Digital Communications

Digital transmission of analogue signals, quantitative and qualitative analysis. Ideal and practical sampling, reconstruction of lowpass and bandpass signals, reconstruction problems and confrontation techniques. Quantization techniques, quantization noise. PCM systems, differential PCM, bandwidth requirements, timing, channel noise and signal to noise ratio S/N. Delta modulation systems, bandwidth requirements and signal to noise ratio S/N. Comparison of PCM and DM systems. Time-Division Multiplexing, TDM techniques, TDM-PAM transmitters-receivers and synchronization. General concepts of spread spectrum systems. Comparison between Ideal, PCM, DM, TDM, AM and FM communication systems. Error Control Coding, Linear Block Codes, Binary Cyclic Codes, Burst Error Correcting Codes, Convolutional Codes, code performance in error detection and correction.