The estimation of laser linewidth or phase noise variance is of great significance for the
applications including coherent optical communications, optical fiber sensing, quantum …

This letter proposes two carrier frequency offset (CFO) estimators by utilizing the likelihood
ratio test (LRT) for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) …

Coherent free-space optical communication offers significant advantages in terms of
communication capacity, making it particularly suitable for high-speed inter-satellite …

In this paper, we propose a number-theoretic net-based particle filter (NT-PF) to dynamically
estimate the linear phase noise (LPN) for CO-OFDM systems in the time domain. Inspired by …

In this paper, we propose a novel approach for estimating in-phase/quadrature-phase (IQ)
mismatch at the transmitter using a number-theoretic net (NT-net)-based Gaussian particle …

For traditional particle filter track-before-detect (TBD) algorithms, when tracking targets,
these algorithms require inter frame accumulation of multiple frames to accurately achieve …

We propose a joint maximum likelihood (ML)/maximum a posteriori probability (MAP)
frequency offset (FO) and linear phase noise (LPN) estimation scheme for coherent optical …

In this paper, a polarization state estimation algorithm in coherent optical communication
systems is proposed based on the maximum likelihood (ML) method. Through the …