MUMBAI, India, Oct. 12 -- Intellectual Property India has published a patent application (202611104591 A) filed by Noida Institute Of Engineering And Technology Niet on August 31, 2026, for Adaptive Multi-Stage Receiver With Distortion-Aware Equalizer For Phase Noise Suppression In Coherent Optical Systems.
Inventors include Nitu Rao; and Dr. Prachi Tripathi.
The application for the patent was published on October 09, 2026, under issue no. 41/2026.
Abstract: ABSTRACT TITLE: ADAPTIVE MULTI-STAGE RECEIVER WITH DISTORTION-AWARE EQUALIZER FOR PHASE NOISE SUPPRESSION IN COHERENT OPTICAL SYSTEMS An adaptive multi-stage digital signal processing receiver system (100) for suppressing equalization-induced phase distortions in coherent optical receivers. The system (100) comprises a coherent optical front-end module (110), a static chromatic dispersion compensation module (120), a phase distortion detection and classification module (130) having a sliding-window monitor (132), distortion classifier (134), and burst event detector (136). An adaptive multi-order phase compensation module (140) applies frequency-bin-resolved corrections at a dynamically selected polynomial order. A distortion-aware adaptive butterfly equalizer module (150) modulates adaptation step sizes based on burst event status. A carrier and timing recovery module (160) incorporates a feed-forward timing correction path (168) using classifier-derived polynomial coefficients. The system achieves power-efficient real-time suppression by activating higher-order compensation only during detected burst events while maintaining low-order operation during quiescent periods. [Figure 1]
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