短波衰落信道下Turbo均衡算法研究  

Research on Turbo Equalization Algorithm in HF Fading Channel

作　　者：张凯 ZHANG Kai(Xi’an Fenghuo Electronic Technology Co. ,Ltd,Xi’an 710075,China)

机构地区：[1]西安烽火电子科技有限责任公司,陕西西安710075

出　　处：《无线电通信技术》2019年第3期295-300,共6页Radio Communications Technology

摘　　要：短波衰落信道下由于多径和衰落的影响,接收机的解调性能严重恶化,甚至无法正常通信。针对短波信道的特性,阐述了现有的经典Turbo均衡算法与结构,对短波信道的变化情况进行了分析,并提出了Turbo均衡的简化算法,该算法基于最小均方误差准则,利用译码器的输出构造平均信息与方差信息,修正了信道循环矩阵从而使得计算复杂度大大降低。最后对其在衰落信道下的性能进行了仿真,仿真结果表明,提出的Turbo均衡简化算法既降低了复杂度,又不损失性能。In HF fading channels,due to the effect of multi-path and fading,the demodulation performance of the receiver may deteriorate to make the receiver not be able to implement communication.In view of the characteristics of HF channel,this paper describes the classical Turbo equalization algorithm and structure,analyzes the variation of HF channel,and proposes the simplified Turbo equalization algorithm.Based on the MMSE rule,the algorithm utilizes the output of decoder to generate average information and variance information,and modifies the channel cycle matrix to decrease significantly the computational complexity.The simulations under the fading channel are performed.The simulation results show that the proposed simplified Turbo equalization algorithm can decrease the complexity and no performance deterioration occurs.

关 键 词：TURBO均衡 最小均方误差 横向滤波器 

分 类 号：TN911.1[电子电信—通信与信息系统]