A method In a radio base station of assisting one or more neighbour radio base stations in UL signal reception, wherein time at the radio base station is structured into a series of time slots and that are grouped into frames that each include a sequence of predefined number of the time slots, the method comprising the steps of: - serving a first group of UE with communication over a frequency carrier; - controlling timing of signal transmission from the first group of UE to be aligned at arrival at the radio base station, by sending a time alignment value to any UE in the first group whose signal is misaligned at arrival; - Fourier processing time domain signal samples of the frequency carrier, with timing of the Fourier processing adjusted to the timing of arrival of signals from the first group of UE, and thereby producing Fourier processed samples relating to the first group of UE; characterized in that said method comprises the further steps of: - receiving a request from one or more of said neighbour base stations to provide Fourier processed signal information, relating to a second group of two or more UE that is/are served by the requesting neighbour base station/s wherein the signals from the second group of UE arrive at the radio base station non-aligned with the signal/s of the first group of UE, and wherein the second group UE relates to two or more timing sub-groups with respect to the arrival timing at the radio base station of their signals; - Fourier processing time domain signal samples of the frequency carrier with timing adjusted to the arrival of signal/s from the second group UE, thereby producing Fourier processed signal information relating to the second group UE, and the timing of the Fourier processing of the second group UE is not the same in all time slots of the frame; and - sending the Fourier processed signal information that relates to the second group UE to the requesting neighbour radio base station/s. - serving a first group of UE with communication over a frequency carrier; - controlling timing of signal transmission from the first group of UE to be aligned at arrival at the radio base station, by sending a time alignment value to any UE in the first group whose signal is misaligned at arrival; - Fourier processing time domain signal samples of the frequency carrier, with timing of the Fourier processing adjusted to the timing of arrival of signals from the first group of UE, and thereby producing Fourier processed samples relating to the first group of UE; - receiving a request from one or more of said neighbour base stations to provide Fourier processed signal information, relating to a second group of two or more UE that is/are served by the requesting neighbour base station/s wherein the signals from the second group of UE arrive at the radio base station non-aligned with the signal/s of the first group of UE, and wherein the second group UE relates to two or more timing sub-groups with respect to the arrival timing at the radio base station of their signals; - Fourier processing time domain signal samples of the frequency carrier with timing adjusted to the arrival of signal/s from the second group UE, thereby producing Fourier processed signal information relating to the second group UE, and the timing of the Fourier processing of the second group UE is not the same in all time slots of the frame; and - sending the Fourier processed signal information that relates to the second group UE to the requesting neighbour radio base station/s.