e main difference between SLIC and CWIC is LTE Small Cell Optimization whether the subtracted signal is reconstructed based on the output of the LMMSE filter, that is, modulation symbol based, or based on the output of the turbo decoder, that is, codeword based, respectively. Having covered some basic aspects of the advanced receiver structures, in the following we will focus on the interference structure which is needed by these receivers in the process of reconstructing it prior to the IC stage. Note that CWIC is dropped from this discussion due to the high complexity and more detailed information such receiver needs regarding the interference, as decoding the interferer requires information of the modulation and coding scheme, not only on modulation type, as needed by the symbol-based receivers. The interfering PDSCH is characterized by more static, network topology-oriented parameters (such as system bandwidth, cell ID, number of CRS antenna ports, MBSFN configuration) and by more dynamic parameters which are related to the spatial structure and link adaptation of the interference, such as transmission mode (including rank and PMI), PDCCH length, resource allocation type, modulation order and EPRE (energy per resource element). The NAICS UE would not be able to blindly estimate all the interfering PDSCH characteristics described above as there are practical UE limitations in terms of UE complexity and power consumption. On the other hand, the network cannot signal all these interference characteristics either as the signalling payload would be high while the flexibility of the network operation needs to be preserved. The trade-off is that the NAICS UE is doing blind detection for the more dynamic param- eters. The state-of-the-art NAICS receiver can blindly detect the presence of interference, transmission mode, modulation, PMI, rank and offset. The network is providing, in a semi- static manner, assistance with respect to the more static parameters such as cell ID, number of CRS ports, MBSFN pattern, PB and 