Thomas C. Royster IV

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Cognitive radios that are employed in a network with dynamic frequency assignments must operate efficiently in the presence of uncertainties and variations in the propagation characteristics of the network’s communication links. A lowcomplexity adaptive transmission protocol is described and evaluated for use in cognitive radio networks whose links have(More)
We describe similarities and differences between complementary-code-key (CCK) modulation and modulation that is derived from biorthogonal signals, and we present performance results and other information that may be useful to those who have applications for CCK modulation that do not require IEEE 802.11b compliance. The properties and performance of the(More)
Per-hop multi-user detection (PH-MUD) is a general class of techniques for frequency-hopping systems that enable multiple interfering hops to be simultaneously demodulated. Such techniques have the potential to increase the number of supportable users and increase per-user throughput. To realize these gains in actual systems, however, channel estimation(More)