# Is it possible that adding noise to a signal can increase detection possibility?

I am simulating a feature detector in noisy environment which consist of AWGN Noise and Impulsive Noise. But I am getting a strange result as Signal with Impulsive+AWGN noise has better detection probability then with Signal with only AWGN. I know its wrong at some point. How Is it possible that signal with more noise like Impulsive noise has better detection possibility. Please share your experience.

• I have found that Sometimes it is possible with AWGN and the process is called Stochastic Resonance. But my signal is neither weak nor I had problem with AWGN because by increasing awgn strength my signal detection probability deteriorate and so is normal, but the abnormal thing is with Impulsive noise because as i increase Impulsive noise strength then it increases signal detection probability. And furthermore Impulsive noise doesn't show stochastic resonance property. – Marcus Nov 12 '14 at 13:36