20 papers · ranked by Valyu relevance
Dr Mike Gilbert, Dr Anders Rasmussen
In the cerebellum, below a scale threshold, cells seem to select their targets at random and receive contact from a random sample of cells that innervate their location. The largest source of glutamatergic input to the cerebellum is from mossy fibres, which terminate on granule cells in the inner layer of the…
Eran Stark, Hadas E. Sloin
1## RATE AND PHASE CODES FOR SPATIAL REPRESENTATION Neurons are thought to represent information by spikes, but which specific aspect of spiking activity represents information is debated. Place coding in the mammalian hippocampus provides a useful system for studying forms of neuronal coding. Individual pyramidal…
Huanqiu Zhang, Israel Nelken, Tatyana Sharpee
Deciphering the neural code requires identifying its fundamental symbols or code-words. Neural activity is usually interpreted either as a rate code – based on average spike counts – or as a temporal code, which distinguishes patterns with identical counts. Yet, the symbols of the code remain undefined. Here we show…
Ahmed Hareedy, Beyza Dabak, Robert Calderbank
Constrained codes are used to prevent errors from occurring in various data storage and data transmission systems. They can help in increasing the storage density of magnetic storage devices, in managing the lifetime of electronic storage devices, and in increasing the reliability of data transmission over wires. Over…
Paridhi Latawa, Nuh Aydın
| 1 | Abstract | | 2 | | --- | --- | --- | --- | | 2 | | Introduction | 2 | | 3 | | Convolutional Codes | 3 | | | 3.1 | Encoding of Binary Convolutional Codes | 3 | | | 3.2 | Decoding Convolutional Codes | 11 | | | 3.3 | Truncated Viterbi Decoding | 13 | | 4 | | DNA Codes | 17 | | | 4.1 | Constraints for the…
Andrew D. Cummins, David G. M. Mitchell, Erik Perrins, Jun Chen
Low-density parity-check (LDPC) codes form part of the IRIG-106 standard and have been successfully deployed for the Telemetry Group version of shaped-offset quadrature phase shift keying (SOQPSK-TG) modulation. Recently, LDPC code solutions have been proposed and optimized for continuous phase modulations (CPMs)…
Fabian Brand, Christian Herglotz, André Kaup
©2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or…
A. V. Lebedev, Vladimir Lebedev, Nikita Polyanskii
—In this paper, we discuss two-stage encoding algorithms capable of correcting a fraction of asymmetric errors. Suppose that the encoder transmits n binary symbols (x1, . . . , xn) one-by-one over the Z-channel, in which a 1 is received only if a 1 is transmitted. At some designated moment, say n 1, the encoder uses…
Hexiang Huang, Qing Xiang
Consider an assignment of bits to the vertices of a connected graph Γ(V, E) with the property that the value of each vertex is a function of the values of its neighbors. A collection of such assignments is called a storage code of length |V | on Γ. In this paper we construct an infinite family of binary linear storage…
Ying Chen, Jianrong Bao, Yanhai Shang, Chao Liu + 5 more
To obtain efficient channel codes with high power efficiency at moderate signal-to-noise ratios (SNRs), an efficient high-rate protograph quasi-cyclic (QC) low-density parity-check (LDPC) codes is optimally constructed. By an optimized protograph template, the code framework is firstly produced by the extensions of the…
Zuo Tang, Jing Lei, Ying Huang, Jun Chen
This paper focuses on the Low-Density Algebra-Check (LDAC) code, a novel low-rate channel code derived from the Low-Density Parity-Check (LDPC) code with expanded algebra-check constraints. A method for optimizing LDAC code design using Extrinsic Information Transfer (EXIT) charts is presented. Firstly, an iterative…
Michael Rice, Syed A. Jafar
This paper presents a history of the development of channel codes in deep-space telemetry and aeronautical mobile telemetry. The history emphasizes “firsts” and other remarkable achievements. Because coding was used first in deep-space telemetry, the history begins with the codes used for Mariner and Pioneer. History…
Olivier Massicot, Giulia Cervia, Maël Le Treust
Empirical coordination offers a way to understand how agents can coordinate actions under communication constraints. This paper investigates the finite blocklength regime of this problem, where the encoder and decoder aim to produce a sequence of action pairs that is jointly typical with respect to a target…
Ricardo L. de Queiroz, Diogo C. Garcia, Yi‐Hsin Chen, Ruhan Conceição + 2 more
—We study the decision-making process for choosing video compression systems through a rate-distortion- complexity (RDC) analysis. We discuss the 2D Bjontegaard delta (BD) metric and formulate generalizations in an attempt to extend its notions to the 3D RDC volume. We follow that discussion with another one on the…
Jinkai Ren, Dan Song, Huihui Wu, Lin Wang + 3 more
'Jun Chen' 'Sadaf Salehkalaibar'] It is challenging to design an efficient lossy compression scheme for complicated sources based on block codes, especially to approach the theoretical distortion-rate limit. In this paper, a lossy compression scheme is proposed for Gaussian and Laplacian sources. In this scheme, a new…
Michael Yarus
Standard Genetic Code (SGC) evolution is quantitatively modeled in computed ‘worlds’ containing up to 2000 independent coding ‘environments’. Environments can host multiple codes that may fuse or divide, with division yielding identical descendants. Code division may be selected - sophisticated gene products could be…
Aliye Hazal Koyuncu, Jacopo Movilli, Sevil Sahin, Dmitrii V. Kriukov + 2 more
This work describes a competing activation network, which is regulated by chemical feedback at the liquid-surface interface. Feedback loops dynamically tune the concentration of chemical components in living systems, thereby controlling regulatory processes in neural, genetic, and metabolic networks. Advances in…
Authors not listed
This paper introduces simple phenomenological rate theory from the perspective of molecular interconversions and then applies it, in the form of Transition State Theory, to processes such as atomic diffusion and thermally-activated crystal growth in condensed matter composed of very large numbers of atoms or molecules.…
Rajeev Kohli
Genetic codes assign sixty-four codons to twenty amino acids. These assignments are known to follow certain rules. One question long considered but still unresolved is if these rules are derived from an underlying structure in genetic codes. Knowledge of such structure could facilitate better understanding of the…
Authors not listed
Two kinetic schemes of the general modifier mechanism have been analysed in a quasi-steady state approximation, assuming that the reaction product concentration is negligible (a natural assumption for the initial rate method) and without additional simplifying assumptions. The characteristic equations have been…