Digital Communication Systems

In this course, mathematical models and methods are given to describe and evaluate communication systems for the transmission of digital signals:

- basics of signals and systems:

* description of signals and decibel notation,

* time-domain versus frequency-domain: LTI-systems, convolution, impulse response, Fourier-transformation, transfer function, filtering and definition of bandwidths,

- propagation loss in guided (cable) and unguided (wireless) media,

- noise and system noise calculations (link-budget),

- signal sampling, analogue pulse modulation (PAM, PCM, Delta-modulation),

- digital waveforms in baseband, power spectral density and spectral efficiency,

- line codes,

- bandpass signals and -systems: complex baseband description, modulation, demodulation, generic transmitter and receiver concepts: super heterodyne and direct conversion receiver,

- digital modulation techniques (OOK, FSK, BPSK, QPSK, MSK, QAM),

- matched filtering,

- bit error probability after detection of digital signals.