Performance of 4- and 8-state TCM schemes with asymmetric 8-PSK in fading channels

Author

Subramaniam, L. Venkata ; Rajan, B. Sundar ; Bahl, Rajendar

Author_Institution

Centr for Appl. Res. in Electron., Indian Inst. of Technol., Delhi, India

Volume

49

Issue

1

fYear

2000

fDate

1/1/2000 12:00:00 AM

Firstpage

211

Lastpage

219

Abstract

For Rayleigh fading channels, Ricean fading channels with a small parameter and shadowed Rician channels with the code design criteria are to maximize the effective length as well as the minimum product distance of the code. In this paper, we use two different asymmetric 8-PSK signal sets in 4-state and 8-state rate 2/3 trellis-coded modulation (TCM) schemes and show performance gain over TCM schemes with symmetric 8-PSK constellations. The performance gain is due to an increase in the minimum product distance compared to that of the best known TCM schemes of comparable states using symmetric 8-PSK signal sets while the effective length remains same. Simulation is performed over the Rayleigh, Ricean, and shadowed Rician fading channels to demonstrate the performance gain of the asymmetric 8-PSK TCM schemes over the symmetric 8-PSK TCM

Keywords

Rayleigh channels; Rician channels; phase shift keying; trellis coded modulation; 4-state TCM; 8-state TCM; Rayleigh fading channels; Ricean fading channels; asymmetric 8-PSK TCM; asymmetric 8-PSK signal sets; code design; code length; minimum product distance; performance gain; shadowed Rician channels; simulation; symmetric 8-PSK TCM; symmetric 8-PSK signal sets; trellis-coded modulation; AWGN; Constellation diagram; Error analysis; Fading; Land mobile radio; Performance gain; Phase modulation; Phase shift keying; Rician channels; Speech;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.820713

Filename

820713