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    Communication device
    3.
    发明授权
    Communication device 有权

    公开(公告)号：US09712900B1

    公开(公告)日：2017-07-18

    申请号：US14253394

    申请日：2014-04-15

    Applicant: Google Inc.

    Inventor： Chiachi Wang ,  Romain Clement

    IPC: H04J14/00 ,  H04Q11/00 ,  H04J14/02 ,  H04B10/50 ,  H01S3/067

    CPC classification number: H04Q11/0005 ,  H01S3/06754 ,  H04B10/00 ,  H04B10/50 ,  H04J14/02 ,  H04Q2011/0016 ,  H04Q2011/0041

    Abstract: A communication method includes combining first and second optical signals into a third optical signal, processing the third optical signal, and separating the third optical signal back into the first and second optical signals. The method includes sending the first optical signal out a first system port, sending the second optical signal out a second system port, receiving a fourth optical signal in the first system port, and receiving a fifth optical signal in the second system port. The method also includes combining the fourth and fifth optical signals into a sixth optical signal, processing the sixth optical signal, and separating the sixth optical signal back into the fourth and fifth optical signals.

    Acquisition and Tracking Apparatus for Free Space Optical Communications
    5.
    发明申请
    Acquisition and Tracking Apparatus for Free Space Optical Communications 审中-公开

    公开(公告)号：US20170339695A1

    公开(公告)日：2017-11-23

    申请号：US15156459

    申请日：2016-05-17

    Applicant: Google Inc.

    Inventor： Chiachi Wang ,  Sheng-Hui Yang ,  Romain Clement ,  Michael Sholl

    IPC: H04W72/04 ,  H04B7/185

    CPC classification number: H04W72/0453 ,  H04B7/18513 ,  H04B10/1123

    Abstract: A method includes receiving a first optical signal at a first communication terminal from a second communication terminal through a free space optical link. The received optical signal contains a modulated unique frequency tone. The method also includes mixing the modulated unique frequency tone with a reference signal to provide a mixed output signal and determining a signal strength of the modulated unique frequency tone based on the mixed output signal. The reference signal includes a same frequency as the modulated unique frequency tone. The method adjusts an optical head of the first communication terminal to establish acquisition and optical beam pointing with the second communication terminal based on the signal strength of the modulated unique frequency tone received from the second communication terminal.

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