Title :
New TCM codes for 4PSK-2PSK modulation
Author :
Szulakiewicz, P. ; Kotrys, R.
Author_Institution :
Politech. Poznanska Inst. Elektron. i Telecommun.
fDate :
6/23/1994 12:00:00 AM
Abstract :
The authors present some new multi-dimensional (3-D, 4PSK-2PSK) and 180° rotationally invariant trellis codes that combined with the demodulator (which locks onto the 2PSK signal of the 3-D signal set) allows robust operation at low signal to noise ratios. Examples of the codes are presented for 2, 4, 8, 16 and 32 states. The codes achieve a coding gain of 1.76 dB (for two encoder states) to 5.44 dB (for 42 encoder states) compared to uncoded BPSK. Distance profiles of the codes are shown
Keywords :
phase shift keying; trellis codes; 1.76 to 5.44 dB; 180° rotationally invariant trellis codes; 3-D signal; 4PSK-2PSK modulation; TCM codes; coding gain; demodulator; distance profiles; encoder states; multi-dimensional codes; signal to noise ratios;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19940688
