The recently developed digital coherent receiver enables us to employ a variety of spectrally
efficient modulation formats such as-ary phase-shift keying and quadrature-amplitude …

Free-space optical (FSO) communication technologies constitute a solution to cope with the
bandwidth demand of future satellite-ground networks. They may overcome the RF …

Coherent optical transmission systems have a four-dimensional (4–D) signal space (two
quadratures in two polarizations). These four dimensions can be used to create modulation …

The capacity and geographical coverage of the global communications network continue to
expand. One consequence of this expansion is a steady growth in the overall energy …

We explore the potential benefits of digital nonlinearity compensation (NLC) techniques in
fully loaded coherent wavelength-division multiplexed (WDM) transmission systems. After …

This paper reviews the performance of optimized modulation formats in two, four, and eight
dimensions. We present performance (lower bounds) for higher dimensions by exploiting …

A wristwatch-based wireless sensor platform for IoT wearable health monitoring applications
is presented. The paper describes the platform in detail, with a particular focus given to the …

Shaping modulation formats in multi-dimensional (MD) space is an effective approach to
harvest spectral efficiency gains in both the additive white Gaussian noise (AWGN) channel …

This tutorial discusses the design and ASIC implementation of coherent optical transceivers.
Algorithmic and architectural options and tradeoffs between performance and …

In this paper, we examine the performance of several modulation formats in more than four
dimensions for coherent optical communications systems. We compare two high …