基于串扰判决反馈信道均衡算法的语音通信系统设计

在强电磁干扰环境下,由于语音通信受到通信信道的快速时变衰落和码间干扰的影响,导致信道不均衡,降低了语音通信质量。提出一种基于串扰判决反馈信道均衡的语音通信系统的设计方法。该方法采用横向滤波器进行电磁干扰滤波器设计,利用语音通信信息传输信道频率特性的逆大于信息自身带宽的特征,通过调整均衡器参数进行,进行串扰判决反馈设计,结合信道自适应均衡处理技术,进行强干扰环境下语音通信信道均衡,以达到语音通信系统的优化。系统仿真结果表明,该语音通信优化系统具有抗电磁干扰能力及滤波性能较好、输出信噪比高、通信距离远、通信速度快、可靠性高等优点。

A Design of Speech Communication System Based on Crosstalk Decision Feedback Equalizer

The signal transmission and energy exchange in speech communication channel are affected by intersymbol interference in the environment of strong electromagnet, which leads to channel imbalance and reduces the quality of speech communication. This paper puts forward a crosstalk decision feedback equalizer, which adopts a transverse filter to optimize the communication channel subject to electromagnetic interference. The speech communication system consists of two modules: hardware modules and software modules. Simulation results show that the system has good anti-electromagnetic interference ability, good filtering performance, high output signal-to-noise ratio, long communication range, high communication speed and solid reliability.