title: Modified constant modulus algorithm for polarization-switched QPSK.
abstract: By using a generalized cost function, a modified constant modulus algorithm (CMA) that allows polarization demultiplexing and equalization of polarization-switched QPSK is found. An implementation that allows easy switching between the conventional and the modified CMA is described. Using numerical simulations, the suggested algorithm is shown to have similar performance for polarization-switched QPSK as CMA has for polarization-multiplexed QPSK.
authors.affiliation: Photonics Laboratory, Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
authors.forename: Pontus
authors.initials: P
authors.lastname: Johannisson
authors.forename: Martin
authors.initials: M
authors.lastname: Sjödin
authors.forename: Magnus
authors.initials: M
authors.lastname: Karlsson
authors.forename: Henk
authors.initials: H
authors.lastname: Wymeersch
authors.forename: Erik
authors.initials: E
authors.lastname: Agrell
authors.forename: Peter A
authors.initials: PA
authors.lastname: Andrekson