Transform Selection Metrics for Interference Suppression

Interfering signals are a common nuisance in wireless communications and may cause performance loss. In addition, overlay systems where non-spread and spreadspectrum systems coexist will become more common in the future. Therefore, the need for versatile interference suppression (IS) systems increases. In conventional transform domain suppression, the interference is excised in some transform domain. These types of systems can be extended by using several domains and choosing the most suitable one based on some selection metric. Herein, two novel domain selection metrics are proposed and the domain selection abilities of these metrics are investigated and compared.