A radio frequency front-end system includes an FDD duplexer. a receive amplifier amplifies a filtered receive signal output by the duplexer to output an amplified receive signal. the receive amplifier including a first amplified output and a second amplified output. A first noise filter connected to the first amplified output and having a stopband corresponding to the transmit channel. A switch selectively outputs either 1) the receive signal filtered by the noise filter or 2) the second amplified output.

According to aspects, a BS may determine presence of a narrow GB or lack of a GB to separate a first RB used for DL transmission from the BS to a first UE and a second RB used for DL transmission from the BS to a second UE. In response to the determination, the BS may transmit, to the first UE, interference information associated with the transmission from the BS to the second UE. According to aspects, a BS may determine a presence of a narrow GB or lack of a GB to separate a first RB used for UL transmission from a first UE to the BS and a second RB used for UL transmission from a second UE to the BS. In response to the determination, the BS may transmit to the first UE, interference information associated with the UL transmission from the second UE to the BS.