无人机信道均衡的改进软判决准则设计  

Design of modified soft decision criterion based on UAV channel equalization

作　　者：姚安[1] 周子栋[1] 陈自力[1] 韦乃棋 

机构地区：[1]军械工程学院 [2]解放军63810部队

出　　处：《解放军理工大学学报（自然科学版）》2015年第3期220-223,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：为了降低无人机信道Turbo均衡接收机的复杂度,通过研究迭代停止准则技术,以软判决准则为研究基础,在计算机仿真的帮助下,通过数值拟合方法,建立了软信息绝对值均值收敛值与信噪比之间的函数关系,优化了判决准则门限值的选取工作,从而提出了一种新的迭代停止准则。通过计算机仿真比较,在合理的信噪比估计前提下,新的准则在性能和平均迭代次数上得到了优化。在判决、比较和存储操作的复杂性方面,新准则更具优势。To reduce the Turbo equalization receiver complexity applied in unmanned aerial vehicle（UAV） channel,iterative stopping criterion technology was studied.Based on the soft decision criterion,and with the help of massive computer simulations,the function between the convergency value of the mean value of soft information＇s absolute value and the SNR was established by the numerical fitting method,then a fresh criterion proposed,by which the threshold choosing work was optimized.Simulation results show that the new criterion is better than the others with respect to performance and average iterations based on reasonable SNR estimation.The new criterion also has more advantages in the decision,comparison and storage operations than the others,which sufficiently supports the UAV data link communications.

关 键 词：无人机 TURBO均衡 停止准则 软信息 门限 

分 类 号：TN929.5[电子电信—通信与信息系统]