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Spectrum availability is a decisive factor for the continuity of Cognitive Network (CN) broadcast. Cognitive networks lease the spectrum temporarily whenever the primary users went off. Thus, localized wireless changes within CN cells rapidly affect the transmissions of the cognitive radios. This situation becomes more complicated for cognitive mesh networks when establishing a link over many cells...
A radio-over-fiber RF front end is being developed for multi-band operation covering 700 MHz, 2.4 GHz and 60 GHz. The RF front-end of the system was implemented on FR4 substrate and the optical part of the system was implemented using commercial components. Initially, a 700 MHz system based on 2.4 GHz WLAN was demonstrated and achieved a 6-Mbps data rate transmission over a 4-km optical link and a...
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