发明名称 |
SYSTEMS FOR IMPROVED SPECTRAL EFFICIENCY IN MULTI-CARRIER COMMUNICATION SYSTEMS |
摘要 |
This disclosure provides systems, methods, and apparatus for improving spectral efficiency of a communication system. The communication system can include a transmitter, a receiver and a communication link for communicating data between the transmitter and the receiver. The transmitter can employ a multi-carrier technique to transmit data to the receiver. The transmitter can generate a plurality of carrier signals using a receiver-side comb generator, one of which is sent to the transmitter as a pilot carrier signal combined with modulated carrier signals over an optical link. At the receiver the receiver-side comb generator uses the pilot carrier signal to generate a plurality of receiver-side carrier signals, which are used for detecting the modulated carrier signals. As the phase noise in the modulated carrier signals and the phase noise in the receiver-side carrier signals have the same characteristics, the phase noise is cancelled at the receiver, resulting in improved detection. |
申请公布号 |
WO2017019898(A1) |
申请公布日期 |
2017.02.02 |
申请号 |
WO2016US44550 |
申请日期 |
2016.07.28 |
申请人 |
GOOGLE INC. |
发明人 |
DANGUI, Vinayak;KOLEY, Bikash;VUSIRIKALA, Vijay;HOFMEISTER, Ralph, Theodore |
分类号 |
H04B10/43;H04B10/63;H04J14/02 |
主分类号 |
H04B10/43 |
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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