Review of signals and systems: bandpass and lowpass signal representation, equivalent low-pass models. Amplitude modulation (AM) and demodulation, AM radio broadcasting and signal multiplexing. Angle modulation and demodulation: frequency modulation (FM) and phase modulation (PM) . Coherent and non-coherent detection. FM Radio Broadcasting and FDM. Bandpass and lowpass random processes: Noise representation and analysis: SNR analysis of AM and FM systems. Analog-to-digital conversion: sampling, quantization and waveform coding (pulse code modulation, differential pulse code modulation and delta modulation). TDM and pulse modulation techniques: PAM, PPM, PWM.