QAM Signal Generation and Demodulation with Bit Error Rate Calculation

This implementation covers QAM signal generation, demodulation, and bit error rate calculation through multiple interconnected modules. For QAM signal generation, different modulation schemes such as Quadrature Amplitude Modulation (QAM) or Binary Phase Shift Keying (BPSK) can be implemented using constellation mapping algorithms. The generation process typically involves dividing input bits into in-phase and quadrature components, applying pulse shaping filters (like raised-cosine filters), and upconverting to carrier frequency. Demodulation employs matched filtering techniques synchronized with the transmitter, followed by symbol decision-making using minimum Euclidean distance criteria in the constellation diagram. Bit error rate calculation is performed by comparing demodulated bits with original transmitted bits through error counting algorithms, often implemented with cross-correlation functions or XOR operations. These modular programs demonstrate practical implementation approaches for understanding QAM signal processing chains, including key functions like constellation mapping, coherent detection, and statistical error analysis.