Digital coherent transceivers have revolutionized optical fiber communications due to their
superior performance offered compared to intensity modulation and direct detection based …

Optical frequency combs can potentially provide an efficient light source for multi-terabit-per-
second optical superchannels. However, as the bandwidth of these multi-wavelength light …

OSNR monitoring is indispensable for coherent systems to ensure robust, reliable network
operation and potentially enable impairment-aware routing for future dynamic optical …

Advanced DSP Techniques Enabling High Spectral Efficiency and Flexible Transmissions:
Toward elastic optical networks Page 1 IEEE SIGNAL PROCESSING MAGAZINE [82] MARCh …

Three novel linewidth-tolerant, low-complexity, two-stage feed-forward carrier phase
estimation algorithms are introduced for dual-polarization 16-ary quadrature amplitude …

Phase-retrieval (PR) receivers can reconstruct complex-valued signals from two de-
correlated intensity measurements by the use of iterative PR algorithm, without the …

In long haul optical fiber communication networks, whichcan span thousands of kilometers,
bandwidth is at a premium due to the relatively low availability of optical fibers when …

Modulation format independence is one of the key challenges in digital signal processing
(DSP) techniques for future elastic optical transmissions. We proposed a modulation-format …

To improve the transmission capacity of an optical system, different multiplexing schemes
have been proposed, such as optical time division multiplexing (OTDM), wavelength division …

Multi-format and linewidth-tolerant carrier phase estimation (CPE) is a vital part of digital
signal processing (DSP) units for future elastic optical transmissions to relax the laser …