Title :
The performance of trellis-coded modulation
Author_Institution :
Nanjing Univ. of Post & Telecommun.
Abstract :
Trellis-coded modulation (TCM) in an 8-PSK (phase shift keying) scheme is more power efficient than uncoded QPSK at the same spectral efficiency on perfect coherent detection. For the same signal-to-noise ratio (SNR) of phase reference, the sensitivity to phase offset for 8-PSK is more serious than for uncoded QPSK. To analyze the effect of imperfect coherent detection, the equivalent distances under recovered carrier phase offsets are derived. The conditional event error probability and its upper bound with respect to recovered carrier phase offset are taken into account. The results for the average bit error probabilities of the 4-state, 2/3-TCM and uncoded QPSK schemes with noisy phase reference are given. It is shown that very high values of phase reference SNR are required for the efficient implementation of the TCM scheme
Keywords :
coding errors; phase shift keying; probability; trellis codes; 8-PSK; SNR; average bit error probabilities; carrier phase offsets; coherent detection; conditional event error probability; noisy phase reference; phase offset sensitivity; phase reference; phase shift keying; signal-to-noise ratio; spectral efficiency; trellis-coded modulation; uncoded QPSK; upper bound; Decoding; Error analysis; Error probability; Modulation coding; Phase detection; Phase noise; Quadrature phase shift keying; Signal to noise ratio; Upper bound; Viterbi algorithm;
Conference_Titel :
TENCON '92. ''Technology Enabling Tomorrow : Computers, Communications and Automation towards the 21st Century.' 1992 IEEE Region 10 International Conference.
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-0849-2
DOI :
10.1109/TENCON.1992.271961
