短波猝发通信中的分数间隔均衡器研究

摘要

短波信道具有多径、衰落和时变特性,在均衡过程中,线性均衡器收敛速度慢、收敛精度低,而分数间隔均衡器具有更好的均衡效果.为此,根据短波猝发通信中使用的波形结构,针对短波信道的特点,提出基于最小均方误差算法、递归最小二乘算法以及平方根卡尔曼算法的T/4分数间隔均衡器组合结构.仿真结果表明,在短波猝发通信中,与传统的线性均衡器相比,提出的分数间隔均衡器均衡速度快,收敛精度高,同时在通信系统中误码特性有明显的提升,更适用于短波信道.%The short wave channel has characteristics of multipath,fading and time variant.In the equilibrium process,the convergence rate of Liner Equalizer(LE)is slow,the convergence precision is low,and the Fractional Spaced Equalizer(FSE)has better balance effect.So according to the waveform structure used in short wave burst communication,against the characteristics of short wave channel,this paper proposes a composite structure of T/4 FSE by employing Least Mean Square error(LMS)algorithm,Recursive Least Square(RLS)algorithm and square root Kalman algorithm.Simulation results show that in the short wave burst communication process,compared with traditional LE,the proposed FSE has faster balance speed and higher convergence precision.At the same time,the error characteristics of the communication system are significantly improved,which is more suitable for short wave channel.