| 发明名称 |
OFDMA overlay on legacy passive optical networks using optical nyquist filtering |
| 摘要 |
Methods and systems for combining signals include modulating data onto a first signal at a first frequency and wavelength; modulating data onto a second signal at a second wavelength using a modulation scheme that produces spectral components at the first frequency; filtering the second signal using an optical filter to suppress spectral components that would cause interference to the first signal; and combining the first signal and the second signal onto a transmission medium. |
| 申请公布号 |
US9225421(B2) |
申请公布日期 |
2015.12.29 |
| 申请号 |
US201414303873 |
申请日期 |
2014.06.13 |
| 申请人 |
NEC Laboratories America, Inc. |
发明人 |
Tanaka Akihiro;Cvijetic Neda |
| 分类号 |
H04J14/02;H04B10/2507;H04B10/516;H04B10/54;H04B10/548 |
主分类号 |
H04J14/02 |
| 代理机构 |
|
代理人 |
Kolodka Joseph |
| 主权项 |
1. A method for combining signals, comprising:
modulating data onto a first signal at a first frequency and wavelength using an orthogonal frequency division multiple access modulation scheme; modulating data onto a second signal at a second wavelength using an on-off keying modulation scheme that produces spectral components at the first frequency; filtering the second signal using an optical filter to suppress spectral components that would cause interference to the first signal; and combining the first signal and the second signal onto a transmission medium after filtering the second signal. |
| 地址 |
Princeton NJ US |
