Asymptotically optimal trellis coded modulation systems

• An asymptotically optimal trellis-coded modulation (TCM) system requires thejoint design of the encoder and the binary labeling of the constellation. Thisproblem can only be solved via exhaustive searches over the encoder and thelabeling which is unfeasible for large constellation sizes. In this paper, westudy binary labelings for TCM and show how they can be grouped in (modifiedHadamard) classes, which considerably reduces the search space. Using thisclassification, we formally prove that it is always possible to design a TCMsystem based on the binary-reflected Gray code (among many other labelings)with identical performance to the one proposed by Ungerboeck in 1982.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)

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