CMA Misconvergence in Coherent Optical Communication for Signals Generated from a Single PRBS
Paper in proceedings, 2011

In the experimental study of modulators for coherent optical communications, it is common to generate multilevel signals using a single pseudo-random binary sequence. This simple experimental realization leads to symbol correlation. When modulators are studied in combination with adaptive receiver algorithms that rely on independent data, misconvergence may result. In this contribution, we investigate the impact of such correlation on a standard blind equalization method and provide guidelines to avoid misconvergence. Our results indicate that care needs to be taken when using a single PRBS sequence and that decorrelation delays must be chosen appropriately. We present simulation and theoretical results for 16-QAM, and show how our results can be applied to other multi-level constellations.

correlation

blind equalization

Coherent optical communication

PRBS

Author

Johnny Karout

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Henk Wymeersch

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Ahmet Serdar Tan

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Pontus Johannisson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Erik Agrell

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Martin E Sjödin

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Magnus Karlsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Peter Andrekson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Wireless & optical communications conference, New Jersey, 15-16 April 2011

5872279

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/WOCC.2011.5872279

ISBN

978-145770454-3

More information

Latest update

3/29/2018