Cascade Scheme Based on Multiple-Input Multiple-Output in Spatial Optical Communication

Fig. 3. BP decoding state transition diagram when T2 has error. (a) T2's error transfers to S2; (b) after XOR, T3 and T4 have errors; (c) T4's error transfers to S3; (d) after XOR, T1 has error; (e) errors of T1 or T3 transfer to S1; (f) decoding ends

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Fig. 4. Relationship between decoding overhead and successful decoding rate

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Fig. 5. Performance comparison of LT codes and LT-PC codes. (a) Weak turbulence; (b) strong turbulence

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Fig. 6. Relationship between communication distance and BER in strong turbulence

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Table 1. Atmospheric turbulence simulation parameters
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Table 1. Atmospheric turbulence simulation parameters
Turbulence environment $\begin{matrix} {C_{n}^{2}}_{} \end{matrix}$ /m^-2/3 δ² α β
Weak 6.0×10^-16 0.3 8.43 7.30
Strong 2×10^-14 2.1 4.12 2.42

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Yang Cao, Xun Zhang, Xiaofeng Peng, Fatao Ren. Cascade Scheme Based on Multiple-Input Multiple-Output in Spatial Optical Communication[J]. Acta Optica Sinica, 2018, 38(1): 0106003

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