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1. A method for a base station to transmit a signal in a heterogeneous network, the method comprising:
transmitting, to a plurality of user equipment, information associated with a weight vector set, the weight vector set including one or more weight vectors that can be applied to reference signals carried by a subsidiary carrier through downlink control signals carried by a primary carrier; transmitting, to the plurality of user equipment, the reference signals to which each of the one or more weight vectors included in the weight vector set has been applied; receiving, from the plurality of user equipment, feedback information associated with channel measurement results for the reference signals; determining weight vector information applied to a downlink signal carried by the subsidiary carrier, the weight vector information determined based on the feedback information, wherein the weight vector information is specific to each user equipment of the plurality of user equipment; transmitting, to each user equipment of the plurality of user equipment, the determined weight information; and transmitting, to each user equipment of the plurality of user equipment, the downlink signal carried by the subsidiary carrier using the determined weight vector information.
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