24- and 120-Channel Transmultiplexers Built with New Digital Signal Processing LSI´s

Author

Maruta, Rikio ; Kanemasa, Akira ; Sakaguchi, Hisashi ; Hibino, Masao ; Nakayama, Kenji

Author_Institution

Nippon Electric Company, Ltd., Takatsu-ku, Kawasaki, Japan

Volume

30

Issue

7

fYear

1982

fDate

7/1/1982 12:00:00 AM

Firstpage

1528

Lastpage

1539

Abstract

Two new digital transmultiplexers intended for commercial use have been developed. One transmultiplexer performs a bilateral conversion between two 12-channel FDM group signals and a 24-channel PCM carrier signal. The other mutually connects two 60-channel FDM supergroup signals and five 24-channel or four 30-channel PCM signals. Both exploit a block processing digital SSB-FDM multiplex/demultiplex scheme employing a cascade of an FFT processor and a set of complex coefficient digital filters. They have been built using newly developed high-level DSP LSI chips. Algorithmic considerations, developed LSI architecture, and equipment configuration are described as well as digital processor design details and measured performance.

Keywords

multiplexing equipment; signal processing; transmultiplexing; 12-channel FDM group; 24-channel PCM carrier signal; FFT processor; algorithmic consideration; bilateral conversion; complex coefficient digital filters; digital SSB-FDM multiplex/demultiplex; digital implementation; digital processor design; digital signal processing LSI´s; digital transmultiplexers; supergroup signals; Algorithm design and analysis; Digital filters; Digital signal processing; Digital signal processing chips; Frequency division multiplexing; Large scale integration; Phase change materials; Process design; Semiconductor device measurement; Signal processing algorithms;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1982.1095612

Filename

1095612