In this topic1, we continue our Tech Topic #7 discussion of
software radio in a public safety application, but expand on the
application to take advantage of the flexibility and
adaptability of software defined radio (SDR). As previously
suggested, the evolution of multi-band, multi-mode and multi-
protocol radios has already contributed to the adoption of SDR
technologies in various communications applications. The
examples cited include dynamic frequency selection (DFS) and
transmit power control (TPC); technologies that have already
been adopted by FCC rules and implemented in various systems and
equipments that are in common practice today. These technologies
illustrate the dynamic and adaptive nature that software
implementations bring to modern radio design. The key word now
is flexibility based on software implementation of radio
functionality. With SDR as an implementation strategy, cognitive
radio (CR) has become an emerging advanced radio technology that
enables a radio device to monitor, sense, dete