Search Results - "Royster, Thomas"

Spectrum Monitoring During Reception in Dynamic Spectrum Access Cognitive Radio Networks by Boyd, S. W., Frye, J. M., Pursley, M. B., Royster, T. C.

“…If a frequency band has primary and secondary users, then the cognitive radios of the secondary users must monitor the band and be prepared to cease their…”
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Uplink NOMA for Heterogeneous NTNs with LEO Satellites and High-Altitude Platform Relays by Bliss, Matthew, Block, Frederick J., Royster, Thomas C., Love, David J.

“…An uplink non-orthogonal multiple-access communication system is developed for heterogeneous non-terrestrial networks (NTNs) that employ both low-Earth orbit…”
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Receiver Diversity in LEO Satcom Constellations by Gaydos, Matthew, Block, Frederick J., Royster, Thomas C., Love, David J.

“…Low-earth orbit (LEO) satellites can enable connectivity for simple, low-power user terminals and have been a significant point of research for upcoming 6G…”
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Low-Complexity Adaptive Transmission for Cognitive Radios in Dynamic Spectrum Access Networks by Pursley, M.B., Royster, T.C.

“…Cognitive radios that are employed in a network with dynamic frequency assignments must operate efficiently in the presence of uncertainties and variations in…”
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Performance considerations for protected wideband satcom by Royster, Thomas C., Streitman, James

“…There is increased interest in using transponded payloads to provide jam-resistant links to users. In the type of system we consider, multiple user terminals…”
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Properties and performance of the IEEE 802.11b complementary-code-key signal sets by Pursley, M., Royster Iv, T.

“…We describe similarities and differences between complementary-code-key (CCK) modulation and modulation that is derived from biorthogonal signals, and we…”
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High-rate direct-sequence spread spectrum with error-control coding by Pursley, M.B., Royster, T.C.

“…High-rate direct-sequence spread spectrum is a modulation technique in which most or all of the spreading is provided by nonbinary data modulation. For…”
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Bit and symbol error rates for complementary code key modulation with alternative bit mappings by Pursley, M.B., Royster, T.C.

“…Full-rate modulation in the IEEE 802.11b standard employs complementary code keying (CCK) with a set of 256 signals that provides 11 Mb/s in favorable indoor…”
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Alternatives for Supporting Multiple Cryptographically-Isolated User Groups in Frequency-Hopping Systems by Block, Frederick J., Qiu, David, Royster, Thomas C.

“…Most traditional coded and interleaved frequency-hop systems either avoid multiple-access interference through the use of orthogonal hopping patterns or…”
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CCK modulation: beyond Wi-Fi by Pursley, M.B., Royster, T.C.

“…The full-rate IEEE 802.11b standard for wireless local area networks, also known as Wi-Fi, employs 256-ary complementary code keying (CCK). For applications…”
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The use and performance of LT codes for multicast with relaying by Tang, Matthew T, Shrader, B, Royster, Thomas C

“…Rateless codes are ideal for wireless communication to mobile nodes because such codes are well suited to time-varying channels. In this paper we examine the…”
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Orchestrating Heterogeneous NTNs: From Stochastic Geometry to Resource Allocation by Bliss, Matthew A., Block, Frederick J., Royster, Thomas C., Brinton, Christopher G., Love, David J.

“…Terrestrial networks face limitations, such as restricted rural broadband coverage and service outages during disasters. To address these challenges,…”
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Network Performance of pLEO Topologies in a High-Inclination Walker Delta Satellite Constellation by Royster, Thomas, Sun, Jun, Narula-Tam, Aradhana, Shake, Thomas

“…Low-earth-orbit satellite constellations with hundreds to thousands of satellites are emerging as practical alternatives for providing various types of data…”
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Failure Resilience in Proliferated Low Earth Orbit Satellite Network Topologies by Shake, Thomas, Sun, Jun, Royster, Thomas, Narula-Tam, Aradhana

“…The vision of continuous network connectivity for users located anywhere on Earth is increasingly being enabled by satellite constellations with hundreds to…”
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Contingent Routing Using Orbital Geometry in Proliferated Low-Earth-Orbit Satellite Networks by Shake, Thomas, Sun, Jun, Royster, Thomas, Narula-Tam, Aradhana

“…Optimum adaptive routing in proliferated low-earth-orbit (pLEO) satellite networks requires intensive computation. The very small size, light weight, and low…”
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Current designs for fast frequency hopping with MFSK by Royster, Thomas C.

“…The performance of many existing communications systems can be improved simply by replacing the currently used forward error correction (FEC) code with a…”
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Phase and power estimation for per-hop multi-user detection in frequency-hopping systems by Qiu, David, Royster, Thomas C., Block, Frederick J.

“…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…”
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Isotope values reveal “canopy effect” in deer territoriality and maize consumption for dogs from archaeological sites in Kentucky dating to the Middle Woodland through Late Fort Ancient time periods by Bonzani, Renée M., Manzano, Bruce L., Davidson, Matthew J., Whitten, Ashley N., White, Jack M., Gauri, Dalton, Royster, Thomas, Guerre, Lisa, Metz, Alexander M., Erhardt, Andrea, Tykot, Robert H.

“…•This study analyzed δ13C, δ15N, and δ18O for 44 animal samples from 13 Kentucky archaeological sites from Middle Woodland to Fort Ancient periods.•Deer likely…”
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Protocols for dynamic spectrum access by Royster, Thomas C

“…Protocols for modulation selection, initial transmitter power adjustment, modulation and coding adaptation, and transmitter power adaptation are presented…”
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Frequency-Hop Antijam Communications with Nonbinary Error-Control Coding by Lin, Shu, Masse, Michael R., Pursley, Michael B., Royster, Thomas C., Song, Shumei

“…Reed-Solomon codes are nonbinary error-control codes that have been employed in military frequency-hop spread-spectrum systems to mitigate the effects of…”
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