Matched median filter as detector for QAM signals

Author

Liu, Qin ; Astola, Jaabko ; Neuvo, Y.

Author_Institution

Dept. of Electr. Eng., Tampere Univ. of Technol., Finland

fYear

1991

fDate

11-14 Jun 1991

Firstpage

97

Abstract

The complex matched median filter (MMF) is developed under the maximum likelihood criterion for QAM (quadrative amplitude modulation) signal detection. It is shown that the MMF has the so-called robustness property similar to median filters in the case of impulsive noise. Based on the combination of the MMF and the linear matched filter (LMF), extended matched filters are also introduced. These filters have properties of both MMF and LMF and behave well in a varying environment. Computer simulations demonstrate that the proposed detectors give a smaller detection error probability than the LMF when impulsive noise is present

Keywords

amplitude modulation; error statistics; filtering and prediction theory; matched filters; signal detection; QAM signal detection; computer simulation; detection error probability; extended matched filters; impulsive noise; linear matched filter; matched median filter; maximum likelihood criterion; quadrative amplitude modulation; robustness property; Amplitude modulation; Computer simulation; Detectors; Error probability; Matched filters; Maximum likelihood detection; Noise robustness; Quadrature amplitude modulation; Signal detection; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1991., IEEE International Sympoisum on

Print_ISBN

0-7803-0050-5

Type

conf

DOI

10.1109/ISCAS.1991.176282

Filename

176282