基于光谱分析的盲频偏移估计,用于具有可调滚动因子和各种调制格式的数字子载波复杂化系统
Optics express
|November 14, 2024
概括
一种新的盲目的频率偏移估计 (FOE) 方法准确地估计了数字子载波复杂化 (DSM) 信号中的频率偏移. 这种方法为各种调制方案和光谱塑造因子提供了更高的精度和计算效率.
科学领域:
- 信号处理 信号处理
- 电信工程 电信工程 电信工程
- 数字通信数字通信
背景情况:
- 数字子载波复合 (DSM) 系统对于高容量数据传输至关重要.
- 准确的频率偏移估计 (FOE) 对于维护DSM系统中信号完整性至关重要.
- 现有的FOE方法在各种调制方案和光谱成型中可能缺乏灵活性或效率.
研究的目的:
- 开发一个盲目的频率偏移估计 (FOE) 方法,用于数字子载波复杂化 (DSM) 信号.
- 为了提高DSM系统的FOE的准确性和计算效率.
- 确保拟议方法能够适应各种调制方案和光谱成型参数.
主要方法:
- 利用DSM信号中固有的光谱信息.
- 分析频率偏移 (FO) 与信号频谱总功率之间的相关性.
- 实施一种灵活的方法,以实现根升高的等位数 (RRC) 谱形状的滚动因子.
主要成果:
- 在FOE中达到高精度,误差小于30MHz,FFT大小为2048.8.
- 在各种调制方案和滚动因子中证明了有效性.
- 与现有的FOE技术相比,展示了较低的计算复杂性.
- 在一个连贯的检测系统中使用48Gbaud 16QAM DSM信号进行实验验证的性能.
结论:
- 拟议的盲FOE方法为DSM信号提供了准确,高效和灵活的解决方案.
- 这种技术对不同的调制方案和光谱造型参数具有强度.
- 在实际的DSM系统实现中,在计算复杂性方面提供了显著的优势.
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