Crosstalk Loss Requirements for PCM Transmission

Author

Murthy, B. R Narayana

Author_Institution

VIDAR, Mt.View, CA, USA

Volume

24

Issue

1

fYear

1976

fDate

1/1/1976 12:00:00 AM

Firstpage

88

Lastpage

97

Abstract

We present in this paper a unified approach to the crosstalk interference problem arising in PCM transmission on paired cables. For bipolar signaling, and three types of commonly used channel shaping, viz., cosine, raised cosine, and Gaussian, we present the minimum average near-end crosstalk (NEXT) and far-end crosstalk (FEXT) loss requirements at any transmission rate as a function of repeater spacing and number of interfering pairs so as to meet a desired error rate objective. This will aid in indicating if new cables need to be developed for a proposed rate of transmission or, for a given cable, the error margin available for degradations other than crosstalk can be readily determined. Extension to other coding schemes is indicated, and crosstalk compatibility is examined for mixed $T$ systems, such as $T1$ , $T1C$ , and $T2$ . Graphical results are presented to readily aid in system design of any $T$ carrier with repeater spacings up to 70 dB.

Keywords

Crosstalk; PCM communication; Wire communication interference; Cables; Crosstalk; Degradation; Error analysis; Frequency; Interference; Phase change materials; Propagation losses; Pulse modulation; Repeaters;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1976.1093188

Filename

1093188