22 papers · ranked by Valyu relevance
Daniel Bush, Neil Burgess
The encoding of information in spike phase relative to local field potential (LFP) oscillations offers several theoretical advantages over equivalent firing rate codes. One notable example is provided by place and grid cells in the rodent hippocampal formation, which exhibit phase precession-firing at progressively…
Pavithraa Seenivasan, Rishikesh Narayanan
Hippocampal place cells encode space through phase precession, whereby neuronal spike phase progressively advances during place-field traversals. What neural constraints are essential for achieving efficient transfer of information through such phase codes, while concomitantly maintaining signature neuronal…
Pavithraa Seenivasan, Rishikesh Narayanan
Neural codes have been postulated to build efficient representations of the external world. The hippocampus, an encoding system, employs neuronal firing rates and spike phases to encode external space. Although the biophysical origin of such codes is at a single neuronal level, the role of neural components in…
Guang Yang
—As AI technology continues to advance, voice cloning is becoming increasingly easy. Recently, cases of fraud involving audio forgery using AI technology have emerged, making it particularly important to covertly embed information and verify the authenticity and integrity of audio. Digital Audio Watermarking has thus…
Angus Chadwick, Mark C. W. van Rossum, Matthew F. Nolan
Populations of hippocampal place cells encode an animal’s past, current and future location through sequences of action potentials generated within each cycle of the network theta rhythm. These sequential representations have been suggested to result from temporally coordinated synaptic interactions within and between…
Tianhao Chu, Yuling Wu, Wentao Qiu, Zihao Jiang + 3 more
Localized space coding and phase coding are two distinct strategies responsible, respectively, for representing abstract structure and sensory observations in neural cognitive maps. In spatial representation, localized space coding is implemented by place cells in the hippocampus (HPC), while phase coding is…
Ramtin Pedarsani, Dong Yin, Kangwook Lee, Kannan Ramchandran
—We consider the problem of recovering a complex signal x ∈ C n from m intensity measurements of the form |a H i x|, 1 ≤ i ≤ m, where a H i is the i-th row of measurement matrix A ∈ C m×n . Our main focus is on the case where the measurement vectors are unconstrained, and where x is exactly K-sparse, or the so-called…
Xingyang Qi, Canlin Zhou, Yixiao Wang, Shuchun Si + 1 more
The stair-phase-coding patterns have been widely used to determine the fringe order for phase unwrapping of the wrapped phase in 3D (three-dimensional) shape measurement. Although the special coding sequence algorithm can achieve with a large number of codewords, it needs current codeword and its adjacent codewords to…
Lei Zhang
—This paper presents a novel approach for signal reconstruction using Spiking Neural Networks (SNN) based on the principles of Cognitive Informatics and Cognitive Computing. The proposed SNN leverages the Discrete Fourier Transform (DFT) to represent and reconstruct arbitrary time series signals. By employing N spiking…
Ali Momeni, Kasra Rouhi, Hamid Rajabalipanah, Ali Abdolali
Inspired by the information theory, a new concept of re-programmable encrypted graphene-based coding metasurfaces was investigated at terahertz frequencies. A channel-coding function was proposed to convolutionally record an arbitrary information message onto unrecognizable but recoverable parity beams generated by a…
HaDi MaBouDi, Krishna Subramani, Hamid Soltanian-Zadeh, Shun-ichi Amari + 1 more
Natural scenes contain higher-order statistical structures that can be encoded in their spatial phase information. Nevertheless, little progress has been made in modeling phase information of images, and understanding efficient representation of the image phases in the brain. In order to capture spatial phase structure…
Shuo Liu, Tie Jun Cui, Lei Zhang, Quan Xu + 9 more
'Jian Qiang Gu' 'Wen Xuan Tang' 'Mei Qing Qi' 'Jia Guang Han' 'Wei Li Zhang' 'Xiao Yang Zhou' 'Qiang Cheng'] The concept of coding metasurface makes a link between physically metamaterial particles and digital codes, and hence it is possible to perform digital signal processing on the coding metasurface to realize…
Byeongho Jo, Seungkwon Beack, Tae‐Jin Lee
Over the past decade, audio coding technology has seen standardization and the development of many frameworks incorporated with linear predictive coding (LPC). As LPC reduces information in the frequency domain, LP-based frequencydomain noise-shaping (FDNS) was previously proposed. To code transient signals…
Nitin Jain, Adrish Banerjee
—Run length limited (RLL) codes are used in visible light communication (VLC) to avoid flicker and to support different dimming ranges such that communication is not affected by the variation in light intensity. In this paper, we propose a low complexity split phase code as RLL code in serial concatenation with the…
S. Chitra, N. Kumaratharan, Haipeng Peng
Multi-carrier code division multiple access (MC-CDMA) technique is one of the strong candidates for next generation wireless mobile communication systems. Multi-carrier systems are very much sensitive to carrier frequency offset (CFO) results in intercarrier interference (ICI). To mitigate ICI without any spectral…
Authors not listed
Tandem mass spectrometry (MS/MS) fragmentation is conventionally understood as stochastic bond cleavage determined by thermochemical bond strengths and collision energies. We demonstrate that fragmentation is a deterministic categorical state progression governed by phase-lock network topology, where fragment…
Andrew Harvie, John de Mello
The Open Polarimeter (“Opol”) is a phase-based, high-resolution laser polarimeter formed from a small number of inexpensive optomechanical parts. The complete instrument can be assembled from scratch in two days for less than US$250, using only a 3D-printer and a benchtop milling machine. However despite its low cost…
Authors not listed
Molecular systems capable of directing the flow of excitons are key to the development and optimization of optoelectronic materials. The transport of excitons across multiple molecules is governed by the intermolecular electronic coupling network. In this manuscript, we consider the effects of complex-valued…
Authors not listed
This report compares various simulation and data analysis methods for free induction decay (FID) signals in Nuclear Magnetic Resonance (NMR) Spectroscopy. The methods discussed include discrete fast Fourier transformation (FFT), least squares fitting (LSF), short-time Fourier transformation (STFT), and wavelet…
David M. Benton, You Yang
Concurrent coding is an encoding scheme with ‘holographic’ type properties that are shown here to be robust against a significant amount of noise and signal loss. This single encoding scheme is able to correct for random errors and burst errors simultaneously, but does not rely on cyclic codes. A simple and practical…
Emma Wolpert, Kim Jelfs
How molecules pack has vital ramifications for their applications as functional molecular materials. Small changes in a molecule’s functionality can lead to large, non-intuitive, changes in their global solid-state packing, resulting in difficulty in targeted design. Predicting the crystal structure of organic…
suraj Manikandan, Jens Andreasen
This preprint has been retracted at the authors' request because of recently discovered fundamental errors and misrepresentation in the underlying data.This communication introduces a Ka-band phase shifter that leverages a blend of the donor polymer PM6 and non-fullerene acceptor (NFA) Y7 organic materials. The design…