A Modular Transmultiplexer System Using Custom LSI Devices

Author

Rossiter, Timothy J M ; Chitsaz, Sirus ; Gingell, M. ; Humphrey, Leslie D.

Author_Institution

Standard Telecomm. Labs., Ltd., Harlow, Essex, England

Volume

30

Issue

7

fYear

1982

fDate

7/1/1982 12:00:00 AM

Firstpage

1540

Lastpage

1551

Abstract

The design and operation of a 24- or 60-channel transmultiplexer based on a 12-channel signal processing module (or kernel) is described. The signal processing algorithm employs complex signal processing, and allows very low crosstalk and noise figures to be achieved without excessive group delay. The processing algorithm and the custom LSI devices used in its implementation were developed together to produce a low cost and low power implementation. Its performance amply meets the requirements of CCITT and North American specifications. Operation of the attendant subsystem, such as telephony signaling converters, is also described.

Keywords

multiplexing equipment; transmultiplexing; 12-channel signal processing module; 24-channel transmultiplexer; 60-channel transmultiplexer; analog group filtering equipment; channel passband; complex signal processing; custom LSI devices; design; group delay; kernel; line interface; low crosstalk; low power; modular transmultiplexer system; noise figures; operation; polyphase filter; processing register; programmable multiplier; sample rate increase; signal processing algorithm; signaling conversion system; telephony signaling converters; time-varying filter; Algorithm design and analysis; Assembly systems; Filters; Kernel; Large scale integration; Partitioning algorithms; Passband; Signal design; Signal processing algorithms; Time division multiplexing;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1982.1095611

Filename

1095611