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基于低分辨率DAC的预等分系统的通道响应感知型三极形模拟器设计
Optics letters
|November 4, 2025
概括
我们开发了一种通道响应感知型三角形信号调制器 (CRA-DSM),可以提高数字对模拟转换器预等级的信号噪声比. 这种自适应技术可以在没有额外的硬件的情况下增强带宽有限的移动前程系统.
科学领域:
- 电气工程 电气工程
- 信号处理 信号处理
- 电信 电信服务 电信服务 电信服务
背景情况:
- 数字对模拟转换器 (DAC) 中的预等分系统对于提高信号质量至关重要.
- 传统的三角信号调制器 (DSM) 缺乏适应道特征的适应性.
- 带宽有限的移动前程系统需要高效的信号处理解决方案.
研究的目的:
- 提出和演示一种新的通道响应意识的三角形信号调制器 (CRA-DSM).
- 为了优化CRA-DSM,使用基因算法进行低分辨率DAC预等级.
- 通过适应性塑造噪声以匹配频道响应来增强信号噪声比 (SNR).
主要方法:
- 开发了一种优化CRA-DSM的遗传算法.
- 实现基于频道频率响应的适应性噪声塑造.
- 在不同的频道上实验性地传输了高速数据信号 (32 Gb/s 16-QAM DMT和15.2 Gb/s 16-QAM OFDM).
主要成果:
- CRA-DSM实现了适应式噪声分布,与频道频率响应相匹配.
- 证明了显著的SNR增益:在低通道中1.6dB,在5.5GHz带通道中1.2dB.
- 在两种实验场景中表现优于传统的DSM.
结论:
- 在没有额外的硬件复杂性的情况下,CRA-DSM有效地改善了SNR.
- 拟议的CRA-DSM是带宽有限的移动前航系统的实际解决方案.
- 遗传算法优化可以提高DSM在预等值应用中的性能.
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