相关实验视频
Updated: May 31, 2025

08:35
An Operant Intra-/Extra-dimensional Set-shift Task for Mice
Published on: January 22, 2016
12.1K
一般化的适应多样性梯度下降比特翻转与有限状态机器
Jovan Milojković1, Srdjan Brkić2, Predrag Ivaniš1
1School of Electrical Engineering, University of Belgrade, 11000 Belgrade, Serbia.
Entropy (Basel, Switzerland)
|January 24, 2025
概括
我们开发了一种新的渐变下降位翻转算法与有限状态机器 (GDBF-wSM) 解码低密度平价检查 (LDPC) 代码,比现有方法提高性能.
科学领域:
- 信息理论 信息理论
- 编码理论编码理论
- 数字通信数字通信
背景情况:
- 低密度平价检查 (LDPC) 代码对于现代通信系统中可靠的数据传输至关重要.
- 代解码算法对于实现LDPC代码的接近容量性能至关重要.
- 现有的梯度下降位翻转算法可以进一步优化,以提高解码效率.
研究的目的:
- 用有限状态机器 (GDBF-wSM) 引入一种新的梯度下降位翻转算法,用于LDPC代码解码.
- 开发一个可学习的框架,使用错误模式数据库优化解码器参数.
- 在各种通道条件下评估拟议的GDBF-wSM算法的性能.
主要方法:
- 实现有限状态机器 (FSM) 在解码过程中动态调整可变节点更新值.
- 开发一个参数优化框架,利用一个无法纠正的错误模式数据库.
- 使用正规LDPC代码对二元对称通道 (BSC) 和添加白高斯噪声 (AWGN) 通道进行性能评估.
主要成果:
- 拟议的GDBF-wSM算法与现有的基于GDBF的方法相比,显示出更好的性能.
- 有限状态机器根据之前的翻转行为有效地适应节点更新.
- 可学习框架显示了进一步优化解码器参数的潜力.
结论:
- GDBF-wSM算法在LDPC代码的代解码中提供了一个有希望的进步.
- 有限状态机器的集成提高了解码适应性和性能.
- 拟议的可学习框架为系统解码器优化提供了一条途径.
更多相关视频
08:27Author Spotlight: Efficient Image Recognition Using Directional Gradient Histogram Technique and Support Vector Machines
Published on: January 5, 2024
957
00:10Single-Molecule Tracking Microscopy - A Tool for Determining the Diffusive States of Cytosolic Molecules
Published on: September 5, 2019
8.2K
相关概念视频
Genetic Drift
39.3K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
39.3K
Downsampling
126
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
126
Mutation, Gene Flow, and Genetic Drift
57.9K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
57.9K
Basic Discrete Time Signals
190
The unit step sequence is defined as 1 for zero and positive values of the integer n. This sequence can be graphically displayed using a set of eight sample points, showing a step function starting from n=0 and remaining constant thereafter.
The unit impulse or sample sequence is mathematically expressed as zero for all n values except at n=0, where it is one. The unit impulse sequence, denoted by δ(n), is the first difference of the unit step sequence, while the unit step sequence u(n) is...
The unit impulse or sample sequence is mathematically expressed as zero for all n values except at n=0, where it is one. The unit impulse sequence, denoted by δ(n), is the first difference of the unit step sequence, while the unit step sequence u(n) is...
190
Multimachine Stability
138
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
138