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Spatial social dilemmas promote diversity
Proceedings of the National Academy of Sciences, 2021Significance Evolutionary branching and diversification in interactions with continuous behavioral traits is important for understanding the emergence of distinct, discrete, and coexisting strategies. In social dilemmas, this suggests an evolutionary pathway for the origin of cooperators and defectors.
Christoph Hauert, Michael Doebeli
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2005
Information theory has long provided a mathematical framework for statistically evaluating the diversity a given signal is able to produce. This paper applies information theory to multi-dimensional spaces, discusses the limits of conventional measures of diversity, and introduces a spatial component into the measure of diversity.
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Information theory has long provided a mathematical framework for statistically evaluating the diversity a given signal is able to produce. This paper applies information theory to multi-dimensional spaces, discusses the limits of conventional measures of diversity, and introduces a spatial component into the measure of diversity.
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Effects of Antenna Correlation on Spatial Diversity and Multiuser Diversity
2008 IEEE Wireless Communications and Networking Conference, 2008This paper investigates the effects of antenna correlations on spatial diversity and multiuser diversity. Using an upper bound on achievable capacity from order statistic theory, we quantify the interactions between spatial correlation, spatial diversity and multiuser diversity.
Haelyong Kim, Wan Choi, Hyuncheol Park
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Transmit diversity as a combination of spatial and delay diversity
2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536), 2002We present performance results of some of the algebraic space-time (ST) block codes based on the combination of Hadamard spreading sequences with rotated constellations. Given a vector x in a rotated constellation in dimension n that has full spatial diversity, we spread each component x/sub j/ of x by a different Hadamard sequence of length n and send
M.O. Damen +2 more
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Spatial Diversity-Achieving Quadrature Spatial Modulation
2018 IEEE International Conference on Automation, Electronics and Electrical Engineering (AUTEEE), 2018Quadrature space modulation (QSM) was viewed recently as a viable multiple-input multiple-output (MIMO) communication technique for next generation wireless system. In this paper, the new scheme achieving spatial diversity of QSM system called SDA-QSM is designed.
Ping Yu, Jianzhong Mao, Fuchun Huang
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Receive spatial coding for distributed diversity
2013 Asilomar Conference on Signals, Systems and Computers, 2013We consider a distributed reception scenario where the transmitter transmits a signal and multiple geographically separated receive nodes forward the processed version (using only a small number of bits) of their received signal to the fusion center.
David J. Love +2 more
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Virtual Spatial Modulation with Diversity Improvement
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall), 2017This paper proposes a novel generalised pre-coding aided spatial modulation (GPSM) scheme, called generalised virtual spatial modulation (GVSM), which performs index modulation on the virtual parallel channels obtained by the singular value decomposition (SVD) of multiple-input multiple-output (MIMO) channels.
Qiang Li 0020 +4 more
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Diversity-Achieving Quadrature Spatial Modulation
IEEE Transactions on Vehicular Technology, 2017In this paper, motivated by the recent concept of quadrature spatial modulation (QSM), we propose a diversity-achieving QSM (DA-QSM) transmission scheme. In the proposed scheme, two sets of dispersion matrices are employed, and $P$ out of $Q$ dispersion matrices are activated in each set.
Lei Wang 0061 +3 more
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Spatially correlated diversity-induced resonance
Physical Review E, 2009Based on recent work [C. J. Tessone, C. R. Mirasso, R. Toral, and J. D. Gunton, Phys. Rev. Lett. 97, 194101 (2006)], the study of coupled bistable oscillators with different sources of diversity is extended. Effects of the correlation between the diversity on the resonant response of the system are discussed.
Dan, Wu, Shiqun, Zhu, Xiaoqin, Luo
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Spatial scaling of microbial eukaryote diversity
Nature, 2004Patterns in the spatial distribution of organisms provide important information about mechanisms that regulate the diversity of life and the complexity of ecosystems. Although microorganisms may comprise much of the Earth's biodiversity and have critical roles in biogeochemistry and ecosystem functioning, little is known about their spatial ...
Jessica L, Green +7 more
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