This paper proposes a coding method based on parallel interleaved polar codes to mitigate the impact of fading caused by atmospheric turbulence and reduce the bit error interference of long slices.The method constructs an atmospheric turbulence channel using Monte Carlo simulation of Gamma-Gamma distributed random numbers,and determines the upper limit of the error probability of the polarized channel using pairwise error probability(PEP)and polarization spectrum.The method minimizes the error probability using the product distance criterion and establishes design criteria for parallel inter-leaving.The bit error rate(BER)performance of polar codes in turbulent channels is evaluated.Simulation results show that the parallel interleaving method based on polar codes has achieved an order of magnitude improvement in bit error per-formance.When the signal-to-noise ratio is 5 dB,the bit error rate is reduced from 5.11×10-6 to 2.13×10-7,effectively al-leviating the long-slice bit error caused by turbulence.The reliability and applicability of the simulation results are verified through experiments.
关键词
Gamma-Gamma信道/极化码/并行交织/成对差错概率
Key words
Gamma-Gamma channel/polar code/parallel interleaving/pairwise error probability
维普
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