Manifold-based interference mitigatation

Summary form only given. There is increasing competition for use of the radio spectrum among the fundamental types of spectrum users: `active' users who transmit radio signals, e.g. voice or data communications, radar surveillance, and Earth remote sensing radars; and `passive' users who operate in receive-only mode, e.g. in radio astronomy and passive remote sensing. Both active and passive users need increasing amounts of spectrum usage; the former is driven by the telecommunications industry which continually invents new uses for active systems, while the latter needs increased spectrum to obtain the increased sensitivity required for new studies and services. As such, there is significant potential for passive services to suffer radio frequency interference from active services, even in bands where the passive services are the primary users. This paper discusses the problem of finding a common descriptor language, i.e. a relevant set of parameters to adequately represent a wide range of spectrum users, e.g. Keplerian orbital elements describe the position and velocity of a an Earth-observing satellite. Preliminary results in the modeling of spectrum users in electrospace and determination of competitive hypervolumes will also be presented.