发明名称 |
Eye modulation for pulse-amplitude modulation communication systems |
摘要 |
The present invention is directed to communication systems. More specifically, embodiments of the present invention provide a technique and system thereof for performing eye modulation. Eye modulation is performed at the transmission side of a PAM communication system to compensate for distortion and non-linearity and generate an output waveform. Spacing among eye levels is adjusted by performing symmetric modulation using α parameter and asymmetric modulation using β parameter. A correction module measures the output waveform and sends feedback signals to a control module to adjust the α parameter and the β parameter. There are other embodiments as well. |
申请公布号 |
US9559880(B1) |
申请公布日期 |
2017.01.31 |
申请号 |
US201615061874 |
申请日期 |
2016.03.04 |
申请人 |
INPHI CORPORATION |
发明人 |
Cirit Halil;Gopalakrishnan Karthik S. |
分类号 |
H03K7/02;H03K9/02;H04L25/08;H04L25/49;H04B10/54 |
主分类号 |
H03K7/02 |
代理机构 |
Ogawa P.C. |
代理人 |
Ogawa Richard T.;Ogawa P.C. |
主权项 |
1. A communication system comprising:
a control module being configured to generate a first control signal for adjusting an α parameter and a second signal for adjusting a β parameter, the α parameter and the β parameter being determined based on eye-modulation characteristics; a PAM transmitter being configured to perform eye-modulation on a source data and generate an output waveform using the α parameter and the β parameter, the α parameter being used to adjust a middle eye-height, the β parameter being used to adjust a top eye-height and a bottom eye-height, the source data comprising MSB data and LSB data, the top eye-height separating a first eye level and a second eye level, the middle eye-height separating the second eye level and a third eye level, and the bottom eye-height separating the third eye level and a fourth eye level; and a correction module being configured to measure eye-modulation characteristics, the eye-modulation characteristics including distortion and signal-to-noise ratios. |
地址 |
Santa Clara CA US |