Reference no: EM131302077
Using the MATLAB code developed for Example, determine and plot the magnitude of the complex envelope of both the unfiltered and the filtered π/4 DQPSK signal. What do you observe? Explain the results.
Example
In this example, several important signals present in a π/2 DPSK system are generated and displayed. The MATLAB program for simulating the system and generating the graphical output is given in Appendix A. Upon entering the program name, c8 pi4demo, at the MATLAB prompt, a menu is presented. From this menu the user may select one of the following seven options (after a plot is generated, hitting the space bar will display the menu so that another selection can be made):
1. Unfiltered π/4 DQPSK signal constellation
2. Unfiltered π4 DQPSK eye diagram
3. Filtered π/4 DQPSK signal constellation
4. Filtered π4 DQPSK eye diagram
5. Unfiltered direct and quadrature signals
6. Filtered direct and quadrature signals
7. Exit program (return MATLAB prompt).
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