Steady-state performance of the adaptive MLD receiver in dual-polarized 16-QAM systems with crosstalk

Author

Cartwright, K.V. ; Duvoisin, P.F. ; Hsieh, S.T. ; Williamson, E.P.

Author_Institution

Dept. of Electr. Eng., Tulane Univ., New Orleans, LA, USA

fYear

1989

fDate

9-12 Apr 1989

Firstpage

911

Abstract

The adaptive maximum-likelihood detector (MLD) is used to combat the deleterious effects of depolarization crosstalk in dual-channel M-QAM (quadrature-amplitude modulation) systems. The authors use a truncated union upper bound to calculate the probability of symbol error (P_es) for dual-channel 16-QAM. The frequency of occurrence of P_es versus crosstalk phase shift, with crosstalk level as a parameter, and a 3-D plot of P_es as a function of the two crosstalk phase shifts, is presented. Assuming uniform distributions for the phase shifts, the average probability of symbol error <P_es> is determined, and the performance of the MLD is compared to that of the diagonalizer canceller. It is shown that the MLD gains about 1.5 dB improvement in signal-to-noise ratio above that of the diagonalizer for crosstalk values above -10 dB, and that it actually uses the crosstalk to decrease the <P_es> below the zero crosstalk value for crosstalk levels less than -10 dB

Keywords

adaptive systems; amplitude modulation; crosstalk; digital radio systems; electromagnetic wave polarisation; error statistics; interference suppression; probability; radio receivers; radiocommunication; signal detection; adaptive MLD receiver; adaptive maximum-likelihood detector; crosstalk phase shift; depolarization crosstalk; digital radio systems; dual-polarized 16-QAM systems; probability; quadrature-amplitude modulation; radiocommunication; signal/noise ratio; symbol error; truncated union upper bound; Constellation diagram; Crosstalk; Degradation; Detectors; Frequency; Lattices; Maximum likelihood detection; Signal to noise ratio; Steady-state; Upper bound;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon '89. Proceedings. Energy and Information Technologies in the Southeast., IEEE

Conference_Location

Columbia, SC

Type

conf

DOI

10.1109/SECON.1989.132530

Filename

132530