The lecture "Communication Engineering 2" concentrates on basic topics, which are essential to understand and being able to develop modern communication systems. As a background, a thorough understanding of the topics dealt within "Communication Engineering I" is required, i.e. the knowledge of basic digital transmission principles and the most important special methods in case of AWGN channels. As a first point in this lecture the modelling of time-varying linear channels is treated, a topic which has become important in connection with digital mobile radio. The same holds for adaptive receiving and equalization methods. Channel and source coding, which are also considered, are encountered in every modern digital communication system. To understand and being able to develop communication systems, it is necessary to have knowledge in the fields of multiplexing and multiple access methods, local area networks, protocols and architecture models for communication systems. Furthermore, to get a general understanding of communications and a basis for channel and source coding, a certain knowledge of information theory is needed. 

The topics treated are 
  

• Modelling of time-varying linear channels: time-variant impulse response and time-variant transfer function, channel models (WSSUS, Rayleigh, Rice)
• Optimum and suboptimum receiving methods (TE, DFE, MLSE, Viterbi Algorithm), adaptation algorithms
• Multiplexing and multiple access methods: methods based on time, frequency and codes (TDM/TDMA, FDM/FDMA, CDM/CDMA)
• Introduction: queueing theory, protocols (example: ALOHA), local area networks
• Architecture of communication systems, short introduction: OSI model, protocols, repeater, bridges, router, gateways

In addition to the excercises there are demonstrations as part of some lectures which are intended to deepen the matter.