by reconfiguring themselves in a more robust mode of operation. It is demonstrated that the proposed beam-forming and adaptive transmission techniques may double the expected teletraffic capacity of the system, whilst maintaining the same AVERAGE performance as their conventional fixed-mode counterparts. Further capacity gains may be attained by employing genetic algorithm (GA) aided network-layer schedulers