Extraction of Periodic signal masked by noise using correlation.
Aim: To extract a periodic signal masked by noise using correlation.
PC with windows (95/98/XP/NT/2000).
%Module to find period of input signl
% Adding noise and plotting noisy signal
% To generate impulse train with the period as that of input signal
%Correlating noisy signal and impulse train
%plotting the original and reconstructed signal
Result: In this experimentthe Extraction of periodic signal masked by noise using correlation have been verified using MATLAB.
1. Define the condition for distortion less transmission through the system.
Ans: Transmission is said to be distortion less if the input and output have identical wave shapes within a multiplicative constant.A delayed output that retains the input waveform is also considered distortion less.Thus in distortion-less transmission, the input x(t) and output y(t) satisfy the condition:
y(t) = Kx(t - t) where t is the delay time and k is a constant
2. What is filter?
Ans: Electronic filters are electronic circuits which perform signal processing functions, specifically to remove unwanted frequency components from the signal, to enhance wanted ones, or both.
3. What are low-pass and band-pass filter and what is the difference between these two?