Bit Error Rate Analysis of Various Modulation Schemes and Demodulation Techniques

In this study, we establish an AWGN channel environment to statistically analyze the bit error rates of various digital modulation schemes including 2ASK, 2FSK, 2PSK, and 2DPSK, along with their primary demodulation techniques (both coherent and non-coherent). The implementation involves generating modulated signals using digital signal processing techniques, adding controlled Gaussian noise with varying SNR levels, and employing demodulation algorithms with error detection mechanisms. We will systematically compare the empirical BER results against theoretical predictions derived from communication theory formulas, and visualize the relationship between BER and SNR using graphical representations. This comparative analysis provides deeper insights into the performance characteristics of different modulation schemes and facilitates practical evaluation of their applications in communication systems. The code implementation typically includes signal generation functions, noise addition modules, demodulation algorithms with decision circuits, and BER calculation routines that count erroneous bits over sufficient simulation runs.