A multiple input multiple output, MIMO, wireless communication system comprising a transceiver unit, a remote radio unit, RRU, and a transport channel coupling the transceiver unit and the RRU, the transport channel comprising a plurality of optical fibers; the transceiver unit, comprising: a digital transceiver configured to generate a data signal and a control signal, the control signal including control information to control analog components on the remote radio unit, RRU; a first modulator configured to modulate the control signal onto a control carrier; a transmit filter configured to filter the modulated control signal; and a combiner configured to combine the data signal and the filtered modulated control signal to a combined signal and send the combined signal to the RRU via a first optical fiber of the transport channel; the RRU comprising: a control unit configured to control components within the RRU according to the control information; an antenna for receiving data; a second modulator configured to receive status information from the control unit and modulate the status information onto a carrier signal generated by a carrier and clock generator; a second combiner to combine the modulated status information and the received data into a single signal for transmission to the transceiver via a second optical fiber of the transport channel; a directional coupler configured to receive the combined signal from the transceiver unit via the first optical fiber and split the combined signal into first and second signals; and a demodulator configured to receive the second signal from the directional coupler via a receive filter, wherein the demodulator is configured to extract the control information from the second signal, wherein the RRU does not comprise a local oscillator, LO, to demodulate the control signal sent from the digital transceiver. a transceiver unit, a remote radio unit, RRU, and a transport channel coupling the transceiver unit and the RRU, the transport channel comprising a plurality of optical fibers; the transceiver unit, comprising: a digital transceiver configured to generate a data signal and a control signal, the control signal including control information to control analog components on the remote radio unit, RRU; a first modulator configured to modulate the control signal onto a control carrier; a transmit filter configured to filter the modulated control signal; and a combiner configured to combine the data signal and the filtered modulated control signal to a combined signal and send the combined signal to the RRU via a first optical fiber of the transport channel; a digital transceiver configured to generate a data signal and a control signal, the control signal including control information to control analog components on the remote radio unit, RRU; a first modulator configured to modulate the control signal onto a control carrier; a transmit filter configured to filter the modulated control signal; and a combiner configured to combine the data signal and the filtered modulated control signal to a combined signal and send the combined signal to the RRU via a first optical fiber of the transport channel; the RRU comprising: a control unit configured to control components within the RRU according to the control information; an antenna for receiving data; a second modulator configured to receive status information from the control unit and modulate the status information onto a carrier signal generated by a carrier and clock generator; a second combiner to combine the modulated status information and the received data into a single signal for transmission to the transceiver via a second optical fiber of the transport channel; a directional coupler configured to receive the combined signal from the transceiver unit via the first optical fiber and split the combined signal into first and second signals; and a demodulator configured to receive the second signal from the directional coupler via a receive filter, wherein the demodulator is configured to extract the control information from the second signal, wherein the RRU does not comprise a local oscillator, LO, to demodulate the control signal sent from the digital transceiver. a control unit configured to control components within the RRU according to the control information; an antenna for receiving data; a second modulator configured to receive status information from the control unit and modulate the status information onto a carrier signal generated by a carrier and clock generator; a second combiner to combine the modulated status information and the received data into a single signal for transmission to the transceiver via a second optical fiber of the transport channel; a directional coupler configured to receive the combined signal from the transceiver unit via the first optical fiber and split the combined signal into first and second signals; and a demodulator configured to receive the second signal from the directional coupler via a receive filter, wherein the demodulator is configured to extract the control information from the second signal, wherein the RRU does not comprise a local oscillator, LO, to demodulate the control signal sent from the digital transceiver.