Circuit Theory and Communication

The high level of abstraction makes information theory a versatile and powerful tool for the analysis and optimization of a wide variety of communication systems. On the other hand, information theory has no concept of the flow of energy that accompanies the flow of information. Consequently, some important aspects of communication, like transmit power or noise covariance are by no means straight forward. In this book, we introduce effective methods which overcome this inherent limitation of information theory. We deal with this problem from a classic circuit theory point of view. This allows correct assessment of the energy flow in communication systems and thereby enables an information theoretic analysis and optimization which is consistent with the underlying physics of the communication system under investigation.