双相全球合低密度平价检查解码有助于提前终止和强迫融合
1School of Electronic Engineering and Intelligent Manufacturing, Anqing Normal University, Anqing 246003, China.
Sensors (Basel, Switzerland)
|November 9, 2024
概括
全球合 (GC) LDPC代码通过早期终止 (ET) 和强迫融合 (FC) 实现更快的解码. 这些技术显著降低了复杂性并提高了性能,特别是在较低的信号噪声比率下.
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:
- 全球合 (GC) 低密度平价检查 (LDPC) 代码对于高效的数据传输至关重要.
- 传统的解码算法可能是计算密集型,限制了效率.
- 在不影响错误纠正的情况下提高解码速度是一个关键的挑战.
研究的目的:
- 为了提高GC LDPC代码的解码效率.
- 将提前终止 (ET) 和强迫融合 (FC) 引入到两相解码算法中.
- 分析拟议方法的性能和复杂性权衡.
主要方法:
- 实现了集成ET和FC技术的双相解码算法.
- 开发了两种用于本地解码的ET变体:ET-1 (预测终止) 和ET-2 (代再分配).
- 对GC LDPC代码的联合ET-FC方法进行了评估.
主要成果:
- ET-1显著降低了解码时间复杂性 (高达42%),没有性能损失.
- ET-2保持了解码时间复杂性,同时提高了比特错误率 (BER) 和错误率 (FER).
- ET-2-FC组合提供了25%的复杂性节省,改善了BER (0.18dB) 和FER (0.23dB).
结论:
- 提前终止 (ET) 和强迫融合 (FC) 是有效的加速GC LDPC代码解码.
- ET-1提供了显著的复杂性增长,而ET-2提供了性能改进.
- 拟议的ET-FC策略提高了GC LDPC代码在通信系统中的实际适用性.
相关概念视频
Block Diagram Reduction
159
The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
159
Statically Indeterminate Problem Solving
365
Statically indeterminate problems are those where statics alone can not determine the internal forces or reactions. Consider a structure comprising two cylindrical rods made of steel and brass. These rods are joined at point B and restrained by rigid supports at points A and C. Now, the reactions at points A and C and the deflection at point B are to be determined. This rod structure is classified as statically indeterminate as the structure has more supports than are necessary for maintaining...
365
Routh-Hurwitz Criterion II
192
In the application of the Routh-Hurwitz criterion, two specific scenarios can arise that complicate stability analysis.
The first scenario occurs when a singular zero appears in the first column of the Routh table. This situation creates a division by zero issues. To resolve this, a small positive or negative number, denoted as epsilon (∈), is substituted for the zero. The stability analysis proceeds by assuming a sign for ∈. If ∈ is positive, any sign change in the first...
The first scenario occurs when a singular zero appears in the first column of the Routh table. This situation creates a division by zero issues. To resolve this, a small positive or negative number, denoted as epsilon (∈), is substituted for the zero. The stability analysis proceeds by assuming a sign for ∈. If ∈ is positive, any sign change in the first...
192
Constraints and Statical Determinacy
580
In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
580
Double Resonance Techniques: Overview
191
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin decoupling is usually achieved by...
191
Power System Three-Phase Short Circuits
77
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
77


