Method of measuring communication channel impairement in polling

Details Method of measuring communication channel impairement in polling Method of measuring communication channel impairement in polling

1983-12-06

1987-03-31

Chin, Gary

Boots, shoes, and leggings

371 22, 375 10, 364514, H04B 346

Patent

active

046548076

ABSTRACT:
This invention provides a method of measuring the characteristics of the channel of a communication system using modems without automatic equalization. The method consists of preceeding a data string sent between modems by a set of TRAINING signals followed by a set of TEST signals. Preferably the TEST signals are chosen to eliminate intersymbol interference on the channel, so that the signals do not have to be equalized.

REFERENCES:
patent: 4034195 (1977-07-01), Bates
patent: 4055808 (1977-10-01), Holsinger et al.
patent: 4069402 (1978-01-01), Mantouani et al.
patent: 4385384 (1983-05-01), Rosburg et al.
patent: 4419751 (1983-12-01), Cholat-Namy
patent: 4516216 (1985-05-01), Armstrong

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