We propose a novel frequency-domain adaptive equalizer in digital coherent optical
receivers, which can reduce computational complexity of the conventional time-domain …

We theoretically and experimentally investigate a time-domain digital pre-equalization
(DPEQ) scheme for bandwidth-limited optical coherent communication systems, which is …

We propose a novel method of compensation for imbalance between in-phase (I) and
quadrature (Q) channels in the front-end circuit of digital coherent optical receivers. Adaptive …

Digital coherent receivers have caused a revolution in the design of optical transmission
systems, due to the subsystems and algorithms embedded within such a receiver. After …

An all-digital timing recovery loop is employed in optical coherent receivers, which depends
on the number-controlled oscillator and the interpolator to complete timing adjustment in an …

We propose a novel configuration of the finite-impulse-response (FIR) filter adapted by the
phase-dependent decision-directed least-mean-square (DD-LMS) algorithm in digital …

Frequency-domain equalization supported by training-aided 2× 2 multi-input multi-output
channel estimation (CE) is proposed for coherent optical transmission systems. In particular …

Digital signal processing has completely changed the way optical communication systems
work during recent years. In combination with coherent demodulation, it enables …

Adaptive electronic equalizers using the constant modulus algorithm (CMA) algorithm often
converge to a singular coefficient matrix that produces the same signal at multiple outputs …

We analyze the clock-recovery process based on adaptive finite-impulse-response (FIR)
filtering in digital coherent optical receivers. When the clock frequency is synchronized …