Somaraju, RamTrumpf, Jochen2015-12-100018-9448http://hdl.handle.net/1885/59095A fundamental problem in any communication system is: given a communication channel between a transmitter and a receiver, how many independent signals can be exchanged between them? Arbitrary communication channels that can be described by linear compactKeywords: Arbitrary communication; Channel model; Communication channel; Compact operators; Degrees of freedom; Degrees of freedom (DOF); Fundamental problem; Independent signals; Normed spaces; Singular values; Civil aviation; Communication channels (information t Degrees of freedom (DOF); Essential dimension; Modes of communication; Operator channels; Singular values201010.1109/TIT.2010.20408952016-02-24