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1. (WO2018064812) SYSTEM AND METHOD FOR PILOT DATA DETECTION USING CORRELATION PEAK TRACKING

Pub. No.:    WO/2018/064812    International Application No.:    PCT/CN2016/101499
Publication Date: Fri Apr 13 01:59:59 CEST 2018 International Filing Date: Sun Oct 09 01:59:59 CEST 2016
IPC: H04J 11/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
Inventors: JIANG, Zhiping
KE, Jianhong
JIN, Dajiang
Title: SYSTEM AND METHOD FOR PILOT DATA DETECTION USING CORRELATION PEAK TRACKING
Abstract:
During optical performance monitoring in low SNR conditions, the detection of pilot data may be more difficult because the detector may mistake noise for the pilot data signal. Systems and methods are disclosed herein that try to address this problem. In one embodiment, a pilot tone detector processes the received signal to determine a maximum correlation peak, and then performs tracking of the correlation peak over time. Unlike the pilot data signal, noise is typically more transient in nature. Therefore, if a correlation peak does not actually correspond to the pilot data signal, but instead corresponds to noise, then the correlation peak typically disappears over time when tracked. A search for a new correlation peak may then be performed. When a correlation peak is determined that actually corresponds to the pilot data signal, then the correlation peak typically remains when tracked.