2002•Unpublished venueRequires access

Uniformity of high dimensional trellis-coded modulation

Changlin Chen, J.C. Dill, Yung-Cheng Lo, Alan R. Lindsey

Abstract

The uniformity of a new trellis-coded modulation for spread spectrum communications, called high dimensional trellis-coded modulation (HDTCM) is studied. High dimensional trellis-coded modulation integrates a new block code with permuted state structure and a high dimensional signal constellation. It combines not only coding and modulation, but also PN spreading into one single process. The uniformity of the scheme enables us to choose an arbitrary reference during performance analysis which greatly simplifies the performance analysis. The paper proves that high dimensional trellis-coded modulation with a bi-orthogonal signal constellation is a uniform scheme. It further points out that the uniformity of the HDTCM scheme depends upon the uniformity of the signal constellation used.

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Key concepts: Trellis modulation, Modulation (music), Constellation, Constellation diagram, Trellis (graph), Space–time trellis code, Computer science, Coding (social sciences)