Baseband Input Waveform and Its Power Spectrum, AWGN Channel Output and Its Power Spectrum, Signal Constellation Before and After Rayleigh Channel

This content covers: 1. Baseband input waveform and its power spectral density 2. QPSK modulated signal and its power spectrum 3. AWGN channel output and its power spectrum 4. Signal constellation diagrams before and after Rayleigh channel transmission 5. Bit error rate performance under AWGN and Rayleigh fading channel conditions with theoretical AWGN curves, all BER curves plotted using identical coordinate scales