Results 271 to 280 of about 106,664 (319)
Advanced Healthcare Materials, EarlyView.Gonzalez Martinez and collaborators develop a strategy to formulate high performance GelMA‐based bioinks with low solids contents. The resulting bioinks enable 3D bioprinting at 37 °C of high‐fidelity structures with tunable mechanical properties that support high cell viability and function.
David A. González‐Martínez +8 more
wiley +1 more source
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IEEE Vehicular Technology Magazine, 2009
In this article, we are interested in an important paradigm of secondary systems known as cognitive radio (CR) networks where the secondary terminals are envisioned to be capable of sensing and reasoning about the operating radio environments and thereby autonomously adjusting their transceiver parameters to exploit the underutilized radio resources in
Xuemin Hong +4 more
openaire +2 more sources
In this article, we are interested in an important paradigm of secondary systems known as cognitive radio (CR) networks where the secondary terminals are envisioned to be capable of sensing and reasoning about the operating radio environments and thereby autonomously adjusting their transceiver parameters to exploit the underutilized radio resources in
Xuemin Hong +4 more
openaire +2 more sources
Computation in Noisy Radio Networks
SIAM Journal on Discrete Mathematics, 2005Summary: We examine noisy radio (broadcast) networks in which every bit transmitted has a certain probability of being flipped. Each processor has some initial input bit, and the goal is to compute a function of these input bits. In this model, we show a protocol to compute any threshold function using only a linear number of transmissions.
Eyal Kushilevitz, Yishay Mansour
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Radio Resource Tomography of Cognitive Radio Networks
VTC Spring 2009 - IEEE 69th Vehicular Technology Conference, 2009Cognitive radio (CR) is promising toward future wireless communication. By incorporating co-existing primary system(s) and CRs into a cognitive radio network (CRN), it is possible to significantly enhance overall spectrum efficiency, provided that CRs can precisely explore appropriate spectrum and network activities, which we call CRN tomography by ...
Chung-Kai Yu, Kwang-Cheng Chen
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A Radio Independent Network – the Enabler for Software Radio
European Transactions on Telecommunications, 1999AbstractSoftware radio will likely have a significant role to play in third generation mobile systems. The first tentative steps towards identifying the impact of software radio on a mobile network have already been taken in the RAINBOW project. This paper will consider network issues related to the software radio concept.
Ermanno Berruto +2 more
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On the connectivity of radio networks
IEEE Transactions on Information Theory, 1991The connectivity of a two-dimensional radio network as a function of the range of the transmitters is still an open problem. It has bee conjectured that the critical range of this problem is the same as the one for the covering problem. The analysis of the one-dimensional problem makes it clear that situations can exist where these two ranges are ...
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On reliable broadcast in a radio network
Proceedings of the twenty-fourth annual ACM symposium on Principles of distributed computing, 2005We consider the problem of reliable broadcast in an infinite grid (or finite toroidal) radio network under Byzantine and crash-stop failures. We present bounds on the maximum number of failures that may occur in any given neighborhood without rendering reliable broadcast impossible.
Vartika Bhandari, Nitin H. Vaidya
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Cooperation in Cognitive Radio Networks
2014 Brazilian Symposium on Computer Networks and Distributed Systems, 2014The operation of cognitive radio (CR) networks involves opportunistic access to the spectrum licensed to primary users (PUs) by secondary users (SUs). Traditionally, this access is performed in such a way that the PUs suffer minimal interference to their access to the spectrum, trying to make the SUs as transparent as possible to PUs.
Pedro Smith Coutinho +2 more
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Cognitive radio network management
IEEE Vehicular Technology Magazine, 2008The regulatory agencies have been pushed by the increasing demand for wireless ubiquitous connectivity to be ever more aggressive in providing innovative ways to use spectra efficiently. Driven by these new opportunities, the future radio systems should look for the optimized architecture, circuit, and algorithm as a whole. In this article, it has been
Cheng-Xiang Wang 0001 +3 more
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Photonics for radio access networks
2017 19th International Conference on Transparent Optical Networks (ICTON), 2017In this work we analyse radio access networks (RAN) deployments from the capacity and cost points of view. We find that in order to support the new radio (NR) with system bandwidth of 800MHz and reduce the number of fibre connections between NR and baseband units (BBU) one can use dense wavelength division multiplexing (DWDM), pulse amplitude ...
Gemma Vall-Llosera +3 more
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