Title :
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
fDate :
7/1/1982 12:00:00 AM
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;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOM.1982.1095612
