Detailed QPSK Modulation and Demodulation Implementation

This is a detailed QPSK modulation and demodulation program that includes key steps such as serial-to-parallel conversion and signal detection decision-making. QPSK (Quadrature Phase Shift Keying) is a widely used modulation technique that converts digital signals into analog formats while effectively reconstructing original data during demodulation. In this implementation, we thoroughly explain the serial-to-parallel conversion process where sequential data streams are transformed into parallel I/Q components, and the detection mechanism that determines original data values based on received signal characteristics. The program demonstrates practical implementation through constellation mapping, where two bits are simultaneously modulated using phase shifts of 0°, 90°, 180°, and 270°. Through studying this program, you will gain deeper insights into QPSK modulation principles and implementation methodologies, including error detection algorithms and phase recovery techniques commonly used in digital communication systems.