This thesis explores the process of porting a passive radar system from one SDR to another. Passive radar makes use of existing electromagnetic signals from sources such as TV and mobile phone towers to detect various objects. By leveraging consumer-grade SDRs, which have become increasingly accessible and powerful in recent years, new types of passive radar systems can be created. 

The project involves adapting a passive radar system originally implemented on a KrakenSDR, to an AntSDR, which supports significantly higher bandwidth. This transition necessitates modifications to both the hardware and software setup to accommodate differences in firmware and sampling capabilities between the two SDRs. Through theoretical analysis and practical implementation, I detail required considerations for the passive radar systems' sampling, signal processing, and display.

The performance of the two systems in real-world scenarios is compared, focusing on their ability to detect and track aircraft in the vicinity of the Saab Järfälla site using a digital TV tower as the transmitter.Results demonstrate that the AntSDR system offers improved precision and detection capabilities due to its higher sampling rate, though challenges such as processing time and signal noise persist. This thesis underscores the feasibility and benefits of using modern SDRs for passive radar applications, while highlighting challenges and potential areas for further development.