介绍了一种利用SOPC技术的无线激光通信误码测试仪的设计与实现方案。通过在FPGA中集成NiosII软核处理器,实现了通常需要MCU控制的用户界面,进而提高了设备的集成度与稳定性。此设计取代了传统的FPGA+MCU的误码仪结构。此外,还设计了硬件时钟恢复(CDR:Clock and Data Recovery)电路,实现了收发异地的双站式误码测试功能。最后,给出了利用该误码仪进行16km激光无线通信误码测试所得到的实验数据。
This paper introduces a design and implementation of BER tester using for wireless laser communication, which is based on a SOPC design method. When integrating a NioslI embedded processor into FPGA, it could easily achieve some functions such as user-control interface that is used to implement in MCU. And this method replaces the traditional BER tester's FPGA+MCU structure, and greatly improves the BER tester's integration and stability, And also, a CDR(Clock and Data Recovery) circuit is devised, so that it could allow the transmit and receive terminals are apart far away. At the end of this paper, some experiment results are given, which are recorded by the BER Tester in a 16km wireless laser communication experiment in Beijing.