MATCHED MEDIAN FILTER FOR DETECTING QAM SIGNALS

In this paper, the complex matched median filter (MMF) is developed fo r QAM signal detection. It is shown, that the MMF is robust against im pulsive type noise. By combining the MMF and the linear matched filter (LMF), an extended class of matched filters Is introduced. These filt ers combine the desirable properties of MMF and LMF and behave well in varying noise environments. Computer simulations demonstrate that the proposed detectors give a much smaller symbol error probability than the LMP when the noise has an impulsive component and produces only a slight performance degradation in the case of pure Gaussian noise.