大气激光通信中自适应调制编码技术的模式选择阈值

发布时间：2018-12-24 08:11

【摘要】：研究了一种用于大气激光通信自适应调制编码技术中的模式选择阈值的选取算法。分析了大气弱湍流信道性能,并对高斯信道中阈值选取算法进行修正,提出了一种信噪比-湍流强度选择方法来确定阈值区域模式,并给出了阈值选取方程。分析了湍流强度分别为0,0.1,0.2,0.3时3种传输模式下自适应调制编码系统的误码率,得到了最大误码率为10-4的条件下3种模式选择的信噪比与湍流强度阈值区域的对应关系。仿真结果表明,所提方法可行且能够准确地进行模式选择。
[Abstract]:A mode selection threshold selection algorithm for adaptive modulation coding in atmospheric laser communication is studied. The performance of atmospheric weak turbulence channel is analyzed and the threshold selection algorithm in Gao Si channel is modified. A SNR turbulence intensity selection method is proposed to determine the threshold region model and the threshold selection equation is given. The bit error rate (BER) of the adaptive modulation coding system in three transmission modes is analyzed when the turbulence intensity is 0. 1 / 0. 2 / 0. 3. The relationship between the SNR of the three modes and the turbulence intensity threshold region is obtained when the maximum bit error rate is 10-4. Simulation results show that the proposed method is feasible and accurate.
【作者单位】：解放军电子工程学院脉冲功率激光技术国家重点实验室;
【基金】：国家自然科学基金(61571446)
【分类号】：TN929.1

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