Date Added: Mar 2010
Designed to adapt spectrum usage on-the-fly, frequency-agile radios can drastically improve performance of wireless networks. Such flexibility, however, comes with a cost of increased hardware complexity. This motivates one to understand when and why having higher degree of frequency-agility helps and how much improvement it can lead to. In this paper, the authors approach this question by comparing two types of agile radios in the context of dynamic spectrum sharing in any given spectrum chunk. They consider 1-agile radios that use a single frequency channel but can adjust the channel's width and central frequency, and k-agile radios that can combine up to k non-contiguously aligned frequency segments into one transmission.