this is the PPt,which we can use in advance digital signal processing,which is the subjetc of engg. and master of engg. in electronic branch. u vl get some knowedge with the help of this ppt. must check,simple and written n easy language.

1.
A SEMINAR
ON
“ Use Of DFT In Power
Spectral Estimation”
Presented By:
Mr. Pratik A. Bhore
Conducted By:
Prof. Mangesh Kakde
Abha Gaikwad Patil College Of
Engineering,Nagpur.

2. CONTENT
 What Is DFT?
 Power Spectral Estimation:
 The periodogram Analysis
 Autocorrelation Analysis

3.  What Is DFT?
It is a specific kind of discrete
transform use in a fourier
analysis.
It transform one function into
another which is called as
frenquency domain or DFT.

4. Discrete Fourier Transform
require input function that is
discrete.
Ex: Input Created by sampling,
such as “person voice”.

5.  Power Spectral Estimation
Purpose is to obtain
approximate Estimation of
power spectral density.
It can be estimated using DFT.

6. There are two basic
approches:
The Periodogram
Analysis
Autocorrelation
Analysis

7. The Periodogram Analysis
The Periodogram is defined as,
2
jω1 N −1
− jnω
I N (e ) = ∑ x[n]e
N n =0
N−1 N−1
1
I N (e jω
)=
N
∑x[n]e
n =0
− jnω
∑x[ r ]e jrω
r =0

8. Autocorrelation Analysis
N −1− m
ρ xx [m] = ∑ x[n + m ]x[n]
n =0
Which we shall call the
autocorrelation sequence of this
shorter signal.

9.
Thank You