公开(公告)号：US20170033870A1

公开(公告)日：2017-02-02

申请号：US14813756

申请日：2015-07-30

Applicant: Google Inc.

Inventor： Vinayak Dangui ,  Bikash Koley ,  Vijay Vusirikala ,  Ralph Theodore Hofmeister

IPC: H04B10/40

CPC classification number: H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02 ,  H04J14/0279

Abstract: 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.

Abstract translation: 本公开提供了用于提高通信系统的频谱效率的系统，方法和装置。 通信系统可以包括用于在发射机和接收机之间传送数据的发射机，接收机和通信链路。 发射机可以采用多载波技术将数据发射到接收机。 发射机可以使用接收机侧梳状发生器产生多个载波信号，其中一个被发送到发射机，作为通过光链路与已调制的载波信号组合的导频载波信号。 在接收机处，接收机侧梳发生器使用导频载波信号来产生多个接收机侧载波信号，用于检测已调载波信号。 由于调制载波信号中的相位噪声和接收机侧载波信号中的相位噪声具有相同的特性，所以在接收机处消除相位噪声，从而改善了检测。

公开(公告)号：US09705599B2

公开(公告)日：2017-07-11

申请号：US14813756

申请日：2015-07-30

Applicant: Google Inc.

Inventor： Vinayak Dangui ,  Bikash Koley ,  Vijay Vusirikala ,  Ralph Theodore Hofmeister

IPC: H04B10/00 ,  H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02

CPC classification number: H04B10/40 ,  H04B10/43 ,  H04B10/63 ,  H04J14/02 ,  H04J14/0279

Abstract: 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.