為了充分利用光信號的寬帶寬資源和提高信道利用率，完成線速率為2.5 Gb/s的多路信號高速傳輸，在FPGA上設計并實現了一種時分復用通信系統，并對其功能和性能進行了測試與驗證。為了克服普通FPGA傳輸速率低于1 Gb/s的性能缺陷，選用了Xilinx內嵌了支持3.75 Gb/s最高傳輸速率的吉比特收發器的高速FPGA。最終測試結果表明，在短距離有線傳輸條件下，該系統成功實現了線速率為2.5 Gb/s的無誤碼的時分復用通信。

　　Abstract:

　　To take full advantage of wide bandwidth of optical signal and improve utilization of channel resources， a TDM(Time-Divided Multiplexing) communication system in FPGA was designed to implement high speed transmission of multipath in the line rate of 2.5Gb/s. System functionality and performance were also tested and verified. To overcome the performance defect of common FPGA that its transfer rate is lower than 1Gb/s， Xilinx high-speed FPGA which embedded MGT(Multi-Gigabit Transceiver) that supported the highest data rate of 3.75Gb/s was used. Test shows that under short-distance wire transmission condition， the system successfully achieves TDM communication of no error-code， and line rate is up to 2.5Gb/s.

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