In LTE-A, CoMP has been included in the specification as a technique to deal with inter-cell interference. However, CoMP has only partially convinced industry in the Third Generation Partnership Project (3GPP). The large disparity of performance results on CoMP [1] also highlights the lack of reliability and the high sensitivity of such techniques. Imperfect CSIT among the coordinated/cooperative transmitters is the major issue that impacts CoMP system throughput. RS can be used to enhance the system performance in the multi-cell scenario in the presence of imperfect CSIT.