A method in a first base station operable in a communications network for performing channel estimation of a first wireless channel between a first wireless device and the first base station; the method comprising: receiving a signal comprising a first component received over the first wireless channel, the first component corresponding to a first reference signal transmitted by the first wireless device to the first base station, and a second component, wherein the second component corresponds to N second reference signals transmitted by N respective second wireless devices to a second base station, where N is greater than or equal to 1; receiving scheduling information, wherein the scheduling information comprises scheduling information according to which each of the N second wireless devices is scheduled to transmit each respective second reference signal to the second base station; generating, based on the scheduling information, N constructed reference signals representative of each of the N second reference signals; and performing channel estimation of the first wireless channel between the first wireless device and the first base station based on the signal and the N constructed reference signals, wherein the step of performing comprises: estimating, based on the signal and the constructed reference signal, the first component of the signal; and performing channel estimation based on the estimated first component, wherein the step of estimating the first component of the signal comprises: a) calculating channel coefficients ĥ i for signals from one of the N second wireless devices as h ^ i = 1 K ∑ m = 0 K − 1 y m s i * m, where m is a subcarrier index, K is the number of subcarriers, s i * m is a complex conjugate of the respective constructed reference signal generated from scheduling information received from the a second base station, and y ( m) is the signal. receiving a signal comprising a first component received over the first wireless channel, the first component corresponding to a first reference signal transmitted by the first wireless device to the first base station, and a second component, wherein the second component corresponds to N second reference signals transmitted by N respective second wireless devices to a second base station, where N is greater than or equal to 1; receiving scheduling information, wherein the scheduling information comprises scheduling information according to which each of the N second wireless devices is scheduled to transmit each respective second reference signal to the second base station; generating, based on the scheduling information, N constructed reference signals representative of each of the N second reference signals; and performing channel estimation of the first wireless channel between the first wireless device and the first base station based on the signal and the N constructed reference signals, wherein the step of performing comprises: estimating, based on the signal and the constructed reference signal, the first component of the signal; and performing channel estimation based on the estimated first component, estimating, based on the signal and the constructed reference signal, the first component of the signal; and performing channel estimation based on the estimated first component, wherein the step of estimating the first component of the signal comprises: a) calculating channel coefficients ĥ i for signals from one of the N second wireless devices as h ^ i = 1 K ∑ m = 0 K − 1 y m s i * m, where m is a subcarrier index, K is the number of subcarriers, s i * m is a complex conjugate of the respective constructed reference signal generated from scheduling information received from the a second base station, and y ( m) is the signal. a) calculating channel coefficients ĥ i for signals from one of the N second wireless devices as h ^ i = 1 K ∑ m = 0 K − 1 y m s i * m, where m is a subcarrier index, K is the number of subcarriers, s i * m is a complex conjugate of the respective constructed reference signal generated from scheduling information received from the a second base station, and y ( m) is the signal.