System-Level Modeling and Evaluation of Interference Suppression Receivers in LTE System

In this paper we study the performance of linear interference suppression receivers which estimate the interference covariance either from the data symbols or from the reference symbols. For numerical radio system-level simulation purposes, receiver algorithm models are proposed which take into account practical estimation losses caused by the channel and interference covariance estimation. These models are verified using a multi-link simulator, and finally the performance of the receivers is studied using radio system simulations. The results indicate that the algorithm based on the reference symbols can constantly outperform a receiver that assumes white inter-cell interference. Furthermore the modeling proposed in the paper can be utilized in assessing radio system performance when receivers are equipped with interference suppression receivers.