1. In a digital communication system, a method for communicating comprising the steps of: transmitting signals from one or more transmitter antenna elements; receiving said signals from via a plurality of receiver antenna elements; wherein separation of radiation patterns among either said transmitter antenna elements or said receiver antenna elements is insufficient to establish completely isolated spatial directions for communication; and wherein at least one of said transmitting and receiving steps comprises processing said signals to increase isolation between spatial directions employed for communication at a common frequency.