Signal processing is a common part of the modern society used to obtain high functionality in a vast number of applications. As the development of advanced electronics and powerful computers continue, the limit of the functionality in many systems is increased. Furthermore, as the signal processing can be performed on digitalized signals more advanced methods and algorithms can be employed and enhance the results. In radio-based astronomy a new window of discovery against space has opened using digitally based antenna array systems to observe signals with spectral contents ranging up to a major part of the VHF-band. This enables a high degree of flexibility and incorporates several areas e.g. radio astronomy, signal proce...