A Time Division Duplex (TDD) communications system includes at least one base station having a first transmitter and a first receiver, and at least one radiotelephone having a second receiver for receiving a first radio frequency signal from the base station during a reception period and a second transmitter...http://www.google.es/patents/US5564074?utm_source=gb-gplus-sharePatente US5564074 - Power control apparatus and method for a radiotelephone
Power control apparatus and method for a radiotelephone
