Smart base stations for "dumb" time-division duplex terminals

Users of mobile IT systems are calling for ever higher data rates, but such mobile radios are subject to multipath fading and intersymbol interference , often calling for complex equalizers at both ends of each link. Where the links are of short range, they often use time-division duplex. This articl e demonstrates how this option permits much of the complexity of channel ma tching and equalization to be transferred from post-processing at the many sparsely used mobile terminals to a few intensively used preprocessors at t he base station or central hub.