Multidimensional Optimized Optical Modulation Formats
Kapitel i bok, 2016

This chapter overviews the relatively large body of work (experimental and theoretical) on modulation formats for optical coherent links. It first gives basic definitions and performance metrics for modulation formats that are common in the literature. Then, the chapter discusses optimization of modulation formats in coded systems. It distinguishes between three cases, depending on the type of decoder employed, which pose quite different requirements on the choice of modulation format. The three cases are soft-decision decoding, hard-decision decoding, and iterative decoding, which loosely correspond to weak, medium, and strong coding, respectively. The chapter also discusses the realizations of the transmitter and transmission link properties and the receiver algorithms, including DSP and decoding. It further explains how to simply determine the transmitted symbol from the received 4D vector, without resorting to a full search of the Euclidean distances to all points in the whole constellation.

coding

modulation

fiber optic communications

Författare

Magnus Karlsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Erik Agrell

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Enabling Technologies for High Spectral-efficiency Coherent Optical Communication Networks, Ch. 2

13-64

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

DOI

10.1002/9781119078289.ch2

ISBN

978-1-118-71476-8

Mer information

Senast uppdaterat

2018-03-29