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An eight-dimensional 64-state trellis code for transmitting 4 bits per 2-D symbol

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1 Author(s)
Tretter, S. ; Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA

An eight-dimensional, 64-state, 90° rotationally invariant trellis code for transmitting 4 bits/baud over a bandlimited channel is described. The 2-D constellation contains 20 points. The code achieves a 5.23-dB coding gain over the uncoded 4×4 QAM (quadrature amplitude modulation) constellation and a 1.23-dB gain over the standard CCITT V32 trellis code. Simulation results are presented that verify these coding gains. Simulation results showing symbol error probability versus signal/noise ratio and trellis depth are also presented

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Selected Areas in Communications, IEEE Journal on  (Volume:7 ,  Issue: 9 )