实现扰码的功能，主要为64位在pcs子层传输的扰码器设计(To achieve the functions of scrambling code)

双向PCS控制仿真，光纤陀螺输出误差的allan方差分析，可以得到很精确的幅值、频率、相位估计。( Two-way PCS control simulation, allan FOG output error variance analysis, You can get a very accurate amplitude, frequency, phase estimation.)