Title :
An eight-dimensional 64-state trellis code for transmitting 4 bits per 2-D symbol
Author :
Tretter, Steven A.
Author_Institution :
Dept. of Electr. Eng., Maryland Univ., College Park, MD, USA
fDate :
12/1/1989 12:00:00 AM
Abstract :
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
Keywords :
codes; decoding; encoding; 1.23 dB; 2-D constellation; 5.23 dB; QAM; bandlimited channel; coding gain; decoder; eight-dimensional 64-state trellis code; encoder; quadrature amplitude modulation; rotationally invariant trellis code; signal/noise ratio; standard CCITT V32 trellis code; symbol error probability; trellis depth; Code standards; Concatenated codes; Constellation diagram; Convolutional codes; Decoding; Error probability; Euclidean distance; Gain; Lattices; Quadrature amplitude modulation;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
