Fundamental limits and possibilities for future telecommunications

Using fundamental physical and information theoretical relations, we have c onsidered fundamental capacity limits and possibilities of fiber optical, c ellular radio, and satellite communication systems. In a fiber to the home scenario more than 1 Gb/s equivalent circuit-switched capacity may well be feasible in the future. In a microwave cellular or satellite radio network for mobile subscribers it may well be feasible, although requiring low-cost very advanced electronics, to reach several tens of megabits per second.