Detection of fatal transient impairments using an embedded secondary channel

Author

Lee, Yong-Hwan

Author_Institution

Motorola Codex Corp., Mansfield, MA, USA

fYear

1991

fDate

4-6 Nov 1991

Firstpage

321

Abstract

It is desirable for voiceband data communication equipment to have an efficient transient channel impairment detector for fast recovery. One such detector is proposed for high-speed modems using a secondary channel synchronously embedded in the main channel. A known code word being multiplexed with the secondary port data is sent through the embedded secondary channel. The received code word is tested for detection of fatal transient impairments. For reliable detection, the confirmation is sequentially performed based on a modified up/down counter scheme. The performance of the proposed detector is analytically evaluated in closed form

Keywords

counting circuits; modems; telecommunication channels; closed form; code word; fatal transient impairments; high-speed modems; modified up/down counter scheme; secondary port data; sequential confirmation; synchronously embedded secondary channel; transient channel impairment detector; voiceband data communication equipment; Acoustic noise; Bandwidth; Data communication; Degradation; Detectors; Frequency synchronization; Modems; Signal to noise ratio; Testing; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-2470-1

Type

conf

DOI

10.1109/ACSSC.1991.186465

Filename

186465