System for the quantitative measurement of impairments in the co

Details System for the quantitative measurement of impairments in the co System for the quantitative measurement of impairments in the co

1979-03-02

1983-04-26

Wise, Edward J.

Boots, shoes, and leggings

455 67, 364574, H04B 314

Patent

active

043815464

ABSTRACT:
A system is provided for measuring communication channel impairments in a data transmitting system which employs quadrature amplitude modulation. The system rotates each point of sampled eye diagram information by a phase angle determined by the ideal value of the received point information so that the rotated point has its nominally maximum component on the real axis.

REFERENCES:
patent: 3629831 (1971-12-01), Mikus et al.
patent: 3631490 (1971-12-01), Palmieri
patent: 4028697 (1977-07-01), Albanese et al.
patent: 4035625 (1977-07-01), Chiu et al.
patent: 4074358 (1978-02-01), Caputo et al.

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