在256Gb/s PAM4 IM/DD系统中进行部分响应均等的无乘法错误校正器
Optics letters
|February 14, 2025
概括
一个新的无乘数错误校正器 (MF-EC) 解决了高速光学系统在部分响应等分 (PRE) 中的错误传播问题. 这种技术显著减少了爆发错误,提高了数据传输的可靠性.
科学领域:
- 光学通信系统 光学通信系统
- 信号处理 信号处理
- 数字通讯数字通讯数字通讯
背景情况:
- 由于带宽限制,高速强度调制和直接检测 (IM/DD) 系统面临符号间干扰 (ISI).
- 部分响应等效 (PRE) 提高了稳定性,但其常见的1/(1+D) 解码器可能会导致错误传播,降低性能.
研究的目的:
- 提出一种新型的无乘数错误校正器 (MF-EC),旨在抑制二级PRE系统中的错误传播.
- 通过实验验证MF-EC在高速光通信中的有效性.
主要方法:
- 开发一种无乘数的错误校正器 (MF-EC),仅使用增量操作来定位和纠正爆破错误.
- 在256Gb/s的4次脉冲振幅调制 (PAM-4) IM/DD系统中,MF-EC的实验演示.
主要成果:
- MF-EC有效地消除了1/(1+D) 解码器的错误传播,将最大爆破错误长度从15个符号减少到7个符号.
- 与基于预编码和错误相关的DFE (EC-DEF) 相比,拟议的MF-EC表现出更高的性能.
- 在500米传输场景中,MF-EC在KP4-FEC值下实现了与PRE-MLSE可比的性能,并降低了复杂度.
结论:
- 无乘法错误校正器是缓解PRE系统错误传播的可行解决方案.
- MF-EC为提高高速光通信系统的可靠性和效率提供了一个有希望的方法.
- 拟议的方法为先进光学收发器的现有技术提供了一个复杂性高效的替代方案.
相关概念视频
Long-patch Base Excision Repair
7.0K
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
7.0K
NMR Spectrometers: Resolution and Error Correction
650
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
650
Mismatch Repair
4.7K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
4.7K
Second Order systems II
84
In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.
84
Double Resonance Techniques: Overview
183
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...
183
Time-Domain Interpretation of PD Control
79
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
Consider the example of control of motor torque. Initially, a positive...
79


