XG DSA Radio System

This paper describes the dynamic spectrum access radio system that was built as part of the DARPA XG program. The DSA system's architecture four principal components (the DSA engine; the environmental sensing (i.e., detection) subsystem; the communications (i.e., radio) subsystem; and a policy module/enforcer) are described. The DSA system's 802.16-based radio hardware is described. One of the field tests related to group sensing is described. A companion paper describes the XG DSA policy software design and field test.