As one of the most powerful tools in game theory, double auction is widely utilized to tackle spectrum allocation problem a secondary market. In this paper, we propose multi-unit framework which conflict graph-based bidder group formation, winner determination strategy, and pricing are elaborately designed. Through an in-depth theoretical analysis, prove that our scheme can achieve three critical properties including individual rationality, ex-post budget balance, truthfulness. Extensive...

A compact miniaturised‐element frequency selective surface (FSS) is proposed for size reduction. The structure can be considered as a common square‐loop slots FSS overlaid with periodic array of metallic patches mounted on an ultra‐thin dielectric layer. larger coupling capacitance brought in each overlap area between the two layers parallel films. theoretical analysis and simulation results, together measured demonstrate that much better compactness characteristic realised FSS.

A peak‐to‐peak (P‐to‐P) search‐based single source direction of arrival estimation is proposed. The P‐to‐P method aims to search only at each local minima a least square cost function, thus quickly acquiring the global optimal solution relative exhaustive grid search. Performance comparisons with existing methods verify that proposed achieves high accuracy, possesses low signal‐to‐noise ratio threshold and computational can be applicable any non‐uniform linear array.

Mobile edge computing (MEC) powered by unmanned aerial vehicles (UAVs), with the advantages of flexible deployment and wide coverage, is a promising technology to solve computationally intensive communication problems. In this paper, an orthogonal time frequency space (OTFS)-based UAV-assisted MEC system studied, in which OTFS used mitigate Doppler effect UAV high-speed mobile communication. The weighted total energy consumption minimized jointly optimizing division, CPU allocation, transmit...

Multicarrier phase ranging (MCPR) technique has been widely used in radio navigation, telemetry, radar, and many other fields. In an MCPR system, unique range estimation can be obtained within only the so-called unambiguous distance (UD) because of ambiguity. As a metric gauging, measurable UD well studied under two common configurations: linearly spaced frequencies proportionally frequencies. this paper, we propose to apply frequency hopping (FH) waveform systems for enhanced antijamming...

In this paper, we study the analytic connectivity of a $k$-uniform hypergraph $H$, denoted by $\alpha(H)$. addition to computing complete $k$-graph, present several bounds on that relate it with other graph invariants, such as degree, vertex connectivity, diameter, and isoperimetric number.

The Unmanned Aerial Vehicles (UAVs)-enabled Mobile Edge Computing (U-MEC) system, which is a hot research point, has been reckoned as an effective way to deal with the digital big bang. Considering relationship between users and U A V, this paper proposes - MEC application scenario based on contractual revenue scheme enhance efficiency of energy utilization incentive UAV serve for noncontracted users. We jointly optimize UAV's service user set, communication resources trajectory under...

The beat radio interferometry (BRI) is a novel ranging scheme that achieves high accuracy with low-cost devices. A major problem BRI the lack of an efficient range estimation method valid in general measurement configurations and accommodates large-scale scenarios. In this paper, we present new model reveal it equivalent to single tone frequency estimation. Such revelation has two natural outcomes: first Cramer-Rao lower bound (CRLB) estimation; second fast Fourier transform (FFT)-based...

Multi-circular SAR (MCSAR) maintains the transmitted signal beam still pointing to same observing scene, and platform continually watches around scene many times in a general way, which can achieve three-dimensional characteristics of target for all directions is hotspot CSAR imaging research. A reasonable flight path prerequisite MCSAR imaging. In this article, wavenumber spectrum support domain derived from echo model frequency-modulated continuous wave (FMCW) system. The with fixed...