Title :
TCM codes for 4PSK-2PSK modulation with invariance under rotation
Author :
Szulakiewicz, Pawel
Author_Institution :
Inst. Elektroniki i Telekomunikacji, Politechnika Poznanska, Poland
Abstract :
The paper contains an example of designing a 180° rotationally invariant TCM code with 3-dimensional 4PSK-2PSK signal space. All encoder input bits are carried directly to the output. No differential encoder is necessary. This eliminates the error multiplication effect caused by the differential decoding operation in the receiver. Examples are presented for 2, 4, 8, 16 and 32 encoder states. The codes achieve coding gain of 1.76 dB (for 2 encoder states) of 5.44 dB (for 32 encoder states) compared with the uncoded BPSK
Keywords :
phase shift keying; trellis codes; 3-dimensional 4PSK-2PSK signal space; coding gain; differential decoding; rotationally invariant TCM code; Binary phase shift keying; Constellation diagram; Convolutional codes; Decoding; Gain; Modulation coding; Phase detection; Quadrature phase shift keying; Signal design; Viterbi algorithm;
Conference_Titel :
Singapore ICCS/ISITA '92. 'Communications on the Move'
Print_ISBN :
0-7803-0803-4
DOI :
10.1109/ICCS.1992.255085
