Future wireless systems generally may require higher data rates with better coverage for a wide variety of users operating with a large variety of different systems. To achieve these goals, greater power, interference suppression, and multipath mitigation are needed. As users operate at higher data rates, they need higher power for adequate reliability. For higher bandwidths, higher carrier frequencies that have higher propagation and circuit losses are needed. So some way to recover this power must be developed. In addition, interference suppression is needed for higher capacities. Particularly as higher frequency reuse is used to increase capacity, there will be more cochannel interference, which requires greater interference suppression. Finally, multipath mitigation to have more reliable and robust communications is necessary.