ALIASING AND SAMPLING USING ORTHONORMAL BASES

Instructional report by Yogesh Sawant (ID: 104605545) in partial fulfillment of course requirements of ESE 558


Submitted to
Professor Murali Subbarao









Aliasing
Aliasing is a potential problem whenever an analog signal is point sampled to convert it into a digital signal Aliasing is what happens when analog data is represented on a digital system. It happens whenever an analog signal is not sampled at a high enough frequency. A curved line drawn on a grid, where the curved line represents the analog data and the grid represents the digital system, is a good example of analog data on a digital system (see figure 1.1)



Figure 1.1 Figure 1.2 Digital version of the line
Line on grid representing analog
data on digital system

When the analog data is converted to digital some problems arise. The digital sy...