A method of processing a composite wideband signal received at a local base station, the composite wideband signal including, over one or more frequency groups, at least one local signal associated with a locally scheduled user and at least one desired signal associated with a desired user scheduled by a neighboring base station, wherein the local base station receives scheduling information for the at least one desired user from the corresponding neighboring base stations, the method comprising: estimating a combined local signal comprising all local signals in the composite wideband signal based on local scheduling information, wherein: the local scheduling information allocates a unique set of local frequencies to each of the locally scheduled users; the received scheduling information allocates a set of desired frequencies to each of the desired users; and at least one of the sets of desired frequencies allocated to one desired user at least partially overlaps at least one of the sets of local frequencies allocated to one locally scheduled user; subtracting the combined local signal from the composite wideband signal to generate a combined desired signal; and determining one or more of the desired signals in the combined desired signal which have sufficient signal strength and signal quality to be detectable as present in the composite wideband signal, based on desired reference sequences allocated to the one or more desired users as indicated by the received scheduling information; wherein determining the one or more desired signals comprises: correlating the combined desired signal with each desired reference sequence to generate a desired signal estimate and a quality estimate for each desired user; comparing each desired signal estimate to a threshold; and for each desired signal estimated that satisfies the threshold condition, detecting one or more of the desired signals based on the corresponding quality estimate; wherein detecting the desired signals based on the corresponding quality estimate comprises identifying each desired signal whose desired signal estimate meets or exceeds the threshold and whose quality estimate satisfies a quality requirement as a detected desired signal. estimating a combined local signal comprising all local signals in the composite wideband signal based on local scheduling information, wherein: the local scheduling information allocates a unique set of local frequencies to each of the locally scheduled users; the received scheduling information allocates a set of desired frequencies to each of the desired users; and at least one of the sets of desired frequencies allocated to one desired user at least partially overlaps at least one of the sets of local frequencies allocated to one locally scheduled user; the local scheduling information allocates a unique set of local frequencies to each of the locally scheduled users; the received scheduling information allocates a set of desired frequencies to each of the desired users; and at least one of the sets of desired frequencies allocated to one desired user at least partially overlaps at least one of the sets of local frequencies allocated to one locally scheduled user; subtracting the combined local signal from the composite wideband signal to generate a combined desired signal; and determining one or more of the desired signals in the combined desired signal which have sufficient signal strength and signal quality to be detectable as present in the composite wideband signal, based on desired reference sequences allocated to the one or more desired users as indicated by the received scheduling information; wherein determining the one or more desired signals comprises: correlating the combined desired signal with each desired reference sequence to generate a desired signal estimate and a quality estimate for each desired user; comparing each desired signal estimate to a threshold; and for each desired signal estimated that satisfies the threshold condition, detecting one or more of the desired signals based on the corresponding quality estimate; wherein detecting the desired signals based on the corresponding quality estimate comprises identifying each desired signal whose desired signal estimate meets or exceeds the threshold and whose quality estimate satisfies a quality requirement as a detected desired signal. correlating the combined desired signal with each desired reference sequence to generate a desired signal estimate and a quality estimate for each desired user; comparing each desired signal estimate to a threshold; and for each desired signal estimated that satisfies the threshold condition, detecting one or more of the desired signals based on the corresponding quality estimate; wherein detecting the desired signals based on the corresponding quality estimate comprises identifying each desired signal whose desired signal estimate meets or exceeds the threshold and whose quality estimate satisfies a quality requirement as a detected desired signal.