1. A method for determining an impact factor of a mobile communication system comprising: dividing a detection space defined by an impact factor into a plurality of subsets, wherein each subset of the plurality of subsets is associated with a specific value of the impact factor; blindly detecting at least one reference signal of the detection space; and identifying the specific value of the impact factor upon detecting an existence of the at least one reference signal in the subset associated with the specific value, wherein the impact factor is at least an antenna configuration wherein the detection space is defined by a maximum number of antennas; and wherein a first subset is associated with a first antenna and a second subset is associated with a second antenna; and wherein in case the second antenna could be identified, then it is assumed that both the first and second antennas exist, and in case the second antenna could not be identified, then it is assumed that only the first antenna exists.