发明名称 |
METHOD AND APPARATUS FOR RECOVERING A QAM CARRIER |
摘要 |
A method and apparatus are provided for recovering and tracking the carrier in a QAM communication system, even under heavy interference conditions. A subset of fixed points is defined on an ideal constellation pattern for comparison to the data points in a received signal. The subset includes all of the points intersected by n radii (e.g., the four diagonals) of the constellation pattern. Additional points along the perimeter of the constellation pattern can also be provided in the subset. Data points received via a carrier are correlated with the fixed points of the subset in order to generate an error signal indicative of a phase difference between the fixed points of the subset and the received data points correlated therewith.
|
申请公布号 |
CA2148200(C) |
申请公布日期 |
2002.09.17 |
申请号 |
CA19952148200 |
申请日期 |
1995.04.28 |
申请人 |
GENERAL INSTRUMENT CORPORATION OF DELAWARE |
发明人 |
HUANG, ZHENG |
分类号 |
H04L27/38;(IPC1-7):H04L27/38 |
主分类号 |
H04L27/38 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|