中国激光, 2018, 45 (10): 1006003, 网络出版: 2018-10-12
基于保护时隙的一倍时隙频率采样光PPM时钟同步技术 下载: 648次
Clock Synchronization Technology for Pulse Position Modulation with Guard Time at Sampling Frequency of 1 Slot
图 & 表
图 1. 基于保护时隙的一倍时隙频率采样定时同步结构图
Fig. 1. Timing synchronization structure based on guard time with sampling frequency of 1 slot
图 2. 一倍时隙频率采样定时误差示意图
Fig. 2. Schematic diagram of timing error with sampling frequency of 1 slot
图 3. 光子数统计示意图。(a)时钟同步;(b)不同步
Fig. 3. Statistical diagram of photon counts. (a) Synchronization; (b) non-synchronization
图 4. 统计光子数分布曲线图(σ=0.2,τ0=1.2,γ=50,P=3,M=16,Ks=2,Kb=0.2)
Fig. 4. Distribution curves of statistical photon counts (σ=0.2, τ0=1.2, γ=50, P=3, M=16, Ks=2, Kb=0.2)
图 6. 信号采样点与插值调整点的定时关系图
Fig. 6. Timing diagram of signal sampling point and interpolation adjustment point
图 7. 不同保护时隙数及不同统计量下的频偏估计误差统计。(a) P=3,N=4×2520;(b) P=2,N=4×2520;(c) P=1,N=4×2520;(d) P=3,N=2×2520;(e) P=3,N=1×2520
Fig. 7. Statistics of frequency offset estimation errors under different number of guard time and different statistical data amounts. (a) P=3, N=4×2520; (b) P=2, N=4×2520; (c) P=1, N=4×2520; (d) P=3, N=2×2520; (e) P=3, N=1×2520
图 8. 不同保护时隙数及不同统计量下的初始相位估计误差统计。(a) P=3,N=4×2520;(b) P=1,N=4×2520;(c) P=3,N=1×2520
Fig. 8. Statistics of estimated initial phase errors under different number of guard time and different statistical data amounts. (a) P=3, N=4×2520; (b) P=1, N=4×2520; (c) P=3, N=1×2520
图 9. 基于保护时隙的插值匹配搜索精同步方案
Fig. 9. Interpolation matching search fine synchronization scheme based on guard time
图 10. 不同频偏误差统计光子数分布图(M=16,P=3,N=2520,Ks=2,Kb=0.2,(τ0)f=0.2 slot, Δγ=-1.8,σ=0.2)
Fig. 10. Statistical photon count distribution of different frequency offset errors (M=16, P=3, N=2520, Ks=2, Kb=0.2, (τ0)f=0.2 slot, Δγ=-1.8, σ=0.2)
图 11. 不同初始相位小数偏差统计光子数分布图(M=16,P=3,N=2520,Ks=2,Kb=0.2,(τ0)f= 0.2 slot,Δγ=-1.8,σ=0.2)
Fig. 11. Statistical photon count distribution of different initial phase fractional offset (M=16, P=3, N=2520, Ks=2, Kb=0.2, (τ0)f=0.2 slot, Δγ=-1.8, σ=0.2)
图 12. 不同方法的误码性能对比(N=2520,P=3,Kb=0.2,σ=0.2)
Fig. 12. Comparison of bit error performance of different methods (N=2520, P=3, Kb=0.2, σ=0.2)
图 13. 不同统计量的误码性能(N=2520,Kb=0.2,σ=0.2)
Fig. 13. Bit error performance of different statistics (N=2520, Kb=0.2, σ=0.2)
图 14. 不同抖动参数下的误码性能(Kb=0.2,σ=0.2,P=1)
Fig. 14. Bit error performance of different jitter parameters (Kb=0.2, σ=0.2, P=1)
向劲松, 陈雪莉, 张培, 贾元明. 基于保护时隙的一倍时隙频率采样光PPM时钟同步技术[J]. 中国激光, 2018, 45(10): 1006003. Xiang Jingsong, Chen Xueli, Zhang Pei, Jia Yuanming. Clock Synchronization Technology for Pulse Position Modulation with Guard Time at Sampling Frequency of 1 Slot[J]. Chinese Journal of Lasers, 2018, 45(10): 1006003.