Cognitive Radio - A Necessity for Spectrum Pooling
Friedrich K. Jondral · Repository KITopen (Karlsruhe Institute of Technology) · 2006
The demand for wireless communication capacities is continuously growing. This is especially true for cellular and also for wireless local area networks (WLANs). The options for increasing capacity are to apply advanced signal processing technologies in “traditional” frequency regions or to open up higher frequency ranges. The second alternative, however, is somewhat difficult in mobile applications because the radio wave propagation becomes nastier with increasing frequency.