发明名称 |
CONSTRAINED CONTINUOUS PHASE MODULATION AND DEMODULATION IN AN OPTICAL COMMUNICATIONS SYSTEM |
摘要 |
A transmitter in an optical communications system includes a digital signal processor for processing a data signal to generate a sample stream encoding successive symbols in accordance with a constrained phase modulation scheme having a constellation of at least two symbols and a modulation phase constrained to a phase range spanning less than 4pi. A digital-to-analog converter converts the sample stream into a corresponding analog drive signal. A finite range phase modulator modulates a phase of a continuous wavelength channel light in accordance with the analog drive signal, to generate a modulated channel light for transmission through the optical communications system. A receiver in the optical communications system includes an optical stage for detecting phase and amplitude of the modulated channel light and for generating a corresponding sample stream, and a digital signal processor for processing the sample stream to estimate each successive symbol of the modulated channel light.
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申请公布号 |
US2013209089(A1) |
申请公布日期 |
2013.08.15 |
申请号 |
US201213371846 |
申请日期 |
2012.02.13 |
申请人 |
HARLEY JAMES;MCGHAN DOUGLAS;OVEIS GHARAN SHAHAB;ROBERTS KIM B.;ROLLINS MARK;CIENA CORPORATION |
发明人 |
HARLEY JAMES;MCGHAN DOUGLAS;OVEIS GHARAN SHAHAB;ROBERTS KIM B.;ROLLINS MARK |
分类号 |
H04B0010/000006;H04B0010/000008;H04B0010/000004 |
主分类号 |
H04B0010/000006 |
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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