Classification of signals and systems, orthogonal functions, fourier series, fourier transform, Spectra and filtering, sampling theory, Nyquist theorem, random processes, autocorrelation, power spectrum, systems with random input/output, quantization, compression, and PCM, elements of compression, Huffman coding, elements of quantization theory, pulse code modulation (PCM) and variations, Rate/bandwidth calculations in communication systems, Communication over AWGN channels, signals and noise, Eb/No, receiver structure, demodulation and detection, correlation receiver and matched filter, and MFSK, coherent and non-coherent detection, communication over band-limited AWGN channel, elements of coding.