Volume 7 Issue 2
Mar.  2014
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WANG Xu, WANG Ting-feng, WANG Di-nan, WANG Hua-long. Rapid synchronization technology for wireless optical link[J]. Chinese Optics, 2014, 7(2): 245-252. doi: 10.3788/CO.20140702.0245
Citation: WANG Xu, WANG Ting-feng, WANG Di-nan, WANG Hua-long. Rapid synchronization technology for wireless optical link[J]. Chinese Optics, 2014, 7(2): 245-252. doi: 10.3788/CO.20140702.0245

Rapid synchronization technology for wireless optical link

  • Received Date: 14 Dec 2013
  • Rev Recd Date: 13 Feb 2014
  • Publish Date: 25 Mar 2014
  • A small size free space optical communication system is introduced, including the hardware structure and the hardware specified physical layer protocol. The rapid synchronization technology applied in protocol is introduced in detail. The technology could reduce waste of bandwidth in the synchronization process between the communication terminals. The hardwares of the system include the laser driver system, the signal amplifying and shaping system, the data interface system. The hardware specified physical layer protocol is used for external signal interface, serialization and de-serialization of the data stream, checking transmission errors and scheduling the data transmission. The system is designed mainly for terrestrial FSO link whose signal channel is the atmosphere. In our system, the sampling clock is generated locally by using multi-phase sampling technique rather than PLL-based clock recovery, which can obtain more rapid synchronization speed and improve the utilization efficiency of bandwidth in the wireless optical communication system and reduce the Bit Error Rate(BER) in the communication.

     

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