A communications system operating in a frequency band, comprising: a base station serving a small cell with selective filtering, wherein the base station serving the small cell with selective filtering comprises a first receiver front end and a first transmitter front end, wherein the first transmitter front end comprises a first selective filter, wherein the first receiver front end comprises a second selective filter, wherein each of the first selective filter and the second selective filter comprises a first three port filter coupled to a first single pole double throw, SPDT, switch, wherein the first three port filter comprises two passbands, where one of the two passbands is in a first sub-band, and wherein the first SPDT switch in each of the first selective filter and the second selective filter is set to select the first sub-band; a backhaul wireless modem with selective filtering coupled to the base station serving the small cell, wherein the backhaul wireless modem with selective filtering comprises a second receiver front end and a second transmitter front end, wherein the second transmitter front end comprises a third selective filter, wherein the second receiver front end comprises a fourth selective filter, wherein each of the third selective filter and the fourth selective filter comprises a second three port filter coupled to a second SPDT switch, wherein the second three port filter comprises the two passbands, and wherein the second SPDT switch in each of the third selective filter and the fourth selective filter is set to select a second sub-band; wherein the base station serving the small cell with selective filtering is configured to only transmit and receive in the first sub-band of the frequency band through a first interface configured to facilitate communications with user equipment when the backhaul wireless modem with selective filtering is respectively receiving and transmitting in the second sub-band of the frequency band through a second interface configured to facilitate communications with macro cell; wherein the backhaul wireless modem with selective filtering is configured to only transmit and receive in the second sub-band when the base station serving the small cell is respectively receiving and transmitting in the first sub-band; and wherein the first sub-band and the second sub-band are adjacent. a base station serving a small cell with selective filtering, wherein the base station serving the small cell with selective filtering comprises a first receiver front end and a first transmitter front end, wherein the first transmitter front end comprises a first selective filter, wherein the first receiver front end comprises a second selective filter, wherein each of the first selective filter and the second selective filter comprises a first three port filter coupled to a first single pole double throw, SPDT, switch, wherein the first three port filter comprises two passbands, where one of the two passbands is in a first sub-band, and wherein the first SPDT switch in each of the first selective filter and the second selective filter is set to select the first sub-band; a backhaul wireless modem with selective filtering coupled to the base station serving the small cell, wherein the backhaul wireless modem with selective filtering comprises a second receiver front end and a second transmitter front end, wherein the second transmitter front end comprises a third selective filter, wherein the second receiver front end comprises a fourth selective filter, wherein each of the third selective filter and the fourth selective filter comprises a second three port filter coupled to a second SPDT switch, wherein the second three port filter comprises the two passbands, and wherein the second SPDT switch in each of the third selective filter and the fourth selective filter is set to select a second sub-band; wherein the base station serving the small cell with selective filtering is configured to only transmit and receive in the first sub-band of the frequency band through a first interface configured to facilitate communications with user equipment when the backhaul wireless modem with selective filtering is respectively receiving and transmitting in the second sub-band of the frequency band through a second interface configured to facilitate communications with macro cell; wherein the backhaul wireless modem with selective filtering is configured to only transmit and receive in the second sub-band when the base station serving the small cell is respectively receiving and transmitting in the first sub-band; and wherein the first sub-band and the second sub-band are adjacent.