25 papers · ranked by Valyu relevance
Shuqing Lin, Yanfei Zhu, Zhi Yang, Fuchun Huang
Spatial index modulation, which utilizes the antenna spatial domain to exploit the additional information, is a promising technique for improving the spectral efficiency in next wireless communication network. In this paper, to exploit more additional information from the antenna spatial domain, with the dimensions of…
Yanfei Zhu, Fuchun Huang, Zhili Zhou, Zhi Yang
In this paper, a new schematic of spatial channel modulation aided space-time block code (STBC-SCM), which is to exploit more additional information with both the hybrid constellations group indexes (CGI) and the channel state indexes, is proposed to achieve the higher spectral efficiency and the improvement of the bit…
Kaihe Wang, Ran Yang, Lipeng Zhu, Rongyan Xi + 2 more
—Movable antenna (MA) has demonstrated great potential in enhancing wireless communication performance. In this paper, we investigate an MA-enabled multiple-input multipleoutput (MIMO) communication system with spatial modulation (SM), which improves communication performance by utilizing flexible MA placement while…
Xusheng Zhu, Kai-Kit Won, Hanjiang Hong, Chenguang Rao + 1 more
This paper considers a single-input multiple-output (SIMO) setup with a fluid antenna system (FAS) at the transmitter side and multiple fixed antennas at the receiver, which is referred to as a Tx-SIMO-FAS. We investigate the use of spatial modulation (SM) utilizing the FAS on a single radio-frequency (RF) chain while…
Li, Shiyuan, Yan, Baojiang + 12 more
—Reconfigurable Intelligent Surface (RIS)-based direct modulation communication systems have garnered significant attention due to their low cost, low power consumption, and baseband-less characteristics. However, these systems face challenges such as the random time-varying coding state of the RIS and the difficulty…
Dirk van Moorselaar, Stefan Van der Stigchel
The visual system can flexibly adjust attentional deployment to match task demands, but whether observers can proactively modulate the spatial scope of attention based on expectations about upcoming search difficulty remains unclear. According to the zoom lens model, attention can narrow or broaden its spatial extent…
Kentaro Nagaya, Shinya Sugiura
This paper proposes a novel cyclic-prefixed single-carrier transmission scheme that amalgamate a reconfigurable intelligent surface (RIS) with spatial modulation in the frequency-selective fading channel. The discrete-input continuous-output memoryless channel's~(DCMC) capacities of the proposed schemes are formulated…
Yong Min Choi, Viola S. Störmer
How does the auditory system implement spatial selection without a dedicated cortical map for space? One hypothesis holds that auditory spatial attention draws on a supra-modal network including the parietal-occipital cortex; an alternative implicates subcortical structures (e.g., superior colliculus) with no direct…
Zhicheng Shen, Sajjad Taravati, Jize Yan
In modern wireless communication systems, data transmission is achieved through the collaboration of digital modulation circuits and antennas. Digital baseband signals are first modulated in terms of amplitude, frequency, and phase of the carrier wave and then transmitted directionally via antennas. However, in…
Nuo Liu, Aiping Zhai, Tingting Zheng, Wenjing Zhao + 1 more
Wavefront single-pixel imaging (WSPI) has emerged as a promising approach for simultaneous amplitude and phase reconstruction, especially in spectral wavebands where cameras are immature or even unavailable. However, conventional WSPIs suffer from limited imaging speed & range, and heavy pattern-data storage. Here, we…
Rishikesan Maran, James M. Shine, Ben D. Fulcher, Eli J. Müller
Stimulus-evoked cortical responses range from tightly localized activations to spatially extended traveling waves, yet the mechanisms through which these distinct regimes are flexibly recruited remain unclear. Based on neuroanatomical and neuroimaging evidence, we hypothesize that the noradrenergic (NA) arousal system…
Authors not listed
Spatially correlated multi-level photoluminescence intermittency (blinking) of single organometal halide perovskite microcrystals have engendered considerable intrigue as it implies extremely long-range (> µm) communication amongst photo-generated charge carriers. While it is essential to consider the involvement of…
Linda Ǫ. Yu, Avinash Rao Vaidya, Aigerim (Aya) Akhmetzhanova, Sienna Bruinsma + 1 more
The neural grid code has been proposed to provide a mechanism for generalization and transfer of relational knowledge between situations enabling rapid adaptation of behavior in novel circumstances. However, to date, very little is known about the dynamics with which grid representations change at context transitions…
Xiaoxue Li, Jieting Hou, Qizheng Zhao, Yiqi Jia + 5 more
Linear array detectors dominate fields like industrial inspection owing to their efficient push-broom scanning modes. However, Single-Pixel Imaging (SPI) remains constrained by global 2D modulation, where the requisite pattern count scales quadratically with resolution. This imposes severe bottlenecks on data…
Geyu Weng, Kelsey Clark, Behrad Noudoost, Neda Nategh
Whether and how various visual sensory areas contribute to the perceived location of visual stimuli remains unknown. To test the role of neurons in extrastriate area V4 in generating alterations in spatial perception during saccadic eye movements (saccades), we examined perisaccadic mislocalization—the perceptual…
Authors not listed
The stability and performance of halide perovskite photovoltaic devices are critically limited by progressive defect generation and associated local non-radiative losses during operation. Self-healing of defects provides a promising pathway to prolong device functionality, yet the underlying microscopic mechanisms…
Authors not listed
This paper formally defines an operational isomorphism between spectral damping in molecular vibronic systems and neuromodulatory control in biological sensory systems. Without asserting causal continuity or physical identity across scales, we show that both domains instantiate the same class of output-selective…
Aaron Osgood-Zimmerman, Micha Sam Brickman Raredon
Tissues are shaped by extracellular signaling fields which convey information between cells. The cellular composition of tissues, and the extracellular signaling within the tissue, are innately spatially structured. Modern spatialomics data provide unprecedented measurement of ligand and receptor expressivity in situ…
Authors not listed
All-inorganic halide perovskites, especially CsPbBr3 microcrystals, are often considered to be optically stable and less defect-prone compared to their organometallic counterparts. Nevertheless, reports of photoluminescence (PL) blinking in bulk perovskite systems till date are restricted to organometallic halide…
Yaqi Li, Shuohan Zhang, Xiaohu You, Jiamin Li
With the increasing demand for ultra-reliable and low-latency communication (URLLC), spatiotemporal two-dimensional (2-D) channel coding has received growing interest. By leveraging the spatial degrees of freedom in massive multiple-input multiple-output (MIMO) systems, it shortens the time-domain blocklength, thereby…
Qi Wu, Zixian Wei, Xiaoying Zhang, Haiqiang Wei + 7 more
The integration of fixed and mobile optical access networks can enhance resource utilization, reduce network complexity, and lower deployment costs. Here, we report a field trial demonstrating the integration of hardware-efficient coherent optical transmission and high-fidelity analog waveform delivery over a single…
Authors not listed
In the United States, people of color are disproportionately and unjustly exposed to air pollution. Historically, environmental policy has emphasized aggregate emission reductions; yet major emission reduction scenarios do not sufficiently mitigate relative exposure disparities. Here, we show that without focusing on…
Mohamed A. Abdel-Moneim, Khalil F. Ramadan, El-Sayed M. El-Rabaie, Fathi E. Abd El-Samie + 1 more
Underwater acoustic (UWA) communication systems operate in severe channel impairments, including strong multipath propagation, long delay spreads, frequency selectivity, Doppler effects, and high ambient noise. These challenges significantly complicate automatic modulation classification (AMC), especially in dense…
Rundong Fan, Yamin Zheng, Pei Li, Xixiao Cao + 3 more
Optical fibres are the primary medium for optical signal transmission, and their guided modes provide a high-dimensional basis for modal-domain information encoding. However, conventional demultiplexing approaches typically convert fibre modes into fundamental Gaussian modes and require repeated mode conversions, while…
Mengyu Qian, Xidong Mu, Li You, Michail Matthaiou
A modular continuous aperture array (CAPA)-based multi-user communication system is investigated, where only a portion of the aperture, namely sub-CAPAs, is activated to serve users. The signal model for the proposed modular CAPA is first introduced. Based on this model, a spectral efficiency (SE) maximization problem…