一种强干扰环境下异步串行通信再同步方法

针对传统异步串行通信再同步方法在强干扰环境下暴露出的问题,提出了组合同步的概念,并将其应用于实现异步串行通信的再同步。接收端通过识别母同步码组的子同步码实现与发送端再同步,有效提高了复杂环境下的异步串行通信再同步概率。对算法实现进行了描述,给出了算法复杂度和实现再同步概率的数学表达式,定义了表征再同步算法抗干扰能力的度量标准并给出了表达式,就以上指标与传统再同步算法做了仿真比较和深入分析。以两种二进制频移键控(binary system frequency shift keying,2FSK)调制解调器搭建系统进行实验,验证了该方法的有效性。

Resynchronization method of asynchronous serial communication under the strongly interferential circumstances

In order to resolve the problems in the conventional resynchronization method of asynchronous serial communication under the strongly interferential circumstances,a conception of combined synchronization is developed,and used to realize the resynchronization of asynchronous serial communication.The resynchronization between receiver and transmitter is realized through identifying sub-synchronous code of mother-synchronous code group and the resynchronization probability of asynchronous serial communication under the strongly interferential circumstances is improved effectively.The realization of algorithm is presented,the expressions of its complexity and probability of realizing resynchronization are given,and the measured criterion of algorithm anti-interference ability is defined.To compare the algorithm with the conventional one on the above criteria,the simulation and analysis are done and its fine performance is demonstrated.Through the experiments with two systems,which based on two kinds of the binary system frequency shift keying(2FSK) modems,the algorithm's validity is tested.