System for the quantitative measurement of impairments in the communication channel of a quadrature amplitude modulation data communication system
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United States of America Patent
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Apr 26, 1983
Grant Date -
N/A
app pub date -
Mar 2, 1979
filing date -
Mar 2, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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