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论述了 STM- 1的解映射及去同步以获得 2 Mbit/s异步信号的实现方案 ,并提出了减小指针调整引起的抖动的自适应比特泄漏率算法 .FPGA、ASIC实现的硬件电路测试结果证明 ,文中论述的实现方法其性能完全满足 ITU标准 .
The realization of STM-1 de-mapping and desynchronization to obtain 2 Mbit / s asynchronous signal is discussed, and an adaptive bit leakage rate algorithm is proposed to reduce the jitter caused by pointer adjustment. The hardware circuit test results of FPGA and ASIC Prove that the performance of the method discussed in the article fully meet the ITU standards.