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We adopt the frozen Gaussian approximation (FGA) for modeling seismic waves. The method belongs to the category of ray-based beam methods. It decomposes seismic wavefield into a set of Gaussian functions and propagates these Gaussian…

地球物理 · 物理学 2013-04-15 Xu Yang , Jianfeng Lu , Sergey Fomel

Using the methodology of conditional-probability density functional theory, and several mild assumptions, we calculate the temperature-dependence of the Perdew-Burke-Ernzerhof (PBE) generalized gradient approximation (GGA). This…

化学物理 · 物理学 2023-08-17 John Kozlowski , Dennis Perchak , Kieron Burke

In this paper, we study polar codes from a practical point of view. In particular, we study concatenated polar codes and rate-compatible polar codes. First, we propose a concatenation scheme including polar codes and Low-Density…

信息论 · 计算机科学 2011-07-28 Ali Eslami , Hossein Pishro-Nik

It is well known that to fulfill their full potential, the design of polar codes must be tailored to their intended decoding algorithm. While for successive cancellation (SC) decoding, information theoretically optimal constructions are…

信息论 · 计算机科学 2022-12-01 Marvin Geiselhart , Andreas Zunker , Ahmed Elkelesh , Jannis Clausius , Stephan ten Brink

A method for construction of polar subcodes is presented, which aims on minimization of the number of low-weight codewords in the obtained codes, as well as on improved performance under list or sequential decoding. Simulation results are…

信息论 · 计算机科学 2017-05-04 Peter Trifonov , Grigorii Trofimiuk

This paper presents a Gaussian process (GP) model for estimating piecewise continuous regression functions. In scientific and engineering applications of regression analysis, the underlying regression functions are piecewise continuous in…

统计方法学 · 统计学 2021-04-15 Chiwoo Park

A modification to 5G New Radio (NR) polar code is proposed, which improves the error correction performance with higher order modulation through probabilistic shaping. The presented scheme mainly re-uses existing hardware at the…

信息论 · 计算机科学 2018-08-29 Onurcan İşcan , Wen Xu

Product codes are widespread in optical communications, thanks to their high throughput and good error-correction performance. Systematic polar codes have been recently considered as component codes for product codes. In this paper, we…

信息论 · 计算机科学 2019-01-23 Valerio Bioglio , Carlo Condo , Ingmar Land

This paper proposes the architecture of partial sum generator for constituent codes based polar code decoder. Constituent codes based polar code decoder has the advantage of low latency. However, no purposefully designed partial sum…

硬件体系结构 · 计算机科学 2017-03-08 Tiben Che , Gwan Choi

Systematic polar codes are shown to outperform non-systematic polar codes in terms of the bit-error-rate (BER) performance. However theoretically the mechanism behind the better performance of systematic polar codes is not yet clear. In…

信息论 · 计算机科学 2015-04-17 Liping Li , Wenyi Zhang , Yanjun Hu

Similar to existing codes, puncturing and shortening are two general ways to obtain an arbitrary code length and code rate for polar codes. When some of the coded bits are punctured or shortened, it is equivalent to a situation in which the…

信息论 · 计算机科学 2019-10-23 Wei Song , Yifei Shen , Liping Li , Kai Niu , Chuan Zhang

We propose a new family of polar coding which realizes high coding gain, low complexity, and high throughput by introducing a protograph-based design. The proposed technique called as quasi-cyclic (QC) polar codes can be highly parallelized…

信息论 · 计算机科学 2021-02-26 Toshiaki Koike-Akino , Ye Wang

The article presents a new approach to euclidean plane geometry based on projective geometric algebra (PGA). It is designed for anyone with an interest in plane geometry, or who wishes to familiarize themselves with PGA. After a brief…

综合数学 · 数学 2016-11-01 Charles G. Gunn

This paper proposes a polar code construction scheme that reduces constituent-code supplemented decoding latency. Constituent codes are the sub-codewords with specific patterns. They are used to accelerate the successive cancellation…

信息论 · 计算机科学 2017-09-22 Tiben Che , Gwan Choi

The construction of polar codes for channels other than BECs requires sorting of all bit channels and then selecting the best $K$ of them for a block length $N=2^n$. In this paper, two types of partial orders (PO) of polar codes are…

信息论 · 计算机科学 2017-04-25 Wei Wang , Liping Li

Polar codes are a new family of error correction codes for which efficient hardware architectures have to be defined for the encoder and the decoder. Polar codes are decoded using the successive cancellation decoding algorithm that includes…

硬件体系结构 · 计算机科学 2015-01-12 Guillaume Berhault , Camille Leroux , Christophe Jego , Dominique Dallet

Obtaining a reduced description with particle and momentum flux densities outgoing from the microscopic equations of motion of the particles requires approximations. The usual method, we refer to as truncation method, is to zero Fourier…

统计力学 · 物理学 2017-01-04 Hamid Seyed-Allaei , Lutz Schimansky-Geier , Mohammad Reza Ejtehadi

In this work, we investigate the performance of polar codes with the assistance of feedback in communication systems. Although it is well known that feedback does not improve the capacity of memoryless channels, we show that the finite…

信息论 · 计算机科学 2026-04-13 Ling Liu , Qi Cao , Liping Li , Baoming Bai

Friedlander, Mac\^{e}do, and Pong recently introduced the projected polar proximal point algorithm (P4A) for solving optimization problems by using the closed perspective transforms of convex objectives. We analyse a generalization (GP4A)…

最优化与控制 · 数学 2022-01-25 Scott B. Lindstrom

Polar codes with Reed-Solomon (RS) kernel have great potential in next-generation communication systems due to their high polarization rate. In this paper, we study the polarization characteristics of RS polar codes and propose two types of…

信息论 · 计算机科学 2023-08-11 Jianhan Zhao , Wei Zhang , Yanyan Liu