Design av stimuligenerator för radarmålsökare
During the development of microwave based sensors such as radar target seekers, input signals are needed to verify the performance of the system. Therefore, a channel board has been developed by previous thesis projects at Saab Bofors Dynamics. It uses a technique called Digital Radio Frequency Memory (DRFM). The purpose of this board is to sample and digitally store radio frequency signals in order to reconstruct them after a certain delay.The aim of this thesis project was to use the channel board named above to construct a portable instrument for generation of stimuli signals. This assignment has been divided into two tasks: firstly, to construct and put together the hardware components and secondly, to implement a graphical user interface for the instrument. An embedded computer from VIATechnologies with the form factor Nano-ITX was chosen. Since Ethernet is the communication interface on the channel board, a commercial network router was used establish the connection between the channel board and the computer. In order to simplify future development the first step was to implement device drivers that support all functions of the channel board. These drivers where then used for the design of a graphical user interface.The result of this project was a portable stimuli generator with a graphical user interface which can be used for target echo generation as well as a generic signal generator. The functionality of the instrument was verified through generation of known signal patterns which were measured and proven to be correct with a digital oscilloscope.