Analysis of IEMI induced distortion on wireless digital data transmission links

Wireless communication systems are expected to operate reliably as the process of committing critical functions in traffic operations and public safety to wireless communication progresses rapidly. There have been several incidents in the past where wireless transmission systems were affected by electromagnetic interference (EMI). [1] reports cases where police radios and wireless car lock systems were disrupted by exposure to intentional or unintentional EMI. Therefore the implied reliability of these systems has to be rethought. Understanding the exact mechanisms of wireless data link distortion is crucial for identifying weak points and taking the appropriate counter measures to maintain reliable operation. Within this paper a typical wireless system setup is being analysed its susceptibility to EMI in mind.