Adaptive Volterra compensation for interference of two high-order modulation carriers over satellite

Author

Beidas, Bassel F. ; Seshadri, Rohit Iyer

fYear

2009

fDate

18-21 Oct. 2009

Firstpage

1

Lastpage

7

Abstract

We introduce complete analytical characterization of the nonlinear interference that results when passing more than one high-order modulation carrier through the same nonlinear transponder HPA. Based on this analysis, a novel Volterra filter is proposed that models nonlinear intersymbol interference (ISI) and adjacent channel interference (ACI). Our focus is on adaptive algorithms so that the solutions are completely blind to unknown transponder HPA characteristics, and can rapidly respond to varying operating back-off level. Furthermore, two families of adaptive solutions are proposed to compensate for the nonlinear ISI and ACI. The effectiveness of the proposed techniques is demonstrated via extensive simulations for high-order QAM and APSK modulation schemes.

Keywords

interference suppression; nonlinear filters; quadrature amplitude modulation; APSK modulation schemes; QAM modulation schemes; Volterra filter; adaptive Volterra compensation; adjacent channel interference; high-order modulation carriers; nonlinear intersymbol interference; nonlinear transponder HPA; Adaptive algorithm; Bandwidth; Equalizers; Filter bank; Gaussian noise; Interchannel interference; Interference cancellation; Intersymbol interference; Satellites; Transponders;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 2009. MILCOM 2009. IEEE

Conference_Location

Boston, MA

Print_ISBN

978-1-4244-5238-5

Electronic_ISBN

978-1-4244-5239-2

Type

conf

DOI

10.1109/MILCOM.2009.5379816

Filename

5379816