Co-site Electromagnetic Interference Troubleshooting and Validation of Suppressing Performance by Extrapolation Method Ma Xie Southwest Communication Institute, Postbox 810, Chengdu, CHINA E-mail:
[email protected] Abstract Co-site interference is becoming an increasingly significant problem in electronic systems. Ever increasing demand for more sophisticated, higher performance communication systems on one hand and the need for high density integrations in congested electromagnetic environments on the other have introduced numerous challenges to system designers. In this paper, the procedure of troubleshooting interference from vehicle to co-site radio system is detailed, and an approach for suppressing the interference is proposed. With the equivalent experiment and extrapolation method, the efficacy of suppressing is easily and effectively predicted. Also the signal coverage test and error analysis of prediction are reported. 1. Introduction The modern military operations and emergency communication for rescue have created the need for more co- operation and higher efficiency. Thus, the lightweight wheeled vehicle integrated kinds of electronic systems forms the high-mobility unit with multi-function. Since last two decades, the high mobility multi-purpose wheeled vehicle has been widely used in both military and civil rescue. There has been much effort put into the design of radio systems and antennas in order to increase the wireless signal coverage during the past years. But meanwhile, the co-site Electro- Magnetic Interference (EMI) caused by the close proximity of antennas mounted on a space limited vehicle, has become a significant problem. Issues associated with co-site interference are multifold. Techniques to mitigate such effects are thus critical for ensuring reliable communications.