04683578 is referenced by 29 patents and cites 3 patents.

A phase and gain corrector is described for a modem for receiving QAM or PSK-encoded signals. An ideal vector corresponding to the received vector is generated and the difference or error vector is resolved into a radial component in the direction of the ideal vector a tangential component. A gain corrector and a phase corrector variable are calculated from said radial and tangential components of the error vector and used to correct the gain and phase of the received signals. A secondary detector is also used to detect signals corresponding to extreme points of the signal constellation. The output of the secondary detector is used to modify the gain corrector variable thereby compensating for large gain hits.

Title
Automatic gain control using the extreme points of a constellation
Application Number
6/752398
Publication Number
4683578
Application Date
July 5, 1985
Publication Date
July 28, 1987
Inventor
Edward S Zuranski
Largo
FL, US
William L Betts
St. Petersburgh
FL, US
Agent
Kane Dalsimer Sullivan Kurucz
Assignee
Paradyne Corporation
FL, US
IPC
H04L 27/08
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