发明名称 |
Method and system for single-sideband optical signal generation and transmission |
摘要 |
A method and system for generating and transmitting optical signals with only one sideband. Single-sideband optical signal transmission reduces the signal impairment effects associated with dispersion. Such transmission also increases the spectral efficiency of optical transmission systems. Single-sideband modulation also makes possible electrical compensation for optical link dispersion during transmission. Single-sideband modulation is generated using the modulating data signal and its Hilbert transform, which is approximated by a tapped-delay time filter. Line coding is used to remove the low-frequency content in the modulating data signal, avoiding the inefficiencies of tapped-delay-line filter approximated Hilbert transformers at low frequencies. Line coding can also help optical single side band signal generation and transmission using a simple optical filter instead of Hilbert transformers.
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申请公布号 |
US6661976(B1) |
申请公布日期 |
2003.12.09 |
申请号 |
US20000477816 |
申请日期 |
2000.01.05 |
申请人 |
AT&T CORP. |
发明人 |
GNAUCK ALAN H.;LAM CEDRIC F.;WOODWARD SHERYL LEIGH |
分类号 |
H04B10/155;(IPC1-7):H04B10/04 |
主分类号 |
H04B10/155 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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