separation between up link and down link can be changed in certain situations accordingly a ue in accordance with the invention can operate with both fixed and variable duplex this allows the ue to move one of the links without necessarily moving the other this is achieved by providing the ue with logic which allows the ue to switch between fixed and variable duplex 0021 fig2 illustrates a block diagram of a ue in accordance with the invention the receiver portion of the ue includes a front end receiver fe rx 204 that down converts a received signal to a baseband signal rx bb signal and a baseband decoder 206 rx bb that decodes the baseband signal rx bb signal the ue also includes a coder 212 tx bb that generates symbols and pulse shape filters signals to be transmitted by the ue and a front end transmitter fe tx 210 that up converts the baseband tx signal to a radio signal for transmission by antenna 202 furthermore the ue includes logic 208 that allows the ue to switch between fixed and variable duplex logic 208 changes the duplex distance represented by the reference frequencies f fx and f tx known systems with fixed duplex only require one.