PULSE WIDTH MODULATION:
A modulation technique in which pulse of the carrier signal is changed in accordance with the amplitude comparison of message signal with carrier signal. CODE EXPLANATION: A message signal of particular frequency is defined then carrier signal of the form sawtooth is defined. Now desired result is obtained by comparing the amplitudes of message and carrier signals i.e if message signal is less than carrier signal pulse of output signal is zero otherwise pulse of the output signal is one.
1 Comment
EXPLANATION:
In frequency shift keying the amplitude of the resultant signal is varied in accordance with the input bit sequence that we have defined. If the bit sequence is 0 the resultant signal is an analog signal of a defined frequency 20 for a defined range of time. If the bit sequence is 1 the resultant signal is an analog signal of a defined frequency 50 for a defined range of time. EXPLANATION:
In amplitude shift keying the amplitude of the resultant signal is varied in accordance with the amplitude of the input bit sequence that we have defined. If the bit sequence is 0 the amplitude of the resultant signal is zero otherwise the resultant signal is an analog signal of a defined frequency for a defined range of time. EXPLANATION:
Now decreasing the sampling rate of already sampled signal is called the process of under sampling (down sampling). In some applications we require under sampling. Two different methods are used for this kind under sampling (down sampling). Following code and output shows the concept explained. EXPLANATION:
Now increasing the sampling rate of already sampled signal is called the process of up sampling. In some applications we require upsampling. Two different methods are used for this kind over sampling (upsampling). Following code and output shows the concept explained. Explanation:
When sampling process is done by using Nyquist criteria to avoid aliasing i.e the sampling frequency should be two times the frequency of the origional signal, the this is called Nyquist Sampling. Following code and its output shows the concept explained. Polar Coding Scheme?
Polar coding scheme is a type of line coding (a technique of converting digital data to digital signals). In bipolar coding scheme a ‘0’ bit represents a ‘0’ voltage level and a ‘1’ bit represents an alternative voltage level i.e if previously the voltage level was +1, now it would be -1 and if previously it was -1, now it would be +1. Polar Coding Scheme?
Polar coding scheme is a type of line coding (a technique of converting digital data to digital signals). In polar coding scheme a ‘0’ bit representation could be a positive ‘1’ voltage level and a ‘1’ bit representation could be a negative ‘1’ voltage level. Uni polar Coding Scheme?
Uni Polar Coding scheme is a type of line coding (a technique of converting digital data to digital signals). In uni polar coding scheme simply a ‘0’ bit represent a zero voltage level and ‘1’ bit represents a positive 1 voltage level. This blog post is about matlab code to implement a band stop filter in matlab. Its a sample matlab program which first defines variables and then implements the formula to design a band stop filter.
|
Categories
All
Archives
March 2014
This section will not be visible in live published website. Below are your current blog design settings: Current Number Of Columns are = 1 Blog Post Style = card Use of custom card colors instead of default colors = Blog Post Card Background Color = current color Blog Post Card Shadow Color = current color Blog Post Card Border Color = current color Use of custom colors instead of theme colors for below options= Blog Post Title Color = current color Blog Post Title Hover Color = current color Blog Post Date Color = current color Blog Post Date Hover Color = current color Blog Post Read More Link Color = current color Blog Post Read More Link Hover Color = current color Blog Post Comments Count Color = current color Blog Post Comments Count Hover Color = current color |