24- and 120-chanell transmultiplexers built with new digital signal processing LSI's
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概要
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Two new digital transmultiplexers intended for commerical 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.
- Institute of Electrical and Electronics Engineers (IEEE)の論文
Institute of Electrical and Electronics Engineers (IEEE) | 論文
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