论文部分内容阅读
通用异步收发器,是一种异步串行双工传输器。通常用在与其他通讯接口(如EIA RS-232)的连结上。由于收发两端的晶振不同步,接收端接收到的信号会随着通信时间的增长而出现信息的时隙偏移,导致接收端译码错误。为了避免时隙偏移造成译码错误,原始的解决办法是增加同步帧的插入频率。这样虽然可以实现成功通信,但是大大限制了通信系统的通信效率。本方案在接收端进行信息自同步采集和自适应解调与译码。能够使系统提高误码性能,自动调整时隙偏移,在提高通信效率的同时,保证了系统的可靠性。
Universal Asynchronous Receiver Transmitter is an asynchronous serial duplex transmitter. Usually used in connection with other communication interfaces (such as EIA RS-232). As the two ends of the crystal oscillator is not synchronized, the receiving end of the signal received with the communication time will increase the time slot information offset, resulting in the receiving end decoding error. In order to avoid decoding error caused by slot offset, the original solution is to increase the frequency of synchronization frame insertion. Although this can achieve successful communications, but greatly limits the communications system’s communication efficiency. The program at the receiving end of information self-synchronization acquisition and adaptive demodulation and decoding. The system can improve the error performance, automatically adjust the time slot offset, and improve the communication efficiency while ensuring the reliability of the system.