The purpose of this project is to test the performance of the real time system.
1 Objectives
1. To learn how to analyse spectrum of a digital signal using DFT method
2. To learn how to program the DFT algorithm in C
3. To learn how to perform I/O operations using interrupt method and program/implement them using the evaluation toolkit
4. To evaluate the real time performance such as sampling rate, interrupt latency, response time and computer loading.
2 Overview
Real time digital signal processing requires high computational performance and fast real time response. Physical signals are to be sampled before being processed by computers or microprocessors. Issues such as sampling rate and analogue to digital conversion shall be considered in the first place.
In real time applications, input/output operations such as sampling signals or displaying signals are generally time-consuming so that such tasks shall be implemented in the interrupt service routine (ISR). Discrete Fourier Transformation (DFT) will be used for signal spectral analysis and will be coded and implemented in the real-time signal processing systems. The spectrum of the sampled signal will be displayed in external equipment or visual signal viewer.
Real time system performances especially interrupt latency, response time, and computer loading will be evaluated for this digital signal processing application.
Project Application
The micro-controller will act as a processor and process the algorithm that will read in a real time signal. A digital conversion will take place. Different sounds energy will corresponds to different shapes therefore; a spectrogram that works line a power spectrum helps to determine the amount of energy at different frequency.
Programmer: Has to be able to design the fft algorithm that is able to do this. After which come out with a detail report on how does this program works and how it meets the project objectives and the project applications.
A final report on the entire project has to created to give a detail explanation about the program and the project objectives. It has to be able to described fully how the methodology of the algorithm and the concepts of digital signal processing of fft, and the knowledge helps to come out with the entire solutions and explanations. A full report on the entire project has to be delivered.
A painful problem : your program/algorithm has to be able to read in my code composer studio and upload into my micro-controller. Programmer needs to think about this, how to configure the board, so that it can integrate together with the algorithm. Remember, the final output, the programmer has to be think how to display the final output. GOt input must have output. so how to display? This is needs to be solve.