概括
一种新型的功率域分层三角信号调制 (PDL-DSM) 方案通过减少模式交响来改善轨道角动量模式分割多重复合 (OAM-MDM) 系统. 这种方法提高了信号噪声比 (SNR) 以获得更好的传输性能.
科学领域:
- 光学通信是指光学通信的应用.
- 信号处理 信号处理
背景情况:
- 轨道角动量 (OAM) 模式划分复杂化 (MDM) 系统面临模式交叉的挑战,需要更高的信号噪声比 (SNR) 来提高性能.
- 现有的方法很难有效地减轻交叉通话,并在OAM-MDM系统中增强SNR.
研究的目的:
- 为OAM-MDM系统提出和实验验证一种新的功率域层级三角信号调制 (PDL-DSM) 方案.
- 通过有效管理量子化噪声和优化功率域复杂化来提高传输效率和SNR.
主要方法:
- 一个高阶信号被分解成两个低阶信号.
- 两个并行的三角形-西格玛调制器 (DSM) 用于量子化.
- 功率域复杂化用于优化传输效率.
主要成果:
- 该PDL-DSM方案成功传输了65,536个具有比特错误率 (BER) 的QAM信号,低于硬决策前置错误校正 (HD-FEC) 值.
- 实验结果表明,与OAM模式中的多阶段噪声塑造 (MASH) 和2位DSM方案相比,性能优越.
- 与传统的2位DSM方案相比,对于恢复的波形观察到15dB的显著SNR增益.
结论:
- PDL-DSM方案为OAM-MDM系统的SNR和传输性能提供了显著的改善.
- 这种新的方法有效地解决了模式交叉通话和量子化噪声的问题.
- PDL-DSM方案代表了高容量光通信系统的有希望的进步.
相关概念视频
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A balanced wye-to-delta circuit comprises balanced Y-connected voltage sources and delta-connected loads with no neutral line connection.
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The initial step in analyzing a wye-to-delta circuit is to assume a positive phase sequence. These phase voltages are then utilized to calculate the line voltages that occur directly across the delta-connected load impedances. Van, Vbn, and Vcn are the phase voltages in wye, and Vab, Vbc, and Vca are the line voltages for a delta circuit. The relation between...
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