A transceiver for use in a wireless access network comprising a plurality of base stations, each of the plurality of base stations capable of bidirectional time division duplex (TDD) communication with wireless access devices disposed at a plurality of subscriber premises in a corresponding cell site...http://www.google.de/patents/US20020136170?utm_source=gb-gplus-sharePatent US20020136170 - Wireless access system using selectively adaptable beam forming in TDD frames and method of operation
