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TCM Without Constellation Expansion Penalty  

Kaminsky, Edit J. (Department of Electrical Engineering, University of New Orleans)
Ayo, James (University of Tennesee, College of Business Administration, Knoxville)
Publication Information
Journal of Communications and Networks / v.4, no.2, 2002 , pp. 90-96 More about this Journal
Abstract
We present a family of constant-amplitude constellations of even dimensions 8 and above. These constellations allow trellis coded modulation to be implemented without the usual penalty paid for constellation expansion. The new constellations are generated by concatenating either n QPSK points or n QPSK points rotated by 45 degrees, for any n $\geq$ 4. Our constellations double the number of points available for transmission without decreasing the distance between points and without increasing the average or peak energies, introducing asymmetry, or increasing the modulation level. Effective gains of 2.65 dB with minimum complexity through 6.42 dB with moderate complexity are demonstrated using the 8D constellation.
Keywords
Trellis coded modulation; constellation expansion; spherical codes; constant amplitude; multidimensional constellation.;
Citations & Related Records

Times Cited By Web Of Science : 1  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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