| 发明名称 |
Method and apparatus for recovering time-domain hybrid modulated QAM signals |
| 摘要 |
A method for recovering a quadrature amplitude modulated (QAM) signal is disclosed. The method includes receiving a QAM signal at a demultiplexers, where the QAM signal comprises multiple modulation schemes, splitting the QAM signal into k branches, where k is the number of QAM modulation schemes of the signal, passing the branch having the lowest order QAM modulation scheme to a first equalizer for recovering and tracking polarization and compensating polarization mode dispersion (PMD), updating a tap updating algorithm with a recovery value determined by the first equalizer, and recovering and tracking polarization and compensating PMD for all other branches based on the recovery value. |
| 申请公布号 |
US9106503(B1) |
申请公布日期 |
2015.08.11 |
| 申请号 |
US201414308315 |
申请日期 |
2014.06.18 |
| 申请人 |
Futurewei Technologies, Inc. |
发明人 |
Zhang Zhuhong;Li Chuandong |
| 分类号 |
H04L27/01;H04L27/38;H04J14/06 |
主分类号 |
H04L27/01 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for recovering a quadrature amplitude modulated (QAM) signal, the method comprising:
receiving a QAM signal at a demultiplexers, wherein the QAM signal comprises a plurality of modulation schemes; splitting the QAM signal into k branches, where k is the number of QAM modulation schemes of the signal; passing the branch having the lowest order QAM modulation scheme to a first equalizer for recovering and tracking polarization and compensating polarization mode dispersion (PMD); updating a tap updating algorithm with a recovery value determined by the first equalizer; and recovering and tracking polarization and compensating PMD for all other branches based on the recovery value. |
| 地址 |
Plano TX US |
