Comparison of modulation schemes for a pseudo-ternary 2.048 Mbit/s PCM multiplex signal in rural communications

Author

de Krom, W.H.C. ; Verlijsdonk, A.P.

Author_Institution

Div. of Telecommun., Eindhoven Univ. of Technol., Netherlands

fYear

1989

fDate

1-2 June 1989

Firstpage

392

Lastpage

395

Abstract

In some rural communication systems, BPSK modulation is used for transmission of a pseudo-ternary primary multiplex PCM signal. In general the application of BPSK modulation has been appropriate, since BPSK modulation yields reasonable bandwidth utilization at low system complexity. However, a trellis-coded modulation system with rate R=1/2 convolutional coding and QPSK modulation is found to be superior. This system has a coding gain compared to BPSK modulation of approximately 3.3 dB, assuming ideal QPSK (de)modulation.<>

Keywords

digital radio systems; encoding; phase shift keying; pulse-code modulation; 2.048 Mbit/s; 3.3 dB; BPSK modulation; QPSK modulation; coding gain; convolutional coding; pseudo-ternary primary multiplex PCM signal; rural communications; trellis-coded modulation system; Amplitude modulation; Bandwidth; Binary phase shift keying; Convolution; Convolutional codes; Costs; Decoding; Modulation coding; Phase change materials; Phase modulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing, 1989. Conference Proceeding., IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC, Canada

Type

conf

DOI

10.1109/PACRIM.1989.48384

Filename

48384