针对卫星量子通信中的偏振保持问题,研究了大气散射、大气湍流以及卫星与地面站间相对运动对量子偏振态的影响。提出了一种采用量子同步修正比特存储信道偏振影响,而后对数据比特进行修正变换的偏振补偿算法。仿真对比了补偿前后系统量子误码率(QBER),补偿后系统量子QBER可低至0.7%,表明本文方案具有较好的偏振补偿效果,可实现安全有效的卫星量子通信,且无需对系统增加任何附加设备。
In view of the polarization maintaining problem in quantum communication using satellites,the impacts of atmospheric scattering,atmospheric turbulence and the relative motion between satellite and ground station on the photon polarization states in satellite quantum communication are researched.Put forward a new compensation scheme,which stores the channel′s polarization effect in the synchronization correction quantum bit,and then uses the compensation algorithm to modify the data bits.After transition,the data quantum bits will be its original form.The quantum bit error rate(QBER)of the system is simulated,and the system′s QBERcan be reduced to 0.7%.The results show that the compensation scheme is valid,and it will achieve the safe and effective satellite quantum communication.And the scheme has the advantage that it needn′t to add any additional devices to the system.