一种基于序列调制的自适应抖动抑制方案

针对指针调整将会在SDH网络与PDH网络交界处引起大幅度的低频抖动的问题,文章在现有研究成果的基础上,提出了一种基于序列调制的自适应抖动抑制方案,该方案采用新的基于统计预测和缓存监测相结合的比特泄漏周期自适应调制方法,可以有效地避免相同极性的网络工作模式转换所造成的缓存器溢出损伤;给出了实现序列调制的设计原理,计算了网络在非劣化模式和劣化模式下的比特泄漏周期指标和序列调制时间指标.仿真与实际应用表明,该方案可以简单而有效地解决指针调整抖动的抑制问题.

A sequence-modulation-based adaptive jitter suppression scheme

In view of the large-amplitude and low-frequency jitters induced by pointer adjustment at the boundary between SDH and PDH networks, a sequence modulation-based adaptive jitter suppression scheme is presented on the basis of the existing research results. Adopting bit leakage cycle adaptive modulation based on statistical prediction combined with buffer storage monitoring, it can effectively avoid buffer storage overflow caused by the operating mode changes of networks with the same polarity. The design principle for implementing sequence modulation is given and the bit leakage cycle and sequence modulation time in both normal and degraded modes calculated. Simulation and practical applications have shown that by this scheme pointer adjustment jitters can be easily and effectively suppressed.