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The opening of the ultrahigh frequency (UHF) TV band by the Federal Communications Commission for opportunistic operation promises to relieve the demand on the industrial, scientific, and medical (ISM) bands. However, supporting bandwidth-intensive applications over TV white spaces can be quite challenging, due to the unpredictable nature of spectrum availability and the fluctuations in channel quality...
The proliferation of bandwidth-hungry multimedia traffic over IEEE 802.11-based WLANs has over-crowded the ISM bands. The opening of the UHF TV bands by the FCC for unlicensed opportunistic operation promises to relieve the demand on these bands. However, supporting bandwidth-intensive media streaming applications over TV white spaces can be quite challenging. This is due to the unpredictable nature...
Wireless communications are prone to both unintentional and intentional RF interference. Such interference has significant impact on the reliability of packet transmissions. In this paper, we consider interference mitigation in frequency hopping (FH) systems. We employ cognitive radios (CRs) for proactive interference sensing in such systems. Through this proactive approach, we propose a scheme for...
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