A single port signal repeater, comprising: - a hybrid circuit having an output impedance, wherein the hybrid circuit comprises an input port configured to receive a first signal, a two-way port connected to a transmission line, wherein the two-way port is configured to at least one of (i) receive a third signal from the transmission line, or (ii) based on the first signal, transmit the third signal to the transmission line, an output port isolated from the input port, wherein the output port is configured to output a second signal based on (i) the first signal and (ii) the third signal, and an adaptive filter configured to, based on the first signal, adapt the output impedance of the hybrid circuit to match an impedance of the transmission line, wherein the single port signal repeater is connected in parallel with the transmission line without interrupting the transmission line, and wherein the single port signal repeater accesses the transmission line via a single access point; and - an amplifier, comprising: an output connected to the input port of the hybrid circuit and an input connected to the output port of the hybrid circuit, wherein the output of the amplifier is configured to output the first signal and wherein the input of the amplifier is configured to receive the second signal. - a hybrid circuit having an output impedance, wherein the hybrid circuit comprises an input port configured to receive a first signal, a two-way port connected to a transmission line, wherein the two-way port is configured to at least one of (i) receive a third signal from the transmission line, or (ii) based on the first signal, transmit the third signal to the transmission line, an output port isolated from the input port, wherein the output port is configured to output a second signal based on (i) the first signal and (ii) the third signal, and an adaptive filter configured to, based on the first signal, adapt the output impedance of the hybrid circuit to match an impedance of the transmission line, wherein the single port signal repeater is connected in parallel with the transmission line without interrupting the transmission line, and wherein the single port signal repeater accesses the transmission line via a single access point; and an input port configured to receive a first signal, a two-way port connected to a transmission line, wherein the two-way port is configured to at least one of (i) receive a third signal from the transmission line, or (ii) based on the first signal, transmit the third signal to the transmission line, (i) receive a third signal from the transmission line, or (ii) based on the first signal, transmit the third signal to the transmission line, an output port isolated from the input port, wherein the output port is configured to output a second signal based on (i) the first signal and (ii) the third signal, and (i) the first signal and (ii) the third signal, and an adaptive filter configured to, based on the first signal, adapt the output impedance of the hybrid circuit to match an impedance of the transmission line, wherein the single port signal repeater is connected in parallel with the transmission line without interrupting the transmission line, and wherein the single port signal repeater accesses the transmission line via a single access point; and - an amplifier, comprising: an output connected to the input port of the hybrid circuit and an input connected to the output port of the hybrid circuit, wherein the output of the amplifier is configured to output the first signal and wherein the input of the amplifier is configured to receive the second signal. an output connected to the input port of the hybrid circuit and an input connected to the output port of the hybrid circuit,