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A Custom VLSI Chip Set for Digital Signal Processing in High-Speed Voiceband Modems

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2 Author(s)
Qureshi, S.U.H. ; Codex Corp., Mansfield, MA, USA ; Ahmed, H.

Systems modems intended for use in relatively large private networks are characterized by high performance, reliability and flexibility to support network management, and multiple modes of operation and user features. This paper describes a programmable digital signal processor which is teamed with a 16-bit microprocessor in a dual processor architecture satisfying the requirements of high-speed voiceband systems modems. The architecture of the two custom integrated circuits which form the basis of the signal processor is presented. This processor has novel arithmetic, data structure address generation, and program flow-control capabilities, which result in a high utilization of the arithmetic unit and a low program overhead for housekeeping tasks. Some of these features are illustrated by programming examples.

Published in:

Selected Areas in Communications, IEEE Journal on  (Volume:4 ,  Issue: 1 )

Date of Publication:

Jan 1986

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