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MITIGATION OF MULTI-PATH INTERFERENCE FROM QUASI-SINGLE-MODE FIBER USING HYBRID SPAN CONFIGURATION AND DIGITAL SIGNAL PROCESSING
MITIGATION OF MULTI-PATH INTERFERENCE FROM QUASI-SINGLE-MODE FIBER USING HYBRID SPAN CONFIGURATION AND DIGITAL SIGNAL PROCESSING
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机译:利用混合跨度配置和数字信号处理减轻准单模光纤的多径干扰
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摘要
Aspects of the present disclosure are directed to the mitigation of multi-path interference from quasi-single-mode fiber using hybrid span configuration and digital signal processing wherein a hybrid span of quasi-single mode fibers and single-mode fibers are used to configure the hybrid span. Additional aspects are directed to introducing a low-baud rate sub-banding signal to reduce the number of DD-LMS taps required when compensating the multi-path interference as the low-baud rate signal requires fewer taps to cover a given range of MPI as compared to a high-baud rate signal. Finally further aspects are directed to an ALMS equalizer which further reduces the number of equalizer taps by shifting its center tap towards the right if higher-order modes transmit slower than a fundamental mode, otherwise the center tap is shifted to the left.
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