Abstract— with the latest advancements in electronics,

several techniques are used for removal of unwanted entities

from signals especially that are implied in the most

sophisticated applications. The removal of power line

interference from most sensitive medical monitoring

equipments can also be removed by implementing various

useful techniques. The power line interference (50/60 Hz) is

the main source of noise in most of bio-electric signals. The

report presents the removal of power line interference,

baseline wandering and additive white Gaussian noise

(AWGN) from ECG signal using the different types of

filtering technique. The project is based on digital signal

processing (DSP) techniques with MATLAB package, the

IIR Notch filter can be used for removal of power line

interference, Median can be used for Baseline wandering

noise and Discrete Wavelet Transform can be used for

removal of AWGN.