无线光通信中极化码构造方法研究

Research on Construction Method of Polarization Code in Wireless Optical Communication

针对无线光通信中极化码构造复杂度高的问题,提出一种适用于大气弱湍流信道的具有更低编码复杂度的湍流偏序构造法。将通用偏序技术引入到大气弱湍流信道中,利用蒙特卡罗法仿真确定弱湍流下子信道的关系,并将其与极化权重公式相结合,推导出最佳的参数值。仿真结果表明,在不同大气湍流强度下,湍流偏序法在低码率下可获得与蒙特卡罗法相同的误码性能,且在高码率下仍具有近似于蒙特卡罗法的性能,在误码率为10-4下只产生0.07dB^0.2dB的损耗,有利于提高系统的传输效率,为极化码与无线光通信的高效结合提供了解决方案。

To solve the problem of high complexity in the construction of polarization codes in wireless optical communication, a turbulence partial-order construction method with lower coding complexity is proposed, which is suitable for atmospheric weak turbulence channels. In this study, the conventional partial-order technique is introduced into the atmospheric weak turbulence channel, and the relationship among the subchannels of the weak turbulence is determined via Monte-Carlo method simulation. Combining the established relationship with the polarization weight formula, the optimal parameter value is derived. The simulation results show that under different intensities of atmospheric turbulence, the turbulence partial-order method can achieve the same bit error performance as the Monte-Carlo method at low bit rates, and its performance is also similar to that of the Monte-Carlo method at high bit rates, only 0.07-0.2 dB loss is generated at the bit error rate of 10 -4. This is suitable for the improvement of the transmission efficiency of the system and provides a solution for the efficient combination of polarization codes and wireless optical communication.