军用无线电通信的码间干扰抑制算法仿真研究

Simulation of inter symbol interference suppression algorithm for military radio communication

军用无线电通信对通信质量和码元的保真性要求较高,军用无线电通信信道受到多径向量的影响产生码间干扰,需要进行码间干扰抑制,降低通信误码率。传统的码间干扰抑制方法采用波特间隔信道均衡算法,当通信信道受到电磁扰动的强度较大时,信道均衡性和码间干扰抑制能力不好。提出一种基于时间反转镜技术的军用无线电通信的码间干扰抑制算法,首先构建了军用无线电通信的信道模型,进行军用无线电通信的信道多径特性测量,采用自适应级联滤波器进行干扰滤波,结合时间反转镜技术实现码间干扰抑制算法改进。仿真结果表明,采用该算法进行军用无线电通信的码间干扰抑制,能有效提高通信传输的保真率,信道均衡性能较好,提高了通信输出的信噪比,降低通信误码率,提高了通信质量。

The military radio communication on the quality of communication and the symbol of fidelity requirements higher,military radio communication channel by the influence of multipath vector produced intersymbol interference, the need for intersymbol interference suppression and decrease the bit error rate of communication. The traditional inter symbol interference suppression method uses Potter interval channel equalization algorithm. When the communication channel is subjected to the intensity of electromagnetic disturbance,the ability of channel equalization and inter symbol interference suppression are not good. The paper presents the military radio communication intersymbol interference suppression algorithm based on time reversal mirror technology. Firstly,build military radio communication channel model,carry out military radio communication channel multipath measurement,interference filter using cascaded adaptive filter,combined with time reversal mirror technology realize the intersymbol interference suppression algorithm. The simulation results show that by using the algorithm of military radio communication intersymbol interference suppression,can effectively improve the fidelity of the transmission rate, achieve better channel equalization performance. Furtherly, the research can also improve the communication output signal-to-noise ratio,decrease the bit error rate of communication and improve the communication quality.